Lb7 duramax knocking noise. Save Share Feb 8, 2010 · 01-04.

Lb7 duramax knocking noise I Check and make sure the balancer is not wobbling. At first everything seemed in order. 2011 Chevrolet Black smoke and loud knocking sounds like injectors stuck. bigdave_185 Oct 4, 2013 · 01-04. Jump to Latest A "Tick" is a lot different than a "Knock"-- many vehicles have the tick and GM has stated that it is a normal noise for the Duramax trucks. If I´m flooring it it goes away and nothing at idle or very light acceleration. 50 x 24 Designed, Built, and Fabricated by ME May 2010 & April 2011 -Diesel World Magazine Featured Vehicle Oct 5, 2024 · It's coming from near the engine bay, it sounds almost like a knocking sound or a ticking noise. Jump to Latest 27K views so i went to the drag strip a few days ago truck sounded good. Duramax 6. No smoke of any kind. 5 LB7 Duramax Powertrain A guy not to far from me is trying to sell his 01 duramax for cheap. Jan 9, 2012 · I recently purchased a 2002 duramax lb7 and ever since its been making a loud knocking sound or ticking at idle and under load. 5 Jan 22, 2012 · 2013 Chevy Silverado 2500 LTZ, Duramax LML, Deviant EGR delete with up-pipe, Flo-Pro 4" downpipe back exhaust, Motor Ops EFI Live with SOTF switch. Matches with RPM. Ron Nielson 271 Replies. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Jul 28, 2010 · 1600 miles and the noise is still there. If you cancel a particular cylinder and the noise goes away, 2001-2004 (LB7) Duramax Second Generation: 2004. Not thicnking nothing of it keep going and all of a sudden start to hear this knocking noise. Recommended Communities. Top Contributors this May 9, 2008 · I could be wrong, but the injector fits with the knocking sound problem. It only makes this sound when the engine is under a load though even a light load like normal accelleration. Dec 3, 2010 · 2011 LML knocking noise. I thought the noise was a bad pulley or the tensioner pulley, so I removed belt checked all pulleys they appeared to be fine so I started it up for a few seconds with out belt and noise was still there when running the noise would be quiet than super loud than quiet at idle. injectors sound to almost knock or an injector sounds to knock. I took a mechanics stethescope to her tonight, couldn't find the noise, went underneath, and its coming from my bell housing. I'm wondering what ideas that you guys would have on how I can quite the noise down. Chevy 04. Sep 27, 2024 · 01-04. 6 LB7 Duramax, Banks Six-Gun Kit w/ Speedloader, Straight Pipe Stock Exhaust, DieselPlace. when i left the track i notice the truck had a louder knocking sound. -2006 LLY GMC Sierra 2500 4x4 CC/SB and the truck started knocking like it was coming apart. Joined Feb 8, 2010 · 340 Posts. It sounds like a knocking noise not a tick i used to just have tick May 25, 2010 · Chevy / GMC Duramax 01-04. Tapping - Ticking Noise. THIS IS NOT A NORMAL NOISE. I took a video and I think I was wrong. M. The bad thing is, is that he claimed the motor was knocking. 7K views 4 replies 3 participants last post by Lb7Al Apr 21, 2022. LB7 Turbo Noise (Whine) Jump to Latest 3. Here is what we think: The 2001-2004 LB7 Duramax 6600 operates with a high oil pressure, running somewhere in the 60 psi range when hot. 01-04. Jump to Latest 23K views 14 I started the truck once since then and there was a small knocking sound for about 3 seconds and then it went away, it also blew a good amount of white smoke. Feb 27, 2009 · 2002 2500HD LB7, 4'' MBRP exhaust, stage II AFE intake, Boost and Pyrometer gauges, PPE boost valve, Customed tuned by Bernie @ BR Powersource!! !! 3'' lift its like a knocking sound i guess, i know its REALLY hard to diagnose without hearing it. AVS Forum Oct 26, 2006 · I had a very similar problem with the whole knocking noise. 2L Diesel Engine Suspension & Steering - 2001 - 2010. 2003 Chevrolet 2500hd CCSB LB7 Jul 21, 2008 · The truck seems to run best under full throttle. . Duramax LB7 problems. Don't ask me how I know, had to have aluminum adapter plate, flywheel flex plate and torque convertor replaced because of torque convertor bolts coming loose after tranny build. Starts awesome hot or cold no missing no smoke idles great runs good. Knocking continued with foot applied on brake pedal and in drive/reverse 1200-1600 rpm “knock” “knock”, cylinder cut out test found sound coming from #6 cylinder. I used the delco filter and Rotella oil. it's really noisy when you accelerate up a hill. But is there throughout most of the rpm range. Hello my lb7 duramax when it’s cold it idles fine but when warmed up it sounds like something is knocking and has poor fuel mileage and also throws some blue smoke it also has aftermarket injectors. looks like my My brothers LB7 carries about 30psi at idle, but off idle it will shoot right up to 40-45psi. 1 Customer: 2003 duramax has knocking noise form pass side valve cover ran find when i shut it off knocks and smoking bad Mechanic's Assistant: 2003 gmc duramax lb7. Jump to Latest 41 - 48 of 48 Posts. Come join the discussion about modifications, towing Full Forum Listing. RPM dependent whine---Hydroboost??? Jump to Latest 24K views 10 replies I chased a noise for some time, even thought it was TC/trans related at one point. General Discussions 01-04. V2 or a Tech 2 would be able to read the balance rates and turn off Dec 6, 2024 · Chevy / GMC Duramax 01-04. its a constant metal tapping. It sounded good for about 1 minute and then it started knocking hard and black smoke. Top Contributors this Month View All. Ron Nielson 193 Replies. Also had an injector start The noise usually is most noticeable at the rear of the drivers side front wheel well. You can hear it inside the cab when sitting at a light and when your going down the road. Cause This ticking noise is caused by oil bubbling and excited by the V8 configuration and combustion sequence. Under load the injectors are loud but once I hit 2900 rpm the sound is gone completely out doesn't fade out it just stops like you flipped a switch Apr 25, 2020 · I heard a knocking sound under low rpm take off. Jul 17, 2011 · 01-04. this is my first Duramax so I'm not 100% its a fuel knock but all rod knocks I've ever heard don't stop as this Duramax appears to be doing. Is that the noise you all are saying is normal. Most common under load around 15-2000rpm. Mar 9, 2014 · Knocking noise. glenlloyd 69 Replies. Chevy / GMC Duramax 01-04. 2005 Duramax LLY LS trim 4x4 Mods: Secondary Cooling System with fan and shroud, Larger custom main radiator equipped with heat exchangers for oil and tranny fluids, larger transmission cooler, custom larger lower panel, KD custom ECM, EGR blocker, Sun Coast ram air hood, Air Raid intake, AFE turbo MP and downpipe back exhaust, 75Gallon aux tank, LB7 Screeching Sound while Accelerating. Knocking Noise That can't be the Typewriter tic. 2019 Chev Silverado LTZ Crew Cab 3500hd Duramax. ChevyTech77 185 Replies. I have had one act up intermittently for a period of time, then gradually go into a knock. Jump to Latest 2003 lb7 knocking. rwood64083 212 Replies. This high oil pressure produces more oil flow that is Jul 30, 2011 · 2013 Chevy Silverado 2500 LTZ, Duramax LML, Deviant EGR delete with up-pipe, Flo-Pro 4" downpipe back exhaust, Motor Ops EFI Live with SOTF switch. Just looking for confirmation before I go ahead and buy 4 more injectors. 9K views Last week my LB7 started making a horrid whining noise, comparable to a supercharger. piston slap or crank bearing knock. Tags bad idle knock. May 10, 2013 · I've noticed several times that when I let off after accelerating I hear a ticking noise for about 2 seconds, then it quits. Jan 31, 2009 · Mine was making a knocking noise coming from that same wheel well. Jul 2, 2013 · I am hoping this knocking sound is an injector issuse vs. All Duramax™ engines are manufactured to very close tolerances to meet the durability and reliability standards. With a dipstick that clean I'd say you have a decent amount of fuel in the oil, or NO oil Time to drain it and measure the amount! Need LB7 Injectors? Check these Anyone heard every heard this sound in there trucks? I drove it yesterday and it was fine, fired it up before heading up to snowboard this morning and heard this knocking sound. 6 duramax (LB7) all stock (no mods) Jan 24, 2013 · 2012 White Chevy Silverado LTZ LML 3500 CC/SB SRW Deleted, MotorOps LPS & TCM Tuning, Edge Insight CTS2 with EAS EGT Probe and Fuel Press Sensor, Deviant Racing PCV Re-route, Res Delete Plug and EGR Block Plates, S&B CAI, Fass Titanium 150 w/Draw Straw, Nictane Cat fuel filter adapter, MBRP 3" Downpipe, 5" Flo-Pro DP back Exhaust, BDS Feb 12, 2015 · It does sound like a injector in my opinion. If the knock noise wasn't there before you changed the injectors then I would chalk it up to air in the lines from the changeover. Chevy diagnosed as a bad injector wasn' the case then a cracked fly wheel again wasn't the case. The engine idles better than ive ever heard it. A compression test will help verify if it's When I got off of the highway I noticed a rotational knocking. Tags engine ticking noise. rwood64083 207 Replies. If noise reduced/gone with belt off - normal characteristic. It scared the Jan 6, 2011 · The noise could be described as an irregular ticking or clacking sound like random typing on a mechanical typewriter. 5 LB7 Duramax Powertrain LB7 fuel knock????? It's louder than valve noise but not as loud as a blown Injector. Jump to Latest 19K views 12 is it a thumping noise? or a knocking noise. As I decelerate between this range, it will start to knock at around 1600 then go away at around 1500 then 01-04. I have a clicking noise in the top end. knocking noise I heard a knocking sound under low rpm take off. Apr 2, 2022 · All of a sudden had this problem out of no where have a lb7 partially built with 69k original miles. mp06011999 188 Replies. TexasRedNeck 193 Replies. Sounds like you lost a piston unfortunately. Noise quits when i let off throttle. Jump to Latest 1. 2L Diesel Engine Duramax Third Generation: 2006-2007. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Dec 30, 2018 · Can it be assumed that this noise was not there prior to the injector replacement, or was it also making this off idle knocking prior to the injector replacement? 2003 2500HD 6. Tags Over this last weekend, my truck started making a loud screeching noise that sounds like a giant cat in heat is under the hood. Feb 11, 2009 917 0 16 Duramaxdiesels. Only show If the noise goes away, you have isolated the cylinder. Front end "thumping" sound. 66 posts · Joined 2014 Add to quote; Only show this user #1 · Mar Dec 24, 2017 · So I have a bone stock 235,000 mile lly reg cab long bed 4wd. Jul 20, 2008 · The engine also makes a pretty loud ticking or knocking sound like an injector clattering or maybe like a rocker arm is about to fly off. Sep 22, 2009 · i have been noticing latley my truck has been making alot more noise at idle. 1500 RPM. What's New Chevy / GMC Duramax 01-04. Top Contributors this Month with 6. Im convinced its the injectors. Any codes with this issue? What kind of aftermarket injectors? My truck is in the shop getting new injectors (115,000 miles) its a long story describing my issues I was having but I noticed a knocking sound similar to what you have just not as loud. Aug 25, 2012 · Got a LLY duramax with a knocking sound during light accelration, especially in the 1650 - 1800rpm area. Only mods it has is a mouth piece fass 150 lift pump and pcv reroute. As soon as I get on the throttle though I can hear it start to "knock" or "whack". I used crappy oreilys reman injectors. Does this sound correct? (LB7) Duramax Second Generation: 2004. 6 engines ** LBZ , LB7 , LLY , LMM They claim that all engines have this noise , just that its more Feb 22, 2017 · However, this last time along with the P0087 -Low Fuel Rail Pressure, the engine started making what sounds like a knocking noise. I don't think it's the (typewriter noise) anyone have any suggestions? It seems to follow the rpms There's also a a baffled deep sound coming from the air intake Aug 29, 2017 · All Duramax™ engines are manufactured to very close tolerances to meet the durability and reliability standards. I plan to get to the bottom of it so I will post any info I find out. Oct 5, 2008 · After swithching to synthetic about 50 miles ago now it has a knocking sound that is more speradic not steady at all like an old gas engine with valve problems and increases when going up hills or steady throttle. SOLD TRUCK: 2003 Silverado 2500HD, Ext Cab Sep 21, 2013 · Noticed a rather loud ticking noise coming from underneath of truck when I accelerate. More gas i give it the louder and faster the knocking is. LB7 smoking. When the tranny is cold, yeah it seems slow to change gears, you got to help it by easing up slightly off the accelerator pedal or just accelerate hard enough to get the computer to realize that it Sounds like a pressure valve on the rail or an FCA a fuel knock and smoke condition will exist. The noise usually is most noticeable at the rear of the drivers’ side front wheel well. Sounds just like a noisy lifter. rwood64083 181 Replies. mp06011999 205 Jan 14, 2013 · High oil pressure/ rattling knocking noise. AVS Forum Feb 4, 2011 · they can sound like a bad rod knock, FPR can also make it knock if stuck in high pressure. Advanced Search Cancel Login / Join. 5 LB7 Duramax LB7 bad knock??? Thread starter Yellow Jacket; Start date Apr 15, 2012; Forums. My truck just runs louder. I visited GM-Trucks and on their forum "Rod knock at 500 Miles", there are many owners complaining about the exact same Jan 4, 2025 · Knocking/Clacking Sound. 5 Chevy Silverado 2500HD 2WD, Duramax LLY, LBZ Mouthpiece, 4" MBRP downpipe back exhaust. there was no mistaking that there was a serious issue though. 02 duramax has "spark knock" Jump to Latest 15K views 37 replies or its gummed up,either way its getting fuel to early making that knocking noise u hear, even if diesel pretty much run on detonation to much and it can still go boom. Thinking internal now. It happens between 1600-1100 rpm. Im going to try reducing pilot timing and/or pulse and see if thats helps. 2014 Ram 2500 Tradesman 4x4 6. While test driving I noticed a ticking sound from 1100 rpm till short of 3000rpm. Strange Knock. I used victor "c" gaskets and new gaskets and seals on everything i removed. after about thirty minutes it starts smoking and knocking. All Duramax diesel engines have this condition, however, some are more audible than others. In gear it is noticeable as well when the The truck seems to run fine and has plenty of power but this "knock" just sounds really odd. 5 LB7 Dec 4, 2013 · 01-04. mpbond Discussion starter. Nov 20, 2015 · It is making a pretty loud knocking noise. its all the time, in park or driving. Lb7Al Discussion starter. I think it must be a normal engine noise for the Duramax or at least the newer ones. The overall noise reduction in engines produced today makes this noise seem new when in fact it was masked by other noises in the past. I shut it off and restarted it and this time no knocking sound, but a little white smoke and then I Apr 12, 2012 · The noise could be described as an irregular ticking or clacking sound like random typing on a mechanical typewriter. Discussion starter · #21 · Mar 14, 2010. For some reason my phone picked up the sound better than I can hear it sitting in the driver seat. Jump to Latest General Discussions 01-04. That darn knocking / clacking / ticking noise. Can anyone please give me some input on what this might be? Oct 19, 2008 · The light knocking noise sounds like the pre-injection on the engine is not workingpossibly due to a programmer or something. I have not been able to pinpoint the source. Run ability -Ok, No smoke, No misfire, No blow by, No crazy balance rates, I drove to work. Oct 30, 2019 · 2004 LB7 Chevy 2500HD LT CCSB 4x4, 4" RCD Lift 35" Toyo A/T2 day and asked what the thumping noise was. You would be surprised just how loud of a knocking/ticking sound a blown headgasket can make. I was getting fuel knocking noise like crazy; also black smoke, loss of power. i thought it was the crank. I had a dealer test the injectors today - nothing wrong, said they tested great. does not sound like a rod knock. Started taking stuff apart to try and find the problem and sure enough i had blown a head gasket. Oct 6, 2015 · Don't know if that is what your noise is but if it is the torque convertor bolt and it comes loose it can cause lots of damage. have the shop disable an injector one at a time till noise goes away and i strongly recommend NOT driving the truck while you have fuel knock . Tim Member #67 A(ACLU) Agent Sgt. Slaughter (LB7) Duramax Second Generation: 2004. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. Another Mar 9, 2007 · Noise Engine noise most audible when engine coolent temps of 70 C or 158 F , or higher and from idle to approx. Truck needs some work but thats not the issue. I tried raising main fuel pressure, and the noise became more pronounced. After some Googling, I believe that is the problem. so im not sure Mar 7, 2014 · 01-04. 5 LB7 Duramax Powertrain Ping or detonation sound help Just finished replacing the injectors (fun job) now i can distinctly hear a pinging of detonation sound. The truck was at the dealer more than at my house, they replaced all 8 injectors and it still was knocking. It only happens when my foot is on the pedal, not even hard, just anything past getting out of a parking spot. The knocking or tapping sound seems to go away completely when the pedal is to the floor. rwood64083 204 Replies. In park at about 1,500 RPM I hear the knock. 5 LB7 Duramax Powertrain. 6L Duramax™ Diesel Engine (VIN 1 – RPO LB7) Some of the above vehicles may exhibit a random ticking noise that is most audible on an engine with a coolant temperature of 70 ° C (158 ° F) or higher and from idle to approximately 1500 RPM. it runs much better but the knocking Aug 19, 2013 · 2008 GMC 3500HD CC LB DRW 4x4~Westin Step Bars, WeatherTech Floor Liners, Antenna "Delete", Plasti Dipped Grill and Emblems and Rims, Leveled, Funky Gear Rims, Nictane Adapter with Donaldson and Clear Bowl, 3" Magna Flow Down Pipe, 5" Diamond Eye Exhaust Dumped, EFI By Kory, Crobra 29LTD WX/BT/NW CB, Dual 4' Firesticks, Recon Roof Apr 9, 2019 · I just bought my first Diesel and its an 04 LB7 with 156k on it. ChevyTech77 198 Replies. :gearjamin ** This applies to all Duramax 6. No reason for it to make the knocking sound I had heard once before. ) sound similar to a valve or lifter That to me sounds like just a heavy fuel knock. Also had an injector start Apr 20, 2022 · Lb7 Knocking Sound in 2004 Duramax. My problem is knocking sound under load. The noise is not real noticeable when the engine is cold, 01-04. Pretty hard to describe the noise. Sep 29, 2011 · The noise could be described as an irregular ticking or clacking sound, like random typing on a mechanical typewriter. (LB7) Duramax Second Generation: 2004. Once warmed up the noise is almost completely gone. 6. Jump to Latest 2. xtreme torture 2003 duramax diesel lb7 six inch fab tech lift, fabtech tie rods, amp electric steps, 20 inch forged weld racing rims, suncoaststage5 trans, sd nitrous, TTs extreme programmer,TTs dual lift pumps ,power shot propane injection stage 2 afe air intake, and 4 inch turbo back tts exhaust Jun 18, 2010 · lb7 ticking noise. 5 LLY Duramax/5 Speed Allison, Precision Industries ML Converter. 6 duramax (LB7) all stock (no mods) Save Share Oct 30, 2010 · knocking noise after fuel filter change. Ron Oct 25, 2009 · 119,000 Smoke, Loud Knocking Sound, Shut Down Won't Start. After recording the noise, it sounds pretty metallic in the video. Tags General Discussions 01-04. So I got the pump off and got to playing with it. and it was blown shocks in the frontbut like you said you have new shocks. People are now expecting gas engine quietness from a diesel under all circumstances. Feb 21, 2018 · Took my truck appart 5 times thinking it was an install issue. Fender tub, belt, front plastic skid pan, 3 12mm nuts and a vacuum line. Rod bearing, broken crank, etc. I replaced my ac compressor a day or two before the sound came about with a brand new unit, figured that may have been the cause Sounds to me like you have an injector that is leaking fuel but just causing some smoke and raw fuel in the exhaust at idle at normal rail pressure at idle, but when you max out the fuel rail press at idle you are causing the injector that is slightly leaking to start leaking much worse and start spraying enough fuel to cause your horrible knock. I have added all the updates in my signature and the truck ran well beside a ticking noise. 5 LB7 Duramax Powertrain engine knocking sound at 1500 to 1800 rpm just installed all 8 injectors on my 01 this knocking sound happened before I did the install so I am going to rule out the injectors them self. 9 626rwhp on a weak fuel pump :think: 6. I can post a longer clip here soon if needed. Top Feb 24, 2010 · I have an 03 - 112K on it. Apr 17, 2016 · I should also note that it only SOUNDS like 1 injector making the knock sound but i could be wrong. Fuel Knock on a Duramax. The engine noise sounded a little louder than my 06 but I did not think much of it when I test drove the truck. I got out to listen and did hear it. This condition has been present in diesel engines produced for the last 20 or more years. D-maxin General Discussions 01-04. Jump to Latest 21K views I noticed a ticking/tapping noise after my last oil change. 03 Knocking? Jump to Latest Follow 1 - 12 of 12 Posts Oct 31, 2013 · Does it sound like my truck 3 weeks ago? I just had a stuck injector, idled pretty rough and sounded like it was going to blow! Here was a video I took before I got it fixed - LB7 Duramax with stuck open injector - YouTube Oct 8, 2013 · with 6. I noticed tonight that it seems to be idling a little rougher than it did before. 6 Technical. Shaking just a tad. glenlloyd 119 Replies. 5 LB7 Forums. Jump to Latest Yeah mine does it to and it seems like a loud knocking noise under acceleration. Only show this user Sep 24, 2008 · 01-04. 3 posts · Joined 2022 Add to quote; Only show this user #1 · Apr 20, 2022. rwood64083 188 Replies. Ron Nielson 196 Replies. Jun 23, 2014 · 2002 LB7 starts up and idles fairly smooth not as smooth as it should be. We strive to In order to re-establish proper timing, install knock pins in the oil pump drive gear if the crankshaft reluctor was removed from the oil pump drive gear. Save Share Jan 28, 2012 · This is what i know. Im new to dmax . Jump to Latest 2004 Chevrolet CC/LB Dually 4x4 Duramax LB7 Bullet Proof Suspension 10/12 inch Lift Diesel Wheels 24 inch Quantum Design Interco SS M-16 40 x 14. rwood64083 213 Replies. I have a 2005 lly duramax - stock - all updated from dealer - however I have an occasional idle surge and engine knock around 1500 rpm and during light acceleration. rwood64083 210 Replies. Jump to Latest 13K views 13 replies Sep 29, 2009 · Engine Rattle/ Valves Knocking What is it Help me! I have the same issue as described in the previous post. com Rear Window Decal, Sony Stereo, Infinity and Polk Speakers Sep 18, 2011 · Duramax First Generation: 2001-2004 (LB7) 03 duramax knocking sound. Everything is the same minus mine being a built trans and his had sac 45 injectors. 57diesel 212 Replies. i hear it on light to medium throttle, and after the truck warms up. knocking under load!!! Jump to Latest 14K views 9 well mine is bad it never sounded like this before just started out of the blue sound like a loud unclean diesel noise or a loud lifter knock . I'm Nov 3, 2012 · 01-04. He said after it started making noise, he shut it off immediately and then had the motor pulled 06 LBZ - Loud Whining Sound on Low End Acceleration - PROBLEM SOLVED! General Discussions 01-04. Wants a turbo!! or two Figured out the noise. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. Jump to Latest 6K views 21 replies 12 participants last post by 03wyolb7 Mar 10, 2014. Jump to Latest dude thats an Lb7 engine, that means you have a bad injector, chances are was not head gaskets causing the noise, but head gasket problem is very possible. Wierd how the engine knocks when you disable an injector. Jump to Latest and found I had 4 injector that were out of spec and I tried to disable them but I was unable to hear a change in the sound. Save Share Feb 8, 2010 · 01-04. It says LB7/LLY on the header of the bulletin. I am new to the DuraMax and my truck is knocking around 17-2200 RPM sound like a rod, I have an edge on my truck,it knocks also,if you efi live on instead does it still make the knocking noise . Mar 22, 2012 · I have looked and looked over my truck trying to figure out where this damn noise is. not normal diesel clatter. Ron Nielson 195 Replies. I. Let us know what you find. mp06011999 249 Replies. The knock pins are available through the parts department. From what I understand, that's not a lot for LB7 injectors, but very few LBZ need injectors that soon. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Apr 16, 2020 · Ok. Please discard Corporate Bulletin Number 02-06-01-022G (Section 06 - Engine/Propulsion System). If I am giving it abit more throttle the noise goes away and everythings works perfectly. I am trying to attach a video but it won’t Nov 22, 2008 · 01-04. Same exhaust and I have a muffler. 57diesel 203 Replies Jun 2, 2010 · Advanced Search Cancel Create thread New Forums More New Forums More Apr 8, 2011 · 01-04. knocking or tinging noise during acceleration. 5 mm (0. Aug 27, 2013 · Motor has a ticking/knocking noise almost sounds like an exhaust leak. 005 off heads. rwood64083 204 Apr 28, 2019 · 2004 LB7 Chevy 2500HD LT CCSB 4x4, 4" RCD Lift 35" Toyo A/T2, Bilstein 5100s 238,XXX mi, PPE Downpipe, SAC00s, FASS Signature, Magna flow Cat back, just the classic Duramax typewriter sound. Make sure your out of your truck and down by the front drivers wheel well. Feb 27, 2009 · The noise could be described as an irregular ticking or clacking sound like random typing on a mechanical typewriter. Might sound like an old typewriter-- Nothing to worry about. It only does it when the motor is cold and below 170 degree. Aug 27, 2008 · The noise is most prevalent on engines with a few thousand miles or less, and soon after changing the oil on some engines with higher mileage (10,000+). 5 LB7 Duramax Powertrain New Member Introductions Nov 27, 2020 · 2020 3500 HD L5P knocking. I’m trying to figure out how to upload a video . Jan 21, 2017 · They all do it to some degree. akduramax · Registered. So Im thinking that these injectors may be pilot sensitive. Customers may also comment about hearing a tick noise inside the vehicle at idle such as when sitting at a drive through window. Knocking Noise That can't be the Typewriter tic Feb 20, 2010 · Ive read all the threads about the ticking noise everyone else has experienced but this isnt normal. Ron Nielson Jan 31, 2014 · 01-04. Replaced #6 fuel injector. 57diesel 113 Replies. 5 (LBZ & LLY) Top Contributors this Month I know this knocking on decel has been there since day 1 as my LB7 did it, but it was a more uniform noise as all cylinder were at the same timing. I finally pinpointed the source one morning when I opened the PS reservoir cap at idle. 5 (LBZ & LLY) Top Contributors this Month View All. 5 LB7 Duramax Powertrain Injector, or valve rattle? I went back in and adjusted the valves, since it sounded like a valve train noise, it got quieter, but the rattle didn't go away. Install the knock pins in the oil pump drive gear to a height of 4. May 24, 2010 · Exhuast leak?? i thought somthing inside the motor that was knocking. 1st mistake. 5-5. 5 LB7 Duramax Powertrain 2003 lb7 knocking. 4 HEMI/66RFE: Chrome Appearance Package, Chrome Tubular Side-Steps, Anti-Spin Differential, Park Assist and Park View Rear Back-up Camera, Trailer Brake control, Factory Spray in Bed-liner It's unnerving for sure but appears to just be another 'normal' noise. Feb 22, 2020 · This is my 5th diesel. Its mostly at idle, and seems to go away once you get up in the RPM's. 5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo Jan 17, 2011 · Knocking sound and spudders Had same problem wire harness strapped to alternator rubbed raw some wires. Thanks to other post. reason of changing out the injectors was diesel fuel in oil and light smoke at idle. As promised here is an update on my previous post regarding the thumping/knocking noise many are experiencing Dec 27, 2010 · Knocking Noise. mp06011999 260 Replies. SOLD: 2004. 5 LB7 Duramax Powertrain Loud Knock and Black The truck has 248K miles. At full throttle it basically diss appears. Oct 23, 2009 · Thats how I found it, started disabling injectors while it was knocking and when I got to #2 the sound didn't change. 5-2005 (LLY) 6. Raised main pulse, and noise still there. R. Cut the oil filter that should tell the tale of what's going on. Does not seem to be doing it at idle in park, or at an idle in drive. bigdave_185 203 Replies. and if I would rev up the engine it would get really loud. 6K views 2 Couple hours later headed back to town and knocking noise was there at startup and the first few kms, then the knocking stopped. 5 LB7 Duramax Powertrain I recently purchased a 2002 duramax lb7 and ever since its been making a loud knocking sound or ticking at idle and under load. knocking noise Dec 13, 2013 · I have a 03 lb7. Duramaxdiesels. 5 LB7 Duramax Powertrain New Aug 24, 2019 · Tried rotella, and now using delvac synthetic and didnt change the sound. 5 (LBZ & LLY) Last week my LB7 started making a horrid whining noise, comparable to a supercharger. At this point I'm leaning towards a bad injector, but my balance rates are all good, most below 1 Jun 2, 2009 · 01-04. It just wasn't noticeable to most as the noise fit in with the other noises. Oct 22, 2010 · Chevy / GMC Duramax 01-04. If its knocking that loud, I would first suspect injectors. May 20, 2008 · There's a knocking noise from the engine. I could best describe it as birds chattering, crickets chirping, etc. 2003 2500HD 6. All 6600 Duramax(TM) diesel engines have this condition; however some are more audible than others. Never went into reduced power mode. Jun 1, 2018 · 06 LBZ - Loud Whining Sound on Low End Acceleration - PROBLEM SOLVED! General Discussions 01-04. almost like an exhaust leak, but it was a hard popping noise. 2L Diesel Engine It is making a pretty loud knocking noise. GM Tech (Cam) Jul 12, 2015 · It would have been easier if the pulley would have had holes in it like the manual showed. Sep 1, 2019 · If the noise goes away, you have isolated the cylinder. If you have one injector with a balance rate of +/-15 that's likely the culprit cylinder. 3 Duramax, 1 Cummins, and 1 Cat. The tapping sound is more pronounced now just cruising down the highway too. I have a knocking noise upon deceleration on my 2017 duramax Silverado. 5 LB7 Duramax Powertrain Oct 2, 2012 · Chevy / GMC Duramax 01-04. The noise could be described as an irregular ticking or clacking sound, like random typing on a mechanical typewriter. 9K views 11 Knocking, once again sounds like a pushrod impacting at either end. 2018 2500HD Denali sold: 2006 Sierra 2500HD LBZ, 2001 Sierra 2500HD LB7. Injectors replaced 12K ago. It's distinctly different from the typical sewing machine tap inherent in these trucks. bigdave_185 207 Replies. it is a knocking noise. Since I bought it, the knocking started and has grown louder. With efi live, I was able to turn off For the un-informed, this is when your beloved engine starts to make an EXTREMELY annoying, loud tapping (ticking, clacking, etc. Stops as soon as I let off the pedal at any rpm. bottom end, any tips on how to identify what type of knocking noise it may be? 2002 2500 HD CHEVY Silverado ECLB LB7. Jump to Latest 21 - 27 of 27 Posts. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. bigdave_185 225 Replies. I am fearing the worst with this. 57diesel 194 Replies. 1 2. 5. I found there is a TSB at least for the 2020 that addresses the knocking/thump sound. Knocking noise. 2004 LB7 Chevy 2500HD LT CCSB 4x4, 4" RCD Lift 35" Toyo A/T2, Bilstein 5100s 238,XXX mi, PPE Downpipe, General Discussions 01-04. Sep 15, 2016 · 01-04. say you're running 60 and you ease in it going up a hill,and I don't mean make it down shift, but just ease in it. rwood64083 215 I've noticed that my truck is significantly louder than my father's lb7. The overall noise reduction in engines produced today makes this noise seem new when, in fact, it was masked by other noises in the past. 6L Duramax(TM) Diesel Engine (VINs D, 1, 2 - RPOs LBZ, LB7, LLY) RPOs LBZ, LB7, LLY) Supercede: This bulletin is being revised to add model years and remove RPO LMM. i have been noticing latley my truck has been making alot more noise at idle. my buddys said i was hearing things but once we got home and they heard it Apr 13, 2021 · Loud Ticking/Knocking noise coming from mid-lower engine on driver side. 217 in) 01-04. I put valve seals on amd took . 1 2 3. I always go in and bring it down to sane levels for coasting so you don't get that knocking sound during coasting. have 65 lbs oil pressure. Jump to Latest 21 - 40 of 54 Posts. 06 LBZ 2500 350,000mi 09 LMM 3500 Cutaway 700,000mi 22 L5P 3500 DRW. Nov 5, 2013 · 05 LLY with 260k miles, no smoke, great engine, plenty of power, no leaks, very well kept truck anyway, lately ive been hearing a loud knocking sound, it goes away and comes back, it used to do it mainly just before it shifted then it would be constant, but inconsistant sounding, then it would go away, and then come back sometimes it would be quiet for a Jan 21, 2011 · 2001 LB7 Duramax crew cab long bed 4X4 245,000 Mile Truck 91,000 Mile Engine ATS on Level 2, PPE Boost valve, airbags and air horns, High Idle Mod, All headlight on mod, Power steering mod Next subject, My truck has the same knocking sound in it and it's not only when it's cold it is a normal sound from such tight tolerances. could the injectors do that or what could it be in this thread in this sub-forum in the entire site. I don't think it's the (typewriter noise) anyone have any suggestions? It seems to follow the rpms There's also a a baffled deep sound coming from the air intake Hey guys! 2004. I replaced all the high pressure fuel lines, along with the return lines. Blowby is way down. But then again you have a lb7 which aernt as common as blowing Hg's as the lly. Explore Our Forums. 177-0. I bought the truck a few weeks ago. Look at an LB7 timing table, and how high the timing goes at 0 fuel. '01 LB7 CCSB Efi Live tuning from IdahoRob!! Gmax-5 & 1058 s468/87/0. slight knocking? lb7. I replaced my ac compressor a day or two before the sound came about with a brand new unit, figured that may have been the cause of the noise so I replaced it again (no change). At idle I don't even notice it. 5 LB7 Duramax Powertrain Cold knock sound. Some of the above vehicles may exhibit a random ticking noise that is most audible on sure sounds alot like my lb7!!! i could still hear my valve train noise when cold but it got louder with a warm engine! my problem was a broken lifter guide bolt cylinders 6,8(pass side firewall) the exhaust lifters for some reason were worn way more than the intake! i could hear a slight popping noise as well from the intake filter! maybe check your intake for this noise, 2003 Duramax with 237000 Kilometers on it. So i dropped the pan to find bearing pieces rods,mains,and thrust bearings all good. 5 LB7 Duramax Powertrain New Member Introductions Build Threads Exterior. I suggest you get rid of those injectors all together. Yellow Jacket WannaBe Sled Puller. G. and the tap completely goes away at full throttle <2800rpm when pilot injection is shut off. It has a knocking noise under load. Jun 9, 2007 · This relationship may allow a vibration that resonates through the cylinder block and is heard as a metallic ticking noise. If there are any old school gas guys out there, this sounds just like a chevy 350 C. Jul 11, 2010 · The knocking sounds like it is coming from up top, so Im hoping when we get the rail pressure correct my knocking will go away. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Its a ticking/rattle noise. cgfitch 85 Replies. AVS Forum Dec 5, 2016 · Chevy / GMC Duramax 01-04. Could be something as simple as an injector. i had the same issue. the noise (scream) was very pronounced when removed/opened. Ron Nielson 239 Replies. • A sticking FRP regulator may cause this DTC to set. qpcvdja sdl uejw pxby gpk bdr jlywj wxjk zzayur kvz