Lb7 Duramax Knocking Noise. I noticed a ticking/tapping noise after my last oil change.

I noticed a ticking/tapping noise after my last oil change. And no, you shouldn't hear any sort of tick (except where mentioned below), tap, knock, or otherwise while accelerating. 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 Subject: Duramax Diesel Pilot to Main Injection Fuel Knock Noise Models: 2001-2005 Chevrolet Silverado, Kodiak 2001-2005 GMC Sierra, Topkick The following diagnosis might be helpful if the My LB7 daily has developed a knock at idle and low rpm. 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. I have a knocking noise that appears to be in the front left of the truck. looks like my converter is about to fall off! Could it be a broken flex plate or just bolts come out? with 6. Load meaning if I'm cruising down the highway at a slight Well driving home tonight on the freeway I noticed my truck sounding a little different than normal, well when i got off the freeway and it went to an idle it sounded horrible, sounded like a nasty Under load my truck makes a tapping/knocking sound at 1800 to 2000 RPMs. As soon as i heard this i started to research it and what i found about the duramax tic I have an 03 duramax that has an engine miss and smoke. I quickly shut i have an 04 lb7 and just started noticing a knocking or tinging noise under acceleration on the drivers side. It has 124K miles and doesn't seem to have ever been off road. We strive to keep this the #1 forum for tech and information The noise goes away when the truck is at idle and is very minimal when the cruise is set at any speed. In park at about 1,500 RPM I hear the knock. In gear it is noticeable as well when the RPMs break We know today LB7 injector failure is a common problem, and because the operating tolerances inside the fuel system are so tight, proper Customers using the fifth gear inhibit switch may notice the transition noise at speeds around 107 kilometers per hour, or 67 miles per hour. It doesn't sound as violent as a hung open injector, but maybe a much more mild version of that. believeCustomer: I have a duramax 2004 with a LB7 motor in it. I’ve got a thumping noise coming from my air box that started randomly the other morning. Had GM replace all injectors 14 months ago. However the motor has developed a loud knocking noise. I checked the balance rates with my v2 and one was 1. If you know your oil pressure gauge is properly working and you have shit pressure I've got one injector that's knocking on the driver's side. 9K views 4 replies 3 participants last post by Lb7Al Apr 21, 2022 Lb7Al Discussion starter When my injectors went in my lb7 i noticed a DRASTIC drop in oil pressure due to the diesel fuel thinning the oil. I'm pretty positive it's an injector anyhow, as it only does it under "load". The exception is the typical duramax typewriter tick. The noise is not real noticeable when the engine is cold, but gets worse as it warms up. When the noise first Yeah see I was thinking it could be a fuel knock but the noise comes through the air intake Ok I've been lurking around this site for a while now reading everything I can about this weird noise coming from my engine. This sound is considered normal, and no repairs should. . For some reason my phone picked up the sound better than I can hear it sitting in the driver seat. i cant really tell much of a sound I replaced injectors and CP3, found that I was getting fuel in oil, and had to go back in to replace the leaking injector. 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 I have often heard folks reporting ticking/knocking sounds, and using that as search terms here and on google would be helpful. 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 Any codes with this issue? What kind of aftermarket injectors? 02 4x4 GMC 2500HD D/A. Hoping someone can help. 2 in gear and warm with the rest below one. reason of changing out the injectors was diesel fuel I have a 2007 LBZ with 140K, and it has been knocking on and off at idle and under light load. Right after I bought the truck it started knocking bad and smoking a blue smoke out of the 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. any other ideas? Anyway, I stopped by my local performance shop that specializes in Duramax's who also happens to be a client of mine. I can I have a 2003 duramax, just recently put a 2002 lb7 engine in place of the blown 03 lb7. I quickly shut it off, but wanted to capture the sound to post here. The sound seems to be the pilot injection or so it seems from A couple months ago I put new head gaskets in my truck, shortly after that I noticed what I thought was a valve train rattle/knock when the engine is under a load. I thought it may have been the steering rattle but I Lb7 Knocking Sound in 2004 Duramax Jump to Latest 1. also has a pulsing hissing noise audible in the exhaust. Frankly, I find my LB7 to be so darn noisy anyway, I I drove it yesterday and it was fine, fired it up before heading up to snowboard this morning and heard this knocking sound. I used the delco filter and Rotella oil. it’s a 01 Silverado 3500 lb7. It was making the 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. When I got off of the highway I noticed a rotational knocking. But yes I've run power service, lucas, 2 stroke oil. Black on black. Truck ran great for 600kms after installed with NEW injectors and headstuds, but within 600kms a 2003 duramax has knocking noise form pass side valve cover ran find when i shut it off knocks and smoking bad. Just Duramaxdiesels. any ideas? After recording the noise, it sounds pretty metallic in the video. I have got an 05 duramax with 165k miles. He took a spin in my truck with me and told me I have injector knock Figured out the noise. Just by sheer luck, the leaky one was on the first side I removed (driver 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. At i have had my 02 chevy 2500 in the shop about 11 to 12 times now over the same problem its a knocking sound more auditable from the drivers side. The old girl has 376000 plus Alright I need help. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. At idle I don't even notice it. If the engine . The load could be no more than the truck going up a hill solo, but is louder with a heavier load.

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