Jump to content

Lifter Adjustment

mtnflyguy

Recommended Posts

mtnflyguy Enthusiast

mtnflyguy

Posted
Posted

I own a 2001 2500HD with the 6.0 engine. This weekend I will be replacing the knock sensors. While I had it opened up I thought I would adjust the lifters. When I start the engine I get a little knock or a tap for the first few minutes each morning. After about a minute or so it stops and I don't hear it for the rest of the day. I have been told that this is the lifters that need adjusting. I am just wondering if you guys agree and if so how difficult is it to adjust them? Thanks!!

496SS Enthusiast

496SS

Posted
Posted
I own a 2001 2500HD with the 6.0 engine. This weekend I will be replacing the knock sensors. While I had it opened up I thought I would adjust the lifters. When I start the engine I get a little knock or a tap for the first few minutes each morning. After about a minute or so it stops and I don't hear it for the rest of the day. I have been told that this is the lifters that need adjusting. I am just wondering if you guys agree and if so how difficult is it to adjust them? Thanks!!

 

I believe they are non-adjustable. Many of the LS engines have this rattle on start up. Suposidly it is piston slap at least in the LS1. Information I have found is that it doesn't hurt anything and I just reciently read a post where the owner switched to Penzoil Platinum and it went away.

clm7214 Enthusiast

clm7214

Posted
Posted
I own a 2001 2500HD with the 6.0 engine. This weekend I will be replacing the knock sensors. While I had it opened up I thought I would adjust the lifters. When I start the engine I get a little knock or a tap for the first few minutes each morning. After about a minute or so it stops and I don't hear it for the rest of the day. I have been told that this is the lifters that need adjusting. I am just wondering if you guys agree and if so how difficult is it to adjust them? Thanks!!

 

I suppose you mean rockers, and not lifters. The rockers are non adjustable. You can however take off the rockers and check for any excessive wear on the rockers and pushrods, then re-torque to spec. I did this on my 6.0 and didnt find anything and it didnt make it any quieter. My 6.0 at 150,000 miles is louder than any duramax ive driven. Most of the ticking coming from the valve cover area is from the injectors and fuel rails anyhow.

 

What you're hearing at startup is piston slap thanks to the short shirt LS pistons. Just run a good full synthetic oil. The LQ4 engine is why i'm buying a new truck, i cant take it anymore.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   4 Members, 1 Anonymous, 1,194 Guests (See full list)

  • Latest Articles

  • Posts

    • richard wysong
      Electrical Problem - solved

      By richard wysong · Posted

      Thanks for posting, I'm sure it will help someone
    • Brendan C
      2026 6.6 L5P oil cooler leaking oil at 4,000 miles

      By Brendan C · Posted

      New to diesel trucks. I happened to find my oil cooler leaking oil externally with only 4,000 miles on the truck. I didn’t realize this was an issue until I started researching it. Dealer is going to replace it under warranty but I’m wondering if there’s anything GM is working on to fix this issue. I’ve heard the oil filter used is the same as they use on their V6 motors and that’s what is causing the problems. Should I switch to a bigger filter or keep using the OEM recommended? 
    • Vu1can
      Seems to be Missing a lot of Updates

      By Vu1can · Posted

      So, GMCustomerService:  Judging by the Update History pictured above, is this truck missing any updates that it actually needs. If it's just for the infotainment system, the radio is working fine and no trouble with SeriusXM. and Android Auto is working fine wirelessly with my phone. Some months ago, an update notice was sent to my truck. I approved the update and it finished saying that the update was successful, but it seems that whatever that update was, it didn't actually get installed - at least not if I'm to go by the Update History shown above.   So, again, are there any updates that this truck really should have? I've checked with my dealer but they're reluctant or commit to anything and if I want them to check, they require a $200.00 fee just to check it out and then I'd have to pay for the actual update(s).    Ignorance is bliss, and if none of the updates goes to fixing any mechanical discrepancies, I'll just leave things as is.  
    • CNH-320
      Electrical Problem - solved

      By CNH-320 · Posted

      Hey everyone, I recently had an issue with my 07 2500HD GMT900. My DRL’s stay on at all times. Right front turn and right mirror turn signal indicator stay on solid at all times. By “at all times” I mean the only way to make them go off is disconnecting the battery. I tore the headlight assemblies out, tried disconnecting the harnesses to eliminate bad wiring at the harness, I unplugged the headlight switch, no change and the mirror turn signal still stayed on. My first thoughts were : Bad bulb and/or socket somewhere, under hood fuse panel bad, bcm bad, tail light or trailer wiring problem, or some random short to power in the harness.  Possibly a bad ground but unlikely. I had a big clue in the fuse panel, it had a burnt smell. I started pulling every fuse that had to do with DRL or right turn/park lamp. Nothing made the right directional turn off but pulling the DRL2 fuse made the DRL’s go out.  After studying wiring diagrams, I found that both problems had that fuse panel in common, the bcm also controls both problems but knowing the fuse panel had a burnt smell I removed and disassembled the fuse panel and found a little corrosion on the printed circuit board.  I ordered a new fuse panel from Amazon for like $260. When it arrived I installed it, and put everything back together, the problem was fixed. I figured the fuse panel needed to be replaced anyway so that was a logical place to start. Hopefully this story helps someone in the future. Regretfully I didn’t scan for codes before I did everything.
    • 2022LtTbZ71
      Service 4wd, ESC light, traction control light on, Service charging system (vehicle may stall)

      By 2022LtTbZ71 · Posted

      That stinks. I’m sitting on the side of the road right now with the same issue. Never had an issue before taking it in for the ground strap recall. Now I’m outside of warranty and they’ll probably want $200 just to diagnose what they already “fixed”. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...