Lifter noise
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Lifter noise

  1. #1
    Bass Lake Dream'n "Flat" foot'n's Avatar
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    Default Lifter noise

    My buddy has a 2003 Chevy Silverado with the 4.8 litre v8 in it. He has 106k easy well maintained miles on it. On cold starts it now has a very loud lifter noise that lasts for a few minutes then goes away. Anyone one have this happen and what did you do to fix it? How hard is it to work on these new generation Chevy engines. Any special tools needed to do this?
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    Senior Member JakeC.'s Avatar
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    check to see if it is getting coolant intermix in the oil. check the oil and pull the oil fill cap off and see if there is any moisture on it. if so the truck could have castech heads on it wich have poris castings and leak small amounts of coolant into the oil and will cause the lifter issue on start up. if so the heads need to be replaced. im in the a.v. if you need any help. otherwise those engines are pretty solid.

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    My 2007 Chevy 5.3L POS has done this since new. Dealer and my mechanic said that they all make this noise intermittently on cold starts. I am just glad it's a company vehicle otherwise I would be driving a Ford.

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  6. #4
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    Mine was doing the same thing when it was brand new. Dealer had it for a day and said it was common and a non-issue.

    Right at 100k it dropped a valve, coughed it back across the intake, and wiped out a total of 3 holes. Collateral damage in less than 2 seconds.

    new crate motor installed, now with 20k, has never made the noise the old one did. They must've found something in between the production of the two motors

    Just offering up my experience, dont really have any good advice for ya.

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    Senior Member EVILFORCE's Avatar
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    Might try the o-ring on the oil pump pick up tube and be sure it has the right oil filter.
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    in the works MAD GREEK's Avatar
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    its defiantly a lifter issue..
    we are pretty much at the point at what do we need to do this job. Any specific tools or gaskets or sensors that we should know about?
    Any advise would be greatly appreciated.
    Thank you

  9. #7
    Senior Member EVILFORCE's Avatar
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    Quote Originally Posted by KeepItOn1 Productions View Post
    its defiantly a lifter issue..
    we are pretty much at the point at what do we need to do this job. Any specific tools or gaskets or sensors that we should know about?
    Any advise would be greatly appreciated.
    Thank you
    Look at the post above you. You will need a pan gasket and a pick-up tube o-ring.
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    Senior Member earlbrown's Avatar
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    If it has a horizontal oil filter, make sure to avoid one with a crappy drainback on it. For example a "genuine GM Delco filter" that's made in China.

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    Bass Lake Dream'n "Flat" foot'n's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    Look at the post above you. You will need a pan gasket and a pick-up tube o-ring.
    Can you elaborate a little more on this oil pump issue? Is this is a cause of the problem? Can this be done without removing the engine?
    Thanks
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    Senior Member JakeC.'s Avatar
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    if it was the oil pump o-ring the oil pressure would ready low on the gauge to. i dont think you said anything about the oil pressure being low. its probably lifter ****ed up or your getting moisture in the crankcase causing the lifter to bleed down over night and then pump back up after the vehicle has run for a min and has good oil pressure to pump them back up.

  13. #11
    Ralphs club member LSXINDUSTRIES's Avatar
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    Sure its not piston slap? Usually for the first 30 seconds - 1 minute when fired up dead cold. 4.8, 5.3, 5.7, 6.0....they all do it. The older ones do it more, especially when they get some miles on them. The dealer started coating the piston skirts, and altering the injection timing @ idle to quiet them down when cold on the later years. It typically dosn't hurt anything, just a little annoying till the pistons get some heat to them and expand. My tahoe has done it since new......it has over 170k on it now, and uses no oil Just one of those things.......at lease they dont spit the spark plugs out of the head like the fords! If it is lifters.....ive got boxes of stockers sitting around. You will need to pull the heads to change them.
    Last edited by LSXINDUSTRIES; 05-24-2010 at 07:12 PM.
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  14. #12
    Senior Member EVILFORCE's Avatar
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    Quote Originally Posted by BASS LAKE BARRON SPRINT View Post
    Can you elaborate a little more on this oil pump issue? Is this is a cause of the problem? Can this be done without removing the engine?
    Thanks
    There is a o-ring on the oil pick up at the pump. It gets old and when you let it sit overnight it lets the oil drain out of the pump and the lifters bleed down. When you start it it builds presure just fine but it takes the lifter up to several minutes to pump back up. There are two o rings. Ist and Second design. Go to the dealer with your vin and get one. Or just get them both and match them up. Be sure it is a exact match.No. You do not need to pull motor.

    edited to add. Yes. It could be a piston but most likely the o-ring. Yes I know I am good but with so little info and not hearing it myself it is hard to diag over the net. I am such a Smart AZZ.
    Last edited by EVILFORCE; 05-24-2010 at 07:49 PM.
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    in the works MAD GREEK's Avatar
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    Quote Originally Posted by JakeC. View Post
    if it was the oil pump o-ring the oil pressure would ready low on the gauge to. i dont think you said anything about the oil pressure being low. its probably lifter ****ed up or your getting moisture in the crankcase causing the lifter to bleed down over night and then pump back up after the vehicle has run for a min and has good oil pressure to pump them back up.
    i noticed a few days ago, my oil pressure at a cold start idle, flucuating between 35-40 psi. kinda weird, noticed today at 2000 rpm, oil pressure under 40 psi and i noticed on a chevy forum that motor will run around 60 psi at 2000 rpm.

  16. #14
    in the works MAD GREEK's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    There is a o-ring on the oil pick up at the pump. It gets old and when you let it sit overnight it lets the oil drain out of the pump and the lifters bleed down. When you start it it builds presure just fine but it takes the lifter up to several minutes to pump back up. There are two o rings. Ist and Second design. Go to the dealer with your vin and get one. Or just get them both and match them up. Be sure it is a exact match.No. You do not need to pull motor.

    edited to add. Yes. It could be a piston but most likely the o-ring. Yes I know I am good but with so little info and not hearing it myself it is hard to diag over the net. I am such a Smart AZZ.
    very helpful. The truck is at the dealer now getting a diagnosed. I guess we will find out in the morning, and am guessing they wont tell me anything i dont already know, thank to you guys. Hoping its the oil pump or o-ring so it will be easier and cheaper to repair.
    Keep u updated

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