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Silerado Valvetrain noise

This is a discussion on Silerado Valvetrain noise within the GM Trucks forums, part of the Vehicle Specific category; I was writing just to thank you all for a thread I read on a ticking or tapping noise from ...

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    silver
    2005 Silverado

    Smile Silerado Valvetrain noise

    I was writing just to thank you all for a thread I read on a ticking or tapping noise from engine. The thread said that the oil pick-up tube has an o-ring at the oil pump, if it's damaged will cause the oil pump to send airrated oil to the first lifter causing it to tap/tick. This was exactly right and replacing the o-ring has fixed the problem completely. I can't find the thread any more though? Also a bunch of the other threads say all kinds of bull crap about this problem, is there a good way to know which threads are good and which are bull crap? Newbee.

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    Black & Blue
    '02 WS.6 / '07 Suburban

    For most of the common technical questions, the "good" threads have been stickied at the top of the applicable sub-forum.

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    silver
    2005 Silverado

    Pajeff02, I've also got an 02 Z-28 so we both have similar cars! Just went over 200,000 on my Z-28 and 240,000 mi on Silverado. Chevy strong!

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    '02 WS.6 / '07 Suburban

    ^^ Very cool! Keep up with the maintenance and these engines will go a long way. Our Suburban has 108,000 on the clock and the Trans Am is at 80,000 or so now.

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    Quote Originally Posted by Cool Runnings View Post
    I was writing just to thank you all for a thread I read on a ticking or tapping noise from engine. The thread said that the oil pick-up tube has an o-ring at the oil pump, if it's damaged will cause the oil pump to send airrated oil to the first lifter causing it to tap/tick. This was exactly right and replacing the o-ring has fixed the problem completely. I can't find the thread any more though? Also a bunch of the other threads say all kinds of bull crap about this problem, is there a good way to know which threads are good and which are bull crap? Newbee.
    If you have the M code motor AFM it is the AFM lifters. There is a tech bulletin out from GM. The O ring thing is a problem but AFM lifters are the weak point eventually.

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    silver
    2005 Silverado

    The IT guys at my work just seem to have blocked me from accessing this site at work so I need to write from home on a kindal which is a little bit of a Hastie. My ac compressor went out last summer on my camaro but I limped through the summer without it, no small feat out here in the desert of CA with temps up to 105 a few times! . I got a new one on line but haven't put it in yet, better do it before it gets hot again. I previously replaced the evap/dryer but the compressor just is worn out. I plan to pull/replace the expansion orifce when I do it and if I find a bunch of crud on the orifice probably my should do the condenser too, right?

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    Yes. If the system is crudded up you will be pulling it back apart before too long. You can try to blow out the condensor and see what you get...

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