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Engine knock

This is a discussion on Engine knock within the Internal Engine forums, part of the LSx Technical Help Section category; I have an '02 with 13k miles and I seem to have this classic "lifter knock" coming from the engine. ...

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    Member slade8200's Avatar
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    Question Engine knock

    I have an '02 with 13k miles and I seem to have this classic "lifter knock" coming from the engine. The noise is there when the engine is cold and warm. I noticed this article here http://www.rjsmith.com/gm-1206539.html#top and it says a problem about an oil pump o-ring being bad. I searched on here and only found a couple threads about this issue but no real answers. How many people have this from the factory? Changing it doesn't seem like a bad job but I want to make sure it's not really a bad lifter. But I can't seem how it can be. Thanks.

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    Quote Originally Posted by slade8200 View Post
    I have an '02 with 13k miles and I seem to have this classic "lifter knock" coming from the engine. The noise is there when the engine is cold and warm. I noticed this article here http://www.rjsmith.com/gm-1206539.html#top and it says a problem about an oil pump o-ring being bad. I searched on here and only found a couple threads about this issue but no real answers. How many people have this from the factory? Changing it doesn't seem like a bad job but I want to make sure it's not really a bad lifter. But I can't seem how it can be. Thanks.
    I have the same problem with my car. I have 35k on my car. I would also like to know the answer too.

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    Senior Member INMY01TA's Avatar
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    Not sure what you mean by knock. I believe the o ring thing is supposed to cause a ticking sound.

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    Member slade8200's Avatar
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    Ticking, knocking...whatever. It's a sound like that. Is piston slap a myth on these engines?

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