sdlomi2 wrote:

> "BOB URZ" > wrote in message
> ...
>
>>I had previously posted last year on the problems i had with my
>>96 2.2 Chevy S10. To recap, the tensioner on the cam chain broke
>>and allowed the chain to jump time. I took the head off and found
>>8 bent valves. I had the head into a machine shop, had it cleaned,
>>decked, and 8 new valves and seals put in it. I had someone else
>>put the head back on at the time. The truck started and ran OK
>>after all this.
>>
>>Now, here's my issue. At About 3000 RPM+ or so i hear what appears to be
>>lifter noise from the engine. I cannot really detect
>>it at lower RPM's. And i can raise the throttle in park to this point
>>and hear the noise also.
>>
>>So, my question now is what this noise could be? I did not remember
>>hearing it before all this happened. My thoughts are maybe:
>>A lifter mount not properly screwed down? Bent push rods maybe?
>>I know this engine had piston slap issues and i heard them before
>>this happened. But it really does not seem to be the same noise.
>>Any thoughts? What would be the result of a bent push rod?
>>
>>
>>Bob
>
>
> Get a mech to listen & check for rod-bearing noise. s
>
Its coming from the top end. I know what pre detonation noise is
and its not that. And its peaky like a resonance only above a certain
RPM. It almost sounds like something loose sympathetically vibrating,
but i a fairly sure its somehow valve train related. Ir does not have
that lower sound of lower end rod/bearing noise.

Back to the original questions:
If the push rods were slightly bent, what kinds of symptoms or noise
If the rocker arm nuts were slightly loose?

Bob


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