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Thread: Chevy 350 piston slap.
          
   
   

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  1. 03-10-2015 05:28 PM #1
    jc_davil
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    Chevy 350 piston slap.

     



    Hi, does anybody have an idea of why a 350 engine would piston slap when warm and above 3200 RPMs? Any ideas would be appreciated.
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  2. 03-10-2015 05:42 PM #2
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    techinspector1
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    Pistons installed backwards on rods. Rods installed backwards with pistons correct on rods (although this would create one hell of a problem with rod side clearance on the crankpin). One or more pistons cracked. Excessive piston to bore clearance for the type of piston used. Might also be one or more wrist pins causing the noise. Hopefully you're not mis-identifying detonation.

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  3. 03-10-2015 05:54 PM #3
    jc_davil
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    Inthe case of detonation..what could be causing it?
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  4. 03-10-2015 07:40 PM #4
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    Quote Originally Posted by jc_davil View Post
    Inthe case of detonation..what could be causing it?
    Engine Basics: Detonation and Pre-Ignition by Allen W. Cline

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  5. 03-10-2015 06:29 PM #5
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    jerry clayton
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    its probably rod knock------------
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  6. 03-10-2015 06:33 PM #6
    jc_davil
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    Engine is a reman..everything is new.
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  7. 03-10-2015 06:36 PM #7
    jc_davil
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    When cold..no noises at all. Even when I floor it. The noise starts after running for aroun 15 min under load.
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  8. 03-10-2015 07:03 PM #8
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    warrantee it-
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