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Thread: Chevy 350 piston slap.
          
   
   

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  1. #1
    jc_davil is offline CHR Member Visit my Photo Gallery
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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.

  2. #2
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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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. #3
    jc_davil is offline CHR Member Visit my Photo Gallery
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    Inthe case of detonation..what could be causing it?

  4. #4
    jerry clayton's Avatar
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    its probably rod knock------------

  5. #5
    jc_davil is offline CHR Member Visit my Photo Gallery
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    Engine is a reman..everything is new.

  6. #6
    jc_davil is offline CHR Member Visit my Photo Gallery
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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.

  7. #7
    jerry clayton's Avatar
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    warrantee it-

  8. #8
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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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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