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piston slap question

This is a discussion on piston slap question within the Internal Engine forums, part of the LSx Technical Help Section category; I have a 2000 ws6 m6 with 75k on it i am in the process of rebuilding the engine because ...

  1. #1
    Junior Member slpws6ta's Avatar
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    piston slap question

    I have a 2000 ws6 m6 with 75k on it i am in the process of rebuilding the engine because the piston slap ( or what i belive to be piston slap) has become unbearable. i will know soon enough what the noise is for sure but is there anything i can do, short of a resleeve and pistons, to get rid of it if it is piston slap. I am an auto tech and i do all my own work but i work for toyota usually if i get a car with piston slap I pull the head and the cross hatch is worn out of the cyliders at which time it gets a short block. I'm going to be ordering a cam kit, clutch, flywheel, 4.10 gears and such but if i cant get rid of the piston slap I want to know so i can order a bare block. Any input from any one who has been through this would be greatly appreciated thanks

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    Senior Member Danger731's Avatar
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    seems it does not hurt the LS1 motor so no one tries to correct it, do a search.

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    Junior Member slpws6ta's Avatar
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    i have done extensive research and motors with piston slap have short "life expectancy

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    Junior Member slpws6ta's Avatar
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    shorter not short

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    Pewter
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    It is my understanding that piston slap was due to the short skirts of the pistons and weak rings. Replace the pistons and your motor will quit slapping.

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    That's what I meant

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    There was a piston update in the spring of 01, which included coated pistons. Are you using these in the rebuild? If you have it down that far, have you considered a forged bottom end? Might not get rid of the slap (forged pistons require a bit more cold clearance) but it would be a lot stronger.

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    Slower Than a 3rd Gen juiced99ws6's Avatar
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    Quote Originally Posted by willing to race View Post
    It is my understanding that piston slap was due to the short skirts of the pistons and weak rings. Replace the pistons and your motor will quit slapping.

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