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  1. #1

    shop manual piston clearance wrong???

    Hi just to know what you guys are using because I think the numbers on the shop manual are wrong chek it

    ///////////////0.024 to 0.056 mm
    new nominal .0009 to .0022 in wow thats insane!!!

    service limit 0.090mm 0.004in ????


  2. #2

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    I think the best clearance 0,08 mm

  3. #3
    Juan's Avatar
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    Quote Originally Posted by JRT View Post
    Hi just to know what you guys are using because I think the numbers on the shop manual are wrong chek it

    ///////////////0.024 to 0.056 mm
    new nominal .0009 to .0022 in wow thats insane!!!

    service limit 0.090mm 0.004in ????
    Yes i got a set off new cases and they were .0022 so i hone them out to .0025

  4. #4
    I need to know the max clearance used in real life because I have a cylinder with .008in what U guys think?

    if I need to rebore the manual says that you can overbore only the damaged cyl without any aditional mod someone has test it??

  5. #5
    The max clearance spec is .0039. The piston diameter spec new is 3.9350-3.9360. If your pistons are really worn you may be able to go with new pistons and a honing and be ok. At .008 you will likely need to go first over. With higher boost you will want to stay at the upper end of the clearance spec...around .0025.

    Mark

  6. #6
    Quote Originally Posted by Mark S View Post
    The max clearance spec is .0039. The piston diameter spec new is 3.9350-3.9360. If your pistons are really worn you may be able to go with new pistons and a honing and be ok. At .008 you will likely need to go first over. With higher boost you will want to stay at the upper end of the clearance spec...around .0025.

    Mark
    very helpfull info thanks! you have ever tested an engine with only one cyl overbored?? the manual says you can do it but...

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