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  1. #11
    steffi69's Avatar
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    Someone know what are the good compression numbers?

  2. #12
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    Quote Originally Posted by steffi69 View Post
    Someone know what are the good compression numbers?

    You should be easily 130+

    Get another gauge to verify.

  3. #13
    steffi69's Avatar
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    I have put a little of engine oil in the sparkplug hole and do a pressure test , with oil i can see 130/135 psi

  4. #14
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    Quote Originally Posted by steffi69 View Post
    I have put a little of engine oil in the sparkplug hole and do a pressure test , with oil i can see 130/135 psi

    You should be getting those kinds of numbers with the engine warm from running on its own. Adding oil is a cheat, just tells you you have a ring seal issue.

  5. #15
    steffi69's Avatar
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    Quote Originally Posted by ptscon View Post
    Quote Originally Posted by steffi69 View Post
    I have put a little of engine oil in the sparkplug hole and do a pressure test , with oil i can see 130/135 psi

    You should be getting those kinds of numbers with the engine warm from running on its own. Adding oil is a cheat, just tells you you have a ring seal issue.

    Yes i know that I should get those numbers with no oil, but like this i know i have a ring issue....


  6. #16
    steffi69's Avatar
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    Hi, just take another better compression tool,
    1-120 psi
    2- 90 psi
    3- 90 psi


    Leak test say that air go out of the engine by the oil catch can tube...

  7. #17
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    looks like bad exhaust valves and seats do a leak down test to confirm

  8. #18
    steffi69's Avatar
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    Hi, leak down test say that i have bad piston rings on 2 cylinders.
    Do i need to change piston and rings or just rings?
    i can t use aftermarket pistons, only oem in thé class that i run...

    what at il think to do is to remplace :
    -rings
    -all engine bearings
    -all engine gaskets
    -valve Job and check for seats and guide
    -Upgrade valve train(springs only)
    -Upgrade flyweel bolts

    What do you think ?
    Thx

  9. #19
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    Depends on condition of cylinder and piston. Need to take some measurements.

  10. #20
    steffi69's Avatar
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    Hi , What is the Best tool to use to hone my cylinder? 320? 400?
    I have to order thé tool but I do not know what size. ..
    Thx for help

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