C20LET compression results
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Thread: C20LET compression results

  1. #1
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    C20LET compression results

    I have just done a compression test on my Cav Turbo.
    These are the results
    Compression with engine at 90', dry test
    No1. 157psi
    No2. 154psi
    No3. 150psi
    No4. 153psi

    Compression with engine at 90', wet test
    No1. 160psi
    No2. 157psi
    No3. 159psi
    No4. 160psi

    No1 being timing belt end.

    Do these sound about right?
    Is it worth putting a new set of rings on?

    Cheers

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  3. #2
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    Re: C20LET compression results

    looks ok mate. number 3 looks about the worst for wear with a rise of 9psi on the wet test but all the values are very close which is good

    what i cant comment on what the values should actually be lmao. someone else will be able to tell you whether they are in the right ball park or not

    rodgerq
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  4. #3
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    Re: C20LET compression results

    pretty good results there. barely any rise in the wet test is a good indicator of nice ring seal.

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    Re: C20LET compression results

    The head has gone poures so is is being changed for a fully rebuilt one.
    So i'll leave the rings alone for now then shall i ?

  6. #5
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    Re: C20LET compression results

    How many miles have the rings got on them?
    If it's more than 70K I wouldn'd keep the old ones mate.

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    Re: C20LET compression results

    The car has got 131000 on the clock

  8. #7
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    Re: C20LET compression results

    There you go then.

    When the head's out, check out for a lip at the top of the cylinders. If you've got one, then you'd probably have to go overbore.
    If it's tiny and you don't want to shell out for new set of pistons, just brake the glaze and fit new piston rings.

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