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Thread: Cossie compression 0.5mm 4x4 pistons on 2WD head

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    Cossie compression 0.5mm 4x4 pistons on 2WD head

    Like the tittle sugests, I've got 0.5mm 4x4 pistons on 2WD head.
    I'm sure I have it too rich and was a bit worried about bore wash.
    Just checked the compression and got 120psi on all cylinders on a cold test. Did the wet test and it jumped to 140psi.

    Is this ok for oversize 0,5mm 4x4 pistons on a 2wd head? The compression ratio is lower from what I know.
    Is it time to go open heart surgery or it should last a bit longer?

    Thanks. André

    www.neon06.com

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    Re: Cossie compression 0.5mm 4x4 pistons on 2WD head

    warm the engine up and do the compression test again

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    Spanner Monkey

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    Re: Cossie compression 0.5mm 4x4 pistons on 2WD head

    Hi Graham

    Any idea what I should be getting with the 4x4 pistons on the 2WD head with it warm?

    I'll try to do the test next weekend I don't have the car with me right now. It's getting a new clutch

    www.neon06.com

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