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Thread: Z20LET Compression Specs

  
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    Narbar_123's Avatar
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    Z20LET Compression Specs

    Hi, i was just wondering what the compression readings should be on each piston for the z20let as im going to do a compression test on my car, if anyone knows the specs in psi i would be really grateful! thanks for your help
    Black Astra Gsi "Turbo Technics Turbo, Front Mounted Intercooler, No Cats, Remap and K&N Air Filter"

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    montyfox's Avatar
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    I'm not sure but I'd be looking for 175PSi minimum as pretty decent, if there is too much variance between the cylinders, you have problems.

    I'll have a look through some notes and post up if I find anything.

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    TurboManiak's Avatar
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    from 160 to 200 psi

    PS. Just for refference mine has 80k miles done and reads 180s psi
    The only way to be 100% certain that work has been done properly is to do it yourself.

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