Bud Rolofson wrote:
>A dry test can tell you: that you might have a faulty head gasket if two
>adjacent cylinders have low readings, or if the pressure builds up erratically
>(as you crank the engine) the problem could be burned valve seats or sticky
>valve guides.
>
>A wet test is done to help diagnose WHY your compression is low, it is not
>done
>to confirm low readings on the dry test.
>
>e.g. On a wet test, if the compression increases to nearly normal then the
>rings, piston, and cylinder (for that cylinder) are probably in need of
>service.
Is this "wet test" the same as a compression "leak down" test?
Can anyone describe how a "leak-down" test is performed and how it is
different from a "wet test" if it IS different?
I've done regular compression tests and I've got those handled just fine.
But these others have me a bit puzzled.
Thanks,
Pete Chadwell
1973 TR6
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