Low engine compression, or is it?

[JShadzi at aol.com]

Hmm, yes, that is a little concerning, with leakdown like that your motor may only last another 100k miles...  =)

My ex-coupe GT just went to its 4th owner, with about 350k miles on the original bottom end, it still pulled in an impressive $2800!

Drive it and enjoy it, you are fine, its an Audi motor.

Javad
80tq.com

In a message dated Fri, 22 Jun 2001  2:53:36 PM Eastern Daylight Time, "Chuck Schott" <schott at abam.com> writes:

<< Greetings Listers,

Per repair shop yesterday, the compression on my 4kq is 155psi(40psi
leakdown) on the #1 and 120psi(20psi leakdown) on the rest.

They say I'll need a rebuild "before long" but could not really provide any
elaboration, hoping you can.

Although these values are less than the normal range of 130-174, they are
still above the minimum of 102 psi.  I guess I thought that this would be in
the range for what you would expect after 165k miles, Or is major engine
work really just around the corner?
Is it a given that rings and/or valves would be at fault or could it be my
leaking head gasket?

I'd like to recheck the compression but have a couple of questions if any of
you could help out:

Should I crank until pressure stops going up, or just for a certain number
of cranks?

Can I check "leakdown" with a basic compression gage (pressure release
button on side)?  How long do I wait?

TIA,
Chuck



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