RE: alfa-digest V9 #203

["Michael & Carmen Keith" <mikeandcarmen@domain.elided>]

The engine should be at operating temperature for valid readings in a
compression test.  Of course, it should be dead cold for a valve adjustment.

Michael Keith
Houston, TX
'87 Milano Gold

-----Original Message-----

------------------------------

Date: Tue, 21 Jan 2003 20:36:00 -0500
From: Mark Denovich <mark@domain.elided>
Subject: Compression Test

Can I safely assume that doing a compression test on a cold engine,
particularly an engine that has sat for a few weeks, is practically
worthless?   (and by cold, I mean about 40-50F)

I was getting ready to do a valve adjustment, and wondered what I'd see
on a test.   The results were (in psi): 165, 170, 185, 210, 170, and
165.  These numbers were quite a bit more variable when I first measured
them shortly after I had parked the car...  (I lost the paper I had
written them on, which is why I thought I would do the test again.)

The engine in question is in my 164S.

	--Mark
	http://alfa.denovich.org
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided