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To: "'Shop Talk List serv'" <shop-talk@autox.team.net>
Subject: Re:
From: Douglas Shook <shook@usc.edu>
Date: Fri, 06 Aug 1999 13:55:11 -0700
Hi Brian,

Normally in a situation where you have low
compression, I just:
- warm the engine
- take a compression reading
- squirt some 30 wt in the spark plug hole
- take a second compression reading

If the compression goes up, you have bad/broken
rings.
If it doesn't go up, you have leaking valves.

In your case with 0 compression, you probably have
either a hole in the piston or a valve stuck
open.  If you just pop the valve cover, roll the
engine over and look for the valves stems on that
cylinder to move.  If one does not move, or does
not come back up to the same height as the other
valves, you know you have a stuck valve.  If they
both are moving normally, you probably have a hole
in the piston.  If you have a hole in the piston,
you should be smoking like smudge pot.  My guess
is a stuck valve if you are not smoking.

Regardless of the situation, you are going to need
to pull the head off to fix it -- might just as
well get a head gasket and go at it.  :)  Not a
bad job at all on this engine.

good luck!

doug

just take out the plug and squirt some motor oil
in the spark plug hole

--
----------------------------------
Douglas Shook, Ph.D.
Clinical Associate Professor
Information & Operations Management
Marshall School of Business
Bridge Hall 401F
University of Southern California
Los Angeles, CA 90089-1421 USA
Tel: (213) 740-6818
Fax: (213) 740-7313
email: shook@usc.edu



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