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Re: low compression

To: <>
Subject: Re: low compression
From: "Elton Clark" <>
Date: Wed, 25 May 2005 22:06:24 -0500
Eric wrote:

> It might be worth rigging up a leak down tester to find out where/why the
> compression is low. I've done this (cheaply) by screwing in a plastic hose
> fitting

 (pipe threads on one side, hose barb on the other)

>into the spark
> plug hole. Apply some compressed air with the piston at TDC then listen
> the leak. (be careful the engine doesn't suddenly turn)  If you hear
> in the tailpipe, likely the exhaust valve is burned, intake tract = intake
> valve. Hissing from the oil fill opening is bad rings. Evidence of air in
> the cooling system is either a cracked head or blown head gasket.

Okay, I'll bite:  What kind of engine uses pipe threads for sparkplugs???
(Besides the Model T Ford, of course.)

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