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RE: Compression test how to

To: "'triumphs'" <triumphs@autox.team.net>
Subject: RE: Compression test how to
From: "Randall" <tr3driver@comcast.net>
Date: Mon, 15 Aug 2005 22:12:39 -0700
> And I would guess that you would start it up without a squirt of oil in
> the cylinders as well!

No, if it's been sitting for a long time, I would squirt some penetrating oil
in, and wait for it to penetrate down into the rings.  In fact I did this just a
couple months ago, fired up a TR3 motor that had been put away wet 30 years ago.
Sounded really sweet, too.

But I didn't bother doing a compression check before I got it running, either.
I still fail to see any use in such a test, unless it shows almost zero pressure
in one or more cylinders.  Otherwise, I would just assume a ring or valve was
stuck, and start the engine anyway to see if it came loose on it's own.  No
sense in doing a test whose results I intend to ignore !

I still haven't run a compression check on that TR3 motor, and probably won't
until it's first tune-up after I get it running.  IMO it's most unlikely that it
could run as well as it has already and still have significant compression
issues.  I'll run a compression check just as a baseline to compare against
later, if it does start running poorly.  This is not a race motor, I don't care
if it's down a couple percent on power.

Randall




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