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Re: compression test cold

To: "" <>,
Subject: Re: compression test cold
From: "Andrew B. Lundgren" <>
Date: Mon, 25 Feb 2002 16:49:13 -0700
Your high compress does depend somewhat on your altitude.  160 at sea
level is very different from 160 in Denver, so it depends how high you
are.  The drop in #2 seems a little high, but I don't think that would
stop you from running.

Try putting a teaspoon of oil in each cylinder and retesting.  If #2
swings way up (or all of them) then it indicates rings...  If not, then
if I am not mistaken, then it means valves...

On Mon, 25 Feb 2002 14:54:34 -0500, James Laukaitis wrote:

>      Don't beat on me too hard on this one but I have a question. I have
>the carbs off the BGT, so it won't run, but I wanted to do a compression
>test, so I did. I wanted to see if there are huge discrepancies between the
>pistons. I figure I can get a general idea. I get (in psi) 130, 115, 135,
>130 from front to back, that is radiator to firewall. The test looks pretty
>good considering. I was looking for a bad cylinder, with a large
>discrepancy (ie. 130, 125, 87, 130). I know the working compression (high)
>should be 160psi. I think I can get close to that with the engine running.
>Can I consider this pretty much valid, or am I really off base here and
>cannot count this info at all?

Andrew Lundgren

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