The difference between the cylinders should be within 5 psi of each other. The
high readings are a concern but it is probably excessive build up of carbon in
the cylinders. You can try using the chemical decoker, I am not a fan of this
system, or you can remove the head and do the job right.
Hope this helps.
Dave Formstone
1960 Bugeye
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From: robert weeks[SMTP:robert@woozy.com]
Sent: March 14, 1998 13:15 PM
To: Spridgets@autox.team.net
Cc: mgs@autox.team.net
Subject: results of compression test
Hello,
I've been trying to decide whether to do a full rebuild on my engine
or just replace the bearings and leave it at that for now. Unfortunately,
I think Uncle Sam is going to want any spare cash I have come April 15th.
So money is getting a little tight for a rebuild.
I went and got a compression tester to see how the rings are and here
are the results:
cylinder #1 no oil 190lbs/psi oil 265lbs/psi
#2 no oil 175lbs/psi oil 275lbs/psi
#3 no oil 170lbs/psi oil 265lbs/psi
#4 no oil 185lbs/psi oil 270lbs/psi
This makes no sense to me as the Bently book says 120lbs/psi is the
proper reading for the 1275 series A. I took all of the measurements
twice and came up with the same thing both times.
Does anyone have any insight to these readings? I'd appreciate any help
I can get.
TIA,
Robert Weeks
Durham NC
1969 Midget
http://www.woozy.com/midget/
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