I've been shouted down on this before but my compression tester instructions
clearly state that the plugs should be removed and replaced with the gauge
one at a time i.e. the test is done with compression on all four cylinders
not just the one with the gauge in. It also says throttle wedged wide open.
PaulH.
http://freespace.virgin.net/paul.hunt1/
-----Original Message-----
From: Skye Poier <skye@ffwd.com>
To: stevejp2@juno.com <stevejp2@juno.com>
Cc: MG Nuts <mgs@autox.team.net>
Date: 23 April 1999 02:46
Subject: Re: Compression
>Word on the street is that stevejp2@juno.com said:
>> I am going to check out a 79 MGB that I am interested in buying tomorrow
>> and I can not find the values I should get in a compression test
>> anywhere. Off to get a Haynes manual later. Does anyone have an idea
>> what the compressions should be?
>
>http://www.mgb.bc.ca/reference/specs.html
>
>Compression:
>18G engines, 8.8:1, 160psi @ 275rpm
>18V engines, 9.0:1, 170 - 195psi @ 275rpm
>
>Assuming the compression ratio is stock. Pull all the plugs before
>you check, btw. Might want to adjust the valves too.
>
>FYI my '66 B gets about 145-150 psi and runs very well.
>
>Low readings in both cyl 2 and 3 generally point to blown head gasket
(cheap)
>or cracked head (expensive). Usually accompanied by clouds of white
>smoke from the tailpipe.
>
>Skye
>
>--
>1966 MGB The MGB Experience __,__\__ Safety Fast!
>GHN3L-70307 http://www.mgb.bc.ca/ (_o____o_) MGOFR 1.375
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