A negative pressure I can understand. This would undoubtedly be a clogged
vent in the cap. Maybe caused by a cork gasket in the cap which is too
thick.
But a *positive* pressure? This too could be a plugged gas cap, but I
don't understand how positive pressure could develop except by the gas
expanding thus expelling air.
Regards,
Lew Palmer
lew.palmer@uci.com
----------
From: mgs-owner[SMTP:mgs-owner@autox.team.net]
Sent: Saturday, February 10, 1996 12:44 AM
To: mgs
Cc: british-cars
Subject: Gas tank pressure on MG TD
The gas tank on my TD develops positive pressure. I get quite a whoosh
when
I open the cap. Is this normal? Is there a vent hole clogged somewhere?
I
don't
understand why the pressure doesn't vent out through the carburetors. Any
thoughts? (The car is sitting in the garage, not quite ready to drive
yet.)
Bob Donahue " 50s FOREVER "
rdonahue@holli.com
1953 MG-TD under restoration
1971 MGB
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