Cold can expose cracks and other leaks - the steel actually shrinks and
distorts.

That's why they use O-ring seals. The O-rings are suppposed to expand
and take up the slack, onless they are hard and don't expand anymore.

Tom
www.towercooler.com

Sent from my Verizon Wireless Phone

-----Original Message-----
From: neil n <musomuso@GMAIL.COM>
Sent: Tuesday, December 07, 2010 2:04 PM
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Subject: Cold Temps Cause Gas Tank Seal Leak?

Hi all.

It's been colder than usual recently.

Filled tank. Made fast U turn, saw leak at filler cap. Easy fix. Days
later,
tank full, saw fuel spots as I backed down driveway. Saw fresh stains
where
I normally park.   <insert expletives>

Would cold weather cause filler pipe O ring and/or metal vent pipe O
ring at
tank to shrink and leak?

I repositioned that vent pipe this Summer, but it sealed fine for
several
thousand KM's and may still be ok.

Just want to narrow things down before I get my arms into the tank
......
again.

Neil.

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-en
gines