Check the carbon canister and the hoses going in/out of it. The screen
that hold the carbon will often rust away allowing the carbon to clog
the vent lines.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of corey hoffman
Sent: Tuesday, March 02, 2004 5:40 PM
To: vanagon@GERRY.VANAGON.COM
Subject: fuel tank breathing?

I have noticed some clunking coming from my fuel tank.
 After I have turned off the van and run over to open
the gas cap I can look under the van and see it expand
once the cap is off.  It is an 87 vanagon, 123K miles.
 Before I decide to take the tank out to see what is
going on, is there a "simple" fix I should know about?
 Thank You, Corey

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