I had his problen also I replaced the coolent tank top with the new blue
style and my problem went away.

Darren

-----Original Message-----
From: tmiller [mailto:tmiller@VCMAILS.COM]
Sent: Wednesday, September 01, 2004 8:39 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Need help diagnosing a coolant issue

Did you put new heads on the engine or reseal the old ones with new
orings and gaskets?  If you have the old ones on there, one or both may
have cracks that are allowing exhaust to enter the cooling water jacket
in the heads.
Tom Miller

Zoran Mladen wrote:

>Hey folks,
>
>Have a strange coolant issue going on with an 84 that I could use help
diagnosing.  Sometimes, after driving and parking the vehicle, there is a
gurgling in the back, and you see large bubbles coming into the main coolant
tank, which forces coolant into the fill tank until it overflows.
>
>This only happens on occassion.  Is this a head issue?  I just replaced the
head gaskets and all o-rings, so I'm sure its not that.
>
>I was also wondering if there could be a problem with the radiator.  When I
had the engine out, I noticed the metal coolant pipes were in bad shape, so
I cut out the rear most portion and replaced them.  I'm wondering if perhaps
rust chunks made their way into the radiator and are causing the problem.
>
>Any help in diagnosing the problem is greatly appreciated.
>
>Thanx folks!
>
>
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