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Date:         Mon, 22 Aug 2011 17:38:06 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: Coolant Strangeness
Comments: To: Tom Rowsell <86westy@GEOEXPLOITS.ORG>
In-Reply-To:  <CALz8rwP1DxeaXeiPyjtCNWTnXV-=X43Y45mLir5Cjq6WgOhbfw@mail.gmail.com>
Content-Type: text/plain; charset="US-ASCII"

You may be lucky and only have a bad radiator cap but this is a firm indication you are getting combustion gasses into the cooling system. At speed the suction from the pump is helping to keep the coolant down but as the engine slows down combined with the heat soak the coolant expands out it comes.

In a pinch you can use a regular VW pressure cap readily available, (without the overflow hose). It just vents around the cap. There will always be some expansion space in the pressure bottle but this will work fine if nothing else is wrong.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Tom Rowsell Sent: Monday, August 22, 2011 2:09 PM To: vanagon@GERRY.VANAGON.COM Subject: Coolant Strangeness

This is likely an FAQ...I'm on the road and searching is awkward with cell phone. It seems when I drive for an hour or so at highway speed, and stop abruptly (to get gas for example) coolant rushes from the left tank into the overflow one on the right, sometimes overflowing that one onto the ground. In one instance the dash light began to flicker and when I pulled over, the right hand tank was full, and the left one was down 1/2 litre or so. It's not overheating, but temperature rises at idle after a highway run. 2.1 litre, recent (last 6 months) new rad, water pump. There are no evident leaks, and oil on dipstick looks clean. Any suggestions on what to check? The needle is generally parked right at the center of the LED... Thanks Tom


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