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Date:         Sat, 1 Apr 2006 21:01:14 -0500
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: Air Getting into Cooling system
Comments: To: Jonathan Farrugia <jfarrugi@UMICH.EDU>
In-Reply-To:  <Pine.LNX.4.64.0604012039390.15019@galaxian.gpcc.itd.umich.edu>
Content-type: text/plain; charset=US-ASCII

Air getting into the cooling system is usually the internal gaskets failing, not the rubber outer gaskets. Inner gaskets usually fail due to an over heating event or for some reason the head studs lost the ability to hold the clamping load, (came loose). After that, the small leakage erodes the seal at the top of the cylinders and combustion gases begin to fill the cooling system. If caught really early enough, re-tourqing the heads may fix it.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Jonathan Farrugia Sent: Saturday, April 01, 2006 8:43 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: Air Getting into Cooling system

John

often people have trouble keeping the system bleed when the head gaskets are failing. try pressurizing the system with air and leave it sit overnight then look for coolant the next day.

jonathan

On Sat, 1 Apr 2006, John Connolly, Aircooled.Net wrote:

> Sister In Law's 85 Vanagon is getting air buildup in the radiator after 2-4 > days of errands. We have bled it, and know we are getting all the air out. > > The question I have is where is the air getting IN FROM? Any usual suspects? > > We did recently replace the rear heater core. > > TIA > > John > > >


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