Date:         Sat, 14 Apr 2007 21:25:07 -0400
Reply-To:     Mike Collum <collum@VERIZON.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mike Collum <collum@VERIZON.NET>
Subject:      Re: 86 westy overheating issue
Comments: To: Bob Mac <BOBMACDOWELL@WEBTV.NET>
In-Reply-To:  <24271-46217CA3-486@storefull-3157.bay.webtv.net>
Content-type: text/plain; charset=ISO-8859-1; format=flowed

What you're describing is one of the things a leak down tester does.
Google leak down tester ... there are instructions for making your own
and their uses.

Mike


Bob Mac wrote:
> You might try this. The compression test may look good because if the
> gasket is leaking into the coolant that mean the compression is backed
> up by the coolant, hence no leak. We used this to replace valve springs
> without taking the head off but i think it will work in this application
> as well. Make an adaptor for your air chuck to fit in the sparkplug
> hole. Use an old plug and break the porcelain off and braze on a male
> end of the air chuck. Thread this into each spark plug hole one at a
> time. make sure the valves are closed in that particular cylinder then
> put the air on the adaptor. This will pump air into the cylinder and
> should force air thru any gasket that is bad. you should see air bubbles
> coming back into the coolant tank after a short while. Don't laugh try
> it.
>