I would believe it if he pressurized the cylinder(s) with air without cranking the engine. Cranking the engine could produce some bubbles by moving coolant through the system. There are all kinds of places air could be trapped. I guess if it was a steady stream of bubbles? The bubbles should continue for a while after the cranking has stopped, if his theory is true. (At least until the compresion leaks down to some point.) Why not attach an air hose to a compression gauge fitting and see if you can produce the same bubbles? I have a friend who has a similar problem. I may try this on his engine. Jay
kevin obrien <kevindobrien@YAHOO.COM>@gerry.vanagon.com> on 09/27/2002 11:27:53 AM Please respond to kevin obrien <kevindobrien@YAHOO.COM> Sent by: Vanagon Mailing List <vanagon@gerry.vanagon.com>
To: vanagon@GERRY.VANAGON.COM cc: Subject: Test for Bad Head Gasket....Please advise.
Hello All: Anyone following my threads about my 1990 Carat overheating uphill knows I've been trying to figure this out for awhile. I took her to a guy this morning that said he had a simple test...he removed the Expansion Tank cap...pulled the coil off the rotor and had his assistant turn the engine over. Bubbles could be seen in the Expansion Tank as the engine cranked. He says that's a sure sign...bad Head Gaskets or cracked head. Is he correct? Any and all input appreciated. Thanks! kevindobrien@yahoo.com __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com
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