I had a bad head gasket a few years ago --- or so my buddy (a 25 year VW
mechanic with a dealer) was convinced. He begged me to take it to his
favourite rad shop and have them put a sniffer on it to confirm. I did so
--- the dude in the rad shop used a sniffer all right. He opened the cap to
the expansion tank and put his nose to it. He said "yep give her a sniff" I
did and, sure enough, could smell exhaust in the coolant. Pretty
sophisticated equipment :-) Worth a sniff anyway :-)

Cheers,
Doug

On Sun, Apr 25, 2010 at 11:31 PM, Karl Wolz <wolzphoto@q.com> wrote:

> Don,
>
> I'm with Mark on this one.  If you have a friendly mechanic, he can use a
> "sniffer" to detect the presence of exhaust gasses in your pressure tank -
> a
> pretty sure confirmation of our diagnosis.
>
> Karl Wolz
>

--
http://www.dougalcock.com