In your case it will probably be relatively easy to check this - just unplug
the injectors on one side. No fuel, no combustion. No combustion, no HC.
However I don't rule out leakage from both sides - fix one, the other will
start to blow. Do both at once.

Coby

Valley Wagonworks
"Intimately acquainted with VW Vans since 1959"

Volkswagen Bus, Vanagon, Westfalia and Eurovan
Repair and Service Specialists

1535 Sir Francis Drake Blvd., San Anselmo, CA 94933
Voice:(415) 457-5628
Fax: (415) 457-0967
http://wagonworks.com
mailto:contact@wagonworks.com

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of jmatchet
> Sent: Saturday, June 12, 1999 8:14 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Fw: Which side has internal Head leak...air being blown into
> cooing system
>
>
> -
>
>
> >Can one tell by the condition of the spark plugs, which head has a leak?
> >I have airbubbles blowing out my coolant system...really bad..and some
> >coolant in my oil.
> >High pressure oil sensor goes active after 2000rpm also
> >
> >I pulled the plugs and the passenger side has one of the plugs
> crystalized
> >with an orangy substance over its center electrode. The other on
> that side
> >is not crystalized, but is brown orange in color.  (I use have been using
> >Orange phosate free coolant).
> >The other side appears to have plugs more carbonated and darker.
> >
> >This is my Vw's third time in 8 years, and is on its second engine.
> >Thanks in advance ...
> >
> >John
> >
> >
>