On Nov 9, 2010, at 9:47 AM, John Mosley wrote:

> what is the easiest way to determine which cylinder is leaking
> exhaust gas into my
> coolant system?
>                    thanks
>                                jack     91 vanagon auto  gl

What's never failed me is to pull the plugs.  The spark plug that has
no deposits on it? That's your leaker. Steam is a marvelous cleaner of
combustion chambers. Every time you shut the hot engine off, coolant
is forced into that cylinder.  Start the engine and instant steam in
that hole.

Jim