I agree with RC on this one.  I bought a coolant system pressure tester
from Sears (Craftsman) and I love it.  Pressure test and bleed the
coolant system without the van running!  Awesome!  It lets us know that
when a van leaves here there are no coolant leaks large or small.  It
was under $100.  The only thing I had to do was to fabricate an adapter
for the Vanagon expansion tank.  We did this by taking an old expansion
cap and then cutting it so that only the part with the threads were
left.  You screw this ring onto the tank and then clamp the tester onto
it.  Works great!

We usually pump the pressure up to 17 psi and then let it sit.  If there
is a weak point in the system you will hear hissing, the pressure will
start to drop and there will be leakage.  Do it cold as this is
everything at it's loosest.

Hope this helps,
Ken Wilford
John 3:16

Robert Cardo wrote:

>Would you like to locate the weakest area in  your cooling system fast?
>
>Chase down a Snap On dealer and purchase a expansion tank adaptor, and
>the testing pressure pump.
>
>Best and fastest way to a resolve.
>
>I have this set up and t will find the leaking, or weakest point in the
>cooling system very fast, and efficiently.
>
>There is no better way to accomplish what you have to do.
>
>RC
>
>
>