My wife calls me frugal...sounds better than cheap.
I built one for about $15 CND.  It has a 30psi gauge built in so I can
monitor the amount of pressure I'm putting in with my bike pump.  I
found 3 leaks the first time I used it.

Pascal 
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Tabe Johnson
Sent: March 23, 2007 1:41 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Cooling System Pressure Testing - make your own tool CHEAP!

If you're a cheap bas... uh, I mean value driven like me,
you can gut a used cap to remove the valving and attach an
air compressor or hand tire pump to the pressure tank.  Apply
your chosen pressure (I'm thinking 50PSI is NOT a good choice!)
and look for leaks.  Beats the heck out of the $50 pressure
testers for sale.

tabe johnson/87 westy