Coolant can leak form a lot of places and not be obvious. This includes
internal leaks. Heater core leaks are usually the most detectable of the
small leaks due to the smell and frequency of fogging windows. Pressure
testing will not always make heater core leaks obvious either. Removal and
inspection will.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
AAG - Larry Word
Sent: Saturday, January 05, 2008 9:26 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 1985 Vanagon - slow, slow water leak in my old engine

I suspect my van's rear heater core has a small leak- I add water often, I
don't run hot (unless I allow water to run low), and I do not drop any
water on driveway at rear of engine.....!

Question: How to best check out this heater core to check for
leaks.....will small seeping leaks be obvious to the eye?  Or is a
radiator "pressure test" the way to go w/ this small type leak.

Thanks for insights!

Larry
Ga.