'disassembly and inspection' - that's how you diagnose a leaking rear heater
core properly. 
It's just nut and bolt work.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
AAG - Larry Word
Sent: Saturday, January 05, 2008 6:26 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.