It is very common for the rear heater core to go bad.
Jerry in AZ
----- Original Message -----
From: "Florian Speier" <groups.florian@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, March 19, 2009 6:11 PM
Subject: rear heater leakage

> detected some nasty rear heater leakage in my westy.... first I thought the
> core was bad, and it does have a little rust on the bottom, but now I bench
> pressure tested it somewhat and it seems for sure the seal next to the valve
> is gone,  but saw no leakage from the core. of course a 5 min test does not
> resemble a 1000 mile drive. makes me think whether the rust on the core is
> just of the coolant running down and pooling up in the plastic case the core
> sits in......
> so do the heater cores typically go bad at all? am I safe just replacing the
> valve?
>
> thanks everyone
> flo
>
>
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