The oil cooler coming loose would leak oil. The only way for the oil cooler
to lose coolant would be for it to have a hole, or a leaky hose. Look
carefully. More likely you have a leaking water pump, a hose, or one of the
small pipes going to/from the cooler.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Andrew Philbrick
Sent: Sunday, December 07, 2008 4:36 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Oil Cooler leaking coolant

Hey Volks

2.1 stock wasserboxer in an '86 Westy

I installed a new oil cooler about 7 months and 2,000 miles ago.  Just
recently (within the last few days) my Vanagon has been leaking coolant
at about the rate of one drop every 3-4 seconds.  The leak appears to be
coming from the seal between the oil cooler and the engine case and only
when warm.  Could this be due to the oil cooler nut having come
loose/the seal failing?  My other though is that the diaphragm has
failed.  Should I be looking at getting a new oil cooler or just the seal?

Thanks,
Andrew

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