On Wed, 26 Nov 1997 Erlaz@AOL.COM wrote:

> I have developed another coolant leak but this time it appears to be coming
> from one spot under the expansion tank cap. I thought that the seal under the
> cap was the problem so I replaced the cap. The leak still appears. Could I
> have a hairline crack in the expansion tank . Has anyone had this problem.
> Let me know please. The vanagon is a 91 GL with 91,000 miles on it.

It's likely a crack in the expansion tank. Leaking coolant appears to be a
common problem for the water-cooled. I always thought it was the O-ring
that sits under the sensor. Replaced that, but it still leaked. Before I
invested in a new sensor or caps or seals for same, I had the unit checked
under pressure. Sure enough, it's a hairline crack in the tank.

For all those in warmer climates, who have a persistent leaking problem
(from around the coolant reservoir), check your reservoir.

Chris
vanagon list admin