On Fri, 12 Aug 1994, George Ruff wrote:

>      My '84 Vanagon camper has this problem where every 30,000
> miles or so the head gaskets begin to leak, causing gas buildup in
> the water  cooling system.  This first appears as a rising coolant
> level in the overflow tank next to the oil dipstick. Next the
> dashboard heater quits because it fills with gas.  Finally (about
> 2K miles later) the leaking gas literally blows coolant out of most
> of the cooling system and the temperature sensor begins to signal
> imminent meltdown!

In my '85, I had an experience last week of coolant overflowing the 
overflow tank. Level rose. meltdown was signalled by temp. sensor. They 
drained and replaced the coolant and could find no other "cause". It now 
runs fine and temp is back to normal.

Strange.

James Cook