Could you be cpecific about what is actualy bursting?
I think i mentioned before there is more reliable aftermarket trans
cooler(called Supercooler) that can solve this problem.
Leon
85 Subwagen Westy

Paul Cavanaugh wrote:

> Well, the mystery continues...
>
> My mechanic tested the coolant (while the engine was both hot and
> cold) for traces of combustion leakage (hydrocarbons in the cooling
> system) and found nothing.
>
> He also found no excessive pressure in the oooling system (I replaced
> the expansion tank pressure cap 2 weeks ago, just to be safe).
>
> No explanation for 4 rear heater cores and 2 differential coolers
> bursting in one year!
>
> He is suggesting it could this be an intermittent problem??? I don't
> want to lose another transmission!
>
> Any ideas from my Vanagon.com friends would be welcome.
>
> Thanks,
> Paul