Hi Leon,

I have lost two trans coolers, so I will look into the "supercooler",
maybe check Rocky Mountain motorworks.

My mechanic tested the OLD cap and found it failed on the weak side -
wasn't holding any pressure.

He has no idea what has caused the 4 heater cores and 2 transmission
coolers to go.

Mechanic's assistant says BMW & VW are the only ones he know of that
mount the coolers on the transmission; everyone else runs hoses up to
a cooler by the radiator. Also says VW is the only ones he's ever
seen go bad.

Any other ideas? I have an appointment next weak at another repair shop...

Thanks,
Paul

>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