The rear heater core is, of course, the plastic core that sits
inside the fan housing under the rear seat, blowing heat to the rear
passengers.
The "differential cooler" is a metal part on
the automatic transmission that passes coolant through on one
side and hot transmission fluid through the other side. I presume
this is to cool down the AT fluid. It is possible this has another
name - I will try to find out more.
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