Could you possibly have a crimped hose or tube somewhere that's causing
undo pressure in the system?  Maybe you should trace all the hoses and
make sure.  Sounds like a real drag!

                                                            Mike G.

Paul Cavanaugh wrote:

> My 1990 (180k miles) GL automatic just had it's 4th rear heater core
> burst in 12 months!
>
> It also has burst two (metal) differential coolers, flooding coolant
> into and ruining my transmission.
>
> Any ideas what could be happening?
>
> My friends are urging my to give up the car (and I am tired of
> pulling up the flooded carpet)!
>
> Thanks!
> Paul