I just had two SVX do the same thing!
The rubber hose on the left side of the engine,
under the intake manifold,
had a VERY small cut (1/8")
If you go to
www.subaruparts.com,
Log on,
check out 1992 SVX 4WD,
engine,
Water Pump,
check out part #12
The part # for it is;
807611111