hey guys  all the subies  with the OHC engines had head gasket  problems,
even the 2.2 L but it is probably the better of the bunch.  We  have done
hundreds of them , happens about 150K and you really need to rework  the heads
while you have them off as the valves and seats wear real bad., not  just
replace the head gaskets. They also had problems with the radiators which
causes a lot of the head gasket problems. later  mark D  salem import  service