Are these expansion tanks from Ford? Could they be cheap quality?
Overpressure in a cooling system can defiantly be caused by a head gasket.
However, a restricted radiator, sticking thermostat, inoperative electric cooling fan, missing/rusting impellers on water pump can all cause overheating which directly translates to overpressure.
Overpressure in a cooling system can defiantly be caused by a head gasket.
However, a restricted radiator, sticking thermostat, inoperative electric cooling fan, missing/rusting impellers on water pump can all cause overheating which directly translates to overpressure.