my 97 outback was diagnosed with a head gasket leak (coolant in overflow, moisture in exhaust, milky substance in oil ect...) on the EJ25 DOHC. Car has body damage and 150k miles so decided not to fix, rather drive into the ground (i commute ~1 mile to work each way).
Question is this, what is the likely catastrophic failure mode for leaking head gasket and is there anything i could do to prolong the engine before inevitable catastrophic failure?
thanks, mark