Coolant loss and overheating are often labelled as Subaru head-gasket failure too early. This guide explains what should be checked first.
Possible warning signs
Repeated coolant loss, unexplained overheating, combustion pressure in the cooling system, contamination or persistent hose pressure can justify further testing.
Other cooling faults
Radiators, caps, reservoirs, hoses, thermostats, fans and water pumps can all create cooling symptoms without a failed head gasket.
Why confirmation matters
Head-gasket repair is major work. Pressure testing, leak inspection and targeted combustion-gas or mechanical tests help establish whether that level of repair is justified.
Need your Subaru assessed?
If a symptom is already present, a workshop inspection is more useful than trying to diagnose the vehicle from a generic guide. Vehicle condition, engine/transmission type and fault data can change the answer.