All cars are susceptible to blowing a head gasket but Subaru’s are more prone to failing. Reason being is how the motor was designed cylinder 4 got the short end of of the stick when it comes to cooling leading to over heating and warping the heads allowing a gap and letting coolant leak and causing a head gaskets failure. Coolant can either leak into the combustion cylinder leading to constant white smoke out of the exhaust or leaking outside the motor.
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