Subaru Outback head gasket failure after 94,000 miles on Subaru Outback

Some Subaru Outback owners report experiencing head gasket failure after 94,000 miles, which is a known concern in certain Subaru models. These issues are particularly prevalent in vehicles equipped with the EJ251, EJ252, and EJ253 engines, which are more susceptible due to their composite-style head gaskets. Symptoms of head gasket failure reported by owners include oil leaks from the left head, progressing to leaks on the right head and eventually dripping onto the ground. To mitigate these problems, some owners recommend replacing the head gaskets with multi-layer steel (MLS) versions, machining the heads, and ensuring that repairs are performed correctly for durability. The head gasket is crucial for sealing the connection between the cylinder head and the block, maintaining the integrity of the cooling system, oil passages, and combustion chambers under varying conditions.