The original head gaskets on a Subaru 2.5 engine tend to fail between 100,000 and 150,000 miles. Most replacement gaskets last just as long. Will the repair cause other problems for my Subaru? Head gasket replacement usually goes smoothly and doesn't cause any other issues.

What year did Subaru stop having head gasket problems?

By 2011, the Subaru Impreza was the only model that experienced head gasket problems. The Subaru Outback was re-designed in 2012, and the new motor has fixed all of the leaking issues.

Why do Subaru head gaskets fail?

Subaru uses the Boxer engine which has a horizontal design and pistons lay flat in the cylinder. When the engine is turned off, the fluids tend to pool next to the head gaskets instead of draining, and over time acids in the fluids eat away at the seals. The gaskets deteriorate and oil and coolant fluids start leaking.