Why do head gaskets fail on Subarus?

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.

What year Subaru have head gasket problems?

What is this? The main problem years are 1996 through 2004. The most common engine to have head gasket failures is the naturally aspirated (non turbo) Subaru 2.5 L four cylinder engine, commonly known as the EJ25 motor.

Why do Subaru Motors fail?

One of the most common engine issues Subaru owners have dealt with has to do with faulty head gaskets. These head gaskets suffered from external leaks between the cylinder heads and the engine block causing coolant and/or oil to leak out between the head and the block.

How do I stop my Subaru head gasket from failing?

What Can I Do To Prevent Subaru Head Gasket Problems?

1. Regularly changing the engine oil.
2. Regularly changing the coolant.
3. Checking the oil and coolant levels often.
4. Use OEM parts, oils, and coolant.

What are common problems with Subarus?

The Most Common Subaru Problems

• Denso Fuel Pump Failure.
• CAN System Parasitic Drain on the Battery.
• Unintended Acceleration.
• Brake Light Switch Defect.
• Cracked Windshields.
• Subaru STARLINK Problems.
• Lineartronic CVT Reliability.
• Rodents Chew Subaru’s Soy Wires.

Where does Subaru rank in reliability?

According to our trusted folks at RepairPal, the Subaru brand has an overall reliability rating of 3.5 out of 5 and ranks 14th out of 32 car brands. Right off the bat, Subaru is more reliable than most car brands out there.

Why is Subaru bad?

Subarus are often derided as the least reliable Japanese cars, and for good reason. They have had, over the years, systemic, unresoved problems with their 4 cylinder boxer engine, namely head gasket failures and high oil consumption.

What is the best additive for a blown head gasket?

The Steel Seal Blown Head Gasket Fix Repair Sealer is our top pick for the best overall permanent head gasket sealer. It works well on older and new vehicles and is suitable for cars, vans, SUVs, and trucks. If your budget is a little tight and you still need a professional-grade sealer, check out the K-Seal ST5516 HD.

What is the number one head gasket sealer?

Comparison table