Parts for your 2022 Subaru Xv-Head gasket

2022 Subaru XV head gasket — what it does and when to replace it

Based on Subaru technical references — including the FB20/FB20D Engine Service Manual, the GT-series Subaru XV (2021–2022) Workshop Manual, and the Subaru Genuine Parts Catalogue — the 2022 Subaru XV uses a head gasket. The FB-series 2.0‑litre horizontally opposed petrol engine has aluminium cylinder heads on an aluminium block with a multi‑layer steel (MLS) head gasket between them. Because it’s a boxer, there are two heads and therefore two head gaskets, one per bank.

In this XV, the head gasket’s job is to seal the combustion chambers while keeping the engine’s oil and coolant passages separated and leak‑free. It maintains compression, protects against cross‑contamination, and helps the engine run smoothly and efficiently. MLS construction gives reliable clamping and heat‑cycle durability when the proper torque‑to‑yield head bolts and tightening sequence (as specified in Subaru service literature) are used.

A head gasket isn’t a scheduled maintenance item, it’s replaced when there’s evidence of failure or when the engine is apart for other major work. Keeping the cooling system healthy is the best preventative care. The FB engine family is far less prone to head‑gasket dramas than older EJ units, but neglect or overheating can still cause trouble.

• Good habits: use the correct Subaru long‑life coolant, keep levels steady, fix any leaks promptly, and ensure the radiator cap seals properly. After any overheat event, have the cooling system pressure‑tested and the coolant checked for combustion gases.
• Early warning signs to watch for: unexplained coolant loss, intermittent overheating, white steam from the exhaust once warm, a sweet smell from under the bonnet, bubbles in the expansion tank, rough cold starts, or milky residue under the oil filler cap. Any of these warrant proper diagnosis.
• Replacement advice: if a gasket has failed, quality workshops typically remove the engine for access, replace both bank gaskets, inspect head flatness against Subaru specs, use new single‑use head bolts, and fit fresh intake/exhaust gaskets, thermostat, and fluids. Correct torque‑and‑angle procedures and the Subaru sealant methods for cam carriers are essential. A careful bleed of the cooling system and a thorough road test round out the job.

Owners who stick to the factory cooling‑system maintenance guidance in the owner’s manual and address small leaks early usually enjoy long, drama‑free service from the 2022 XV’s head gaskets.

Do all 2022 Subaru XVs have two head gaskets?

Yes. The 2.0‑litre FB‑series engine is a flat‑four, so it has two cylinder heads — left and right — each sealed to the block with its own multi‑layer steel head gasket. Hybrid e‑BOXER variants use the same engine architecture, so the two‑gasket setup applies there as well.

What are the first signs a 2022 XV head gasket might be failing?

Common clues include gradual coolant loss with no obvious leak, occasional overheating, bubbles in the expansion tank, white steam from the exhaust after warm‑up, or a sweet smell under the bonnet. Sometimes there’s a rough cold start or mayonnaise‑like residue under the oil cap. A cooling‑system pressure test and a chemical block test are the usual next steps at a workshop.

Is head gasket replacement a routine service item on a 2022 XV?

No. It’s not part of scheduled servicing. Replacement is only recommended when testing confirms a failure or if the engine is being rebuilt. Regular coolant changes using the correct Subaru coolant and prompt attention to any overheating will help the gaskets last the distance.