Parts for your 2017 Subaru Xv-Head gasket

2017 Subaru XV head gasket — what it does and when to worry

Yes, the 2017 Subaru XV (petrol, FB20 2.0‑litre flat‑four) absolutely uses a head gasket. This is confirmed in Subaru’s Factory Service Manual for the XV/Crosstrek (Cylinder Head section) and the Subaru FAST electronic parts catalogue, both of which list a multi‑layer steel (MLS) cylinder head gasket for the FB‑series engine. Independent service data providers (e.g., Autodata/Haynes for 2012–2017 XV) also document the gasket and the specific torque/angle sequence for the cylinder head bolts. So the head gasket is very much relevant to this model.

On the XV’s boxer engine, the head gasket sits between each aluminium cylinder head and the engine block, sealing three critical pathways: high‑pressure combustion, coolant, and engine oil. Its job is to keep compression where it belongs while stopping coolant and oil from mixing or leaking. Subaru’s MLS design is a big step forward from the old EJ‑series days, offering stronger sealing, better heat cycling durability, and fewer dramas when the cooling system is maintained properly.

There’s no scheduled replacement interval for a head gasket — it’s not a routine service item. Instead, smart ownership comes down to prevention and early detection:

• Stick to the correct long‑life coolant and change it on time, poor coolant kills gaskets and alloy surfaces.
• Never ignore overheating, low coolant warnings, or a sweet smell/steam under the bonnet.
• Watch for signs: rising temp gauge, bubbles in the expansion bottle, white exhaust vapour after warm‑up, milky oil, or unexplained coolant loss.

If replacement is needed, it’s a significant job on a flat‑four and often done with the engine out. A quality repair uses genuine or OE‑equivalent MLS gaskets, follows the factory torque‑angle sequence, checks head flatness and surface finish, and replaces related seals. Many techs will also fit a new thermostat and fresh coolant, and assess water pump and hoses while access is good. Head bolts on FB engines are torque‑to‑yield, reputable shops either replace them or measure and confirm they’re within spec per the Subaru service manual.

Compared with older EJ engines, the FB20 in the 2017 XV is less prone to head‑gasket issues when serviced on time. Keep the cooling system healthy and it should deliver years of tidy, dependable motoring.

Popular questions about 2017 Subaru XV head gaskets

Do 2017 Subaru XVs suffer the same head‑gasket issues as older Subarus?

Not typically. The FB‑series engine in the 2017 XV uses an MLS gasket and improved clamping strategy. With proper coolant maintenance and no overheating events, failures are uncommon compared with the older EJ‑series engines.

What are the early signs of a failing head gasket on an XV?

Look for unexplained coolant loss, bubbles in the overflow, overheating under load, a pressurised upper hose when cold, persistent white vapour after warm‑up, or oil contamination. Catching these early can save the heads and keep machining to a minimum.

What’s involved in replacement and how long does it take?

A proper repair involves engine removal on most workshops’ procedures, head inspection and machining if required, new MLS gaskets, torque‑angle tightening per the FSM, and fresh coolant. Many shops add a thermostat and relevant seals. Allow a couple of days’ workshop time depending on parts and machining turnaround.