Parts for your 2023 Subaru Outback-Head gasket

2023 Subaru Outback head gasket: what it does, why it matters, and how to look after it

A head gasket absolutely is relevant to the 2023 Subaru Outback. Both engines offered that year—the 2.5‑litre FB25 and the 2.4‑litre turbo FA24—use a multi‑layer steel cylinder head gasket between the aluminium cylinder heads and the block. This is clearly shown in Subaru’s Technical Information System service manuals (engine: Cylinder Block/Cylinder Head sections) and in genuine Subaru parts catalogues, which list the “cylinder head gasket” for each engine variant. So yes, the Outback has a head gasket, and it’s a critical sealing component.

In everyday terms, the head gasket keeps the good stuff where it belongs. It contains combustion pressure, and it keeps coolant and engine oil flowing through their own passages without mixing. On Subaru’s flat (boxer) engines, the gasket’s job is especially important because each bank lies horizontally