Parts for your 2014 Subaru Outback-Manifold gasket

2014 Subaru Outback manifold gasket: what it does and when to replace it

The 2014 Subaru Outback definitely uses manifold gaskets—both intake and exhaust. The Subaru Factory Service Manual (engine: intake and exhaust system procedures for FB25 2.5i and EZ36 3.6R) calls for new gaskets whenever the manifolds are removed, and the Subaru Genuine Parts Catalogue lists dedicated intake manifold and exhaust manifold gaskets for this model year. Major aftermarket catalogues (e.g., Fel‑Pro, Mahle) also list direct-fit manifold gaskets for the 2014 Outback, which further confirms fitment.

On this Outback, the manifold gaskets seal the join between the cylinder heads and the intake or exhaust manifolds. Intake manifold gaskets stop unmetered air sneaking in, which protects idle quality and fuel trims. Exhaust manifold gaskets keep hot exhaust gases inside the system, preventing ticking noises, fumes under the bonnet, and oxygen-sensor confusion. They’re small and cheap, but they’re crucial for smooth running, emissions compliance, and fuel economy.

• Rough idle, hesitation, or a whistle/hiss (intake leak)
• Exhaust tick on cold start that quietens as it warms up (exhaust leak)
• Fuel economy drop or sulphur/fume smell under the bonnet
• Sooty tracks around the exhaust manifold flange
• Check Engine Light with lean codes (e.g., P0171) or misfires
• Higher than usual short/long‑term fuel trims on a scan tool

Servicing wise, gaskets should be replaced any time an intake or exhaust manifold is removed—no reusing the old ones. Follow the factory torque values and sequence from the Subaru service manual, clean both mating faces until spotless, and install the new gasket dry unless the manual specifically calls for a sealant (most Subaru intake and exhaust gaskets are multi‑layer steel or graphite/composite and go on without goo). Check studs and nuts