Parts for your 2022 Subaru Xv-Manifold gasket

2022 Subaru XV manifold gasket — what it does and when to sort it

For the 2022 Subaru XV (G5X, FB20 engine), a manifold gasket is absolutely used and relevant. Subaru’s Technical Information System (STIS) service manual for MY2022 specifies gaskets at both the intake and exhaust manifolds, and instructs replacing them whenever the manifolds are removed. The official Subaru electronic parts catalogue (EPC) for the 2022 XV likewise lists intake manifold gaskets and exhaust manifold gaskets for the FB-series engine. These factory sources confirm the XV isn’t a sealant-only setup — it relies on purpose-made manifold gaskets to keep things sealed under heat, vibration and pressure.

The manifold gasket’s job is pretty straightforward: it seals the join between the manifold and the cylinder head so the engine can breathe correctly and so gases don’t escape. On the intake side, a healthy gasket stops unmetered air sneaking in, which would otherwise cause a rough idle, lean running and dodgy fuel economy. On the exhaust side, the gasket prevents hot exhaust leaks that can sound like a ticking on cold start, reduce low-end torque, and potentially allow fumes into places they shouldn’t be.

As part of routine servicing on a 2022 Subaru XV, manifold gaskets aren’t a scheduled replacement item by time or kilometres, but they are a “replace when disturbed” component. Any time the intake or exhaust manifold comes off — say for carbon clean-ups, injector work, O2 sensor or catalytic converter jobs, or clutch/gearbox work where access is needed — fit new gaskets. They’re inexpensive insurance against vacuum leaks or exhaust leaks that can trigger fault codes, fuel trims out of whack, or that tell-tale soot line around a flange. Keep an ear out for ticking noises at the front of the engine on cold start, note any sulphur-like smells, and watch for a hissing idle — all are clues a gasket may be on the way out.

When replacing, go with genuine or quality aftermarket gaskets suited to the FB20. Clean mating faces, avoid scraping that scars the alloy, and never reuse compressed metal or graphite gaskets. Follow the Subaru torque specs and sequence from STIS — typically a gradual, criss-cross pattern — and recheck fastener torque after a couple of heat cycles if accessible. After intake work, clear fuel trims and verify there are no leaks with a smoke test. After exhaust work, check for sooting and listen for leaks once it’s heat-soaked.

• Use new gaskets whenever manifolds are removed.
• Watch for rough idle, ticking on cold start, or exhaust smell.
• Follow Subaru torque procedures and perform a leak check.

Popular questions

What are the signs of a leaking manifold gasket on a 2022 Subaru XV?
A leaking intake gasket often shows up as a rough or high idle, a hissing sound, and long-term fuel trims going positive. A leaking exhaust gasket can make a ticking noise at cold start that softens when warm, leave a faint soot line at the flange, and in some cases cause sluggish response down low. If in doubt, a smoke test (intake) or an inspection when cold (exhaust) helps confirm it.

How often should the manifold gaskets be replaced?
They’re not a periodic item. Replace them whenever the intake or exhaust manifold is removed, or if symptoms of leakage appear. On a well-maintained XV, they can last many years and well over 150,000 km, provided they’re not reused after removal and the correct torque sequence is followed.

Is it OK to drive with a small exhaust manifold leak?
It might be drivable, but it’s not ideal. Even a small leak can skew O2 sensor readings, sap low-end torque, and risk fumes entering the cabin. Heat erosion can also make the leak worse. Best bet: plan a repair and fit fresh gaskets sooner rather than later.