Parts for your 2014 Subaru Forester-Exhaust gasket

2014 Subaru Forester exhaust gasket — what it does and when to replace it

Per the Subaru Forester (SJ, 2014) Service Manual — Exhaust System section — and the Subaru Electronic Parts Catalogue (Group 44: Exhaust), the 2014 Forester absolutely uses exhaust gaskets. Both the 2.5i (FB25) and the 2.0XT turbo (FA20F) have multiple sealing points: cylinder head–to–exhaust manifold gaskets, a front “donut” ring gasket at the spring-bolt joint, flange gaskets further down the system, and (on XT) turbo outlet and up-pipe gaskets. So an exhaust-gasket is relevant and fitted on this model.

These gaskets seal the joins between exhaust components so hot gases don’t escape. That keeps noise down, prevents fumes from sneaking into the cabin, helps the oxygen sensors read accurately, and maintains the correct flow for the catalytic converter and, on XT models, for turbo response. When a gasket fails, drivers might hear a ticking or chuffing on cold start, smell exhaust near the front of the car, or see sooty marks at a flange.

Exhaust gaskets aren’t generally a scheduled replacement item, they’re replaced when a joint is disturbed (any time a section is removed) or when a leak develops. For the 2014 Forester, the smart play during servicing is to inspect the manifold-to-head area, the spring-bolt donut joint, and rear flanges for soot, noise, or leaks. If anything’s apart — say, for an O2 sensor, catalytic converter, turbo, or muffler job — fit new genuine-spec gaskets rather than reusing old ones.

Good workshop practice on these Subarus includes: letting the system cool fully, soaking old hardware with penetrant, using new spring bolts and nuts at the donut joint, lightly anti-seizing studs and nuts (away from O2 sensor threads), and torquing to the specs in the Subaru Service Manual. On 2.0XT models, expect extra heat shielding and additional gaskets at the turbo and up-pipe — take care with alignment so there are no boost or pre-cat leaks.

• Tell-tale signs: ticking on start-up that quietens warm, rotten-egg or exhaust smell, visible soot at a joint, raspy note under load, or a check engine light from fuel trims or cat efficiency.
• If corrosion has had a go at the studs or spring bolts, a professional swap is usually quicker and safer.

Popular questions

Do all 2014 Forester models use exhaust gaskets?
Yes. Both the 2.5i and 2.0XT use multiple exhaust gaskets, including manifold gaskets, a front-pipe donut gasket with spring bolts, and rear flange gaskets. The XT also has gaskets at the turbo and up-pipe. These are all shown in the Subaru Service Manual and the Subaru parts catalogue for the SJ series.

How often should exhaust gaskets be replaced on a 2014 Forester?
There’s no fixed kilometre interval. Replace them whenever a joint is separated or if there’s a leak. If there’s a ticking noise, soot marks at a flange, or a smell of exhaust, it’s time to inspect and likely fit new gaskets and hardware.

Is it safe to drive with a leaking exhaust gasket?
Best avoided. Fumes can enter the cabin, oxygen sensor readings can go wonky, and on the XT a leak can affect turbo response. If you must drive, keep trips short and head straight to a workshop.