Parts for your 2016 Subaru Outback-Manifold gasket

2016 Subaru Outback manifold-gasket — what it is and when to sort it

Manifold gaskets are absolutely used on the 2016 Subaru Outback. Subaru’s factory Service Manual for the 2015–2019 Outback/Legacy (FB25 2.5L and EZ36 3.6L engine sections) and the Subaru genuine parts catalog for the BS-series both list intake manifold gaskets (manifold-to-head) and exhaust manifold gaskets (manifold-to-head) for this model year. So “manifold-gasket” is relevant kit on this vehicle.

On a 2016 Outback, these gaskets seal two critical junctions: the intake manifold gaskets keep unmetered air from sneaking into the engine, while the exhaust manifold gaskets keep hot exhaust gases from escaping before the catalytic converters. When they’re doing their job, the car runs smoothly, fuel trims stay tidy, emissions gear is happy, and there’s no whistling, ticking, or exhaust pong under the bonnet.

They’re not a routine “every X kilometres” item. Instead, think of them as “replace on disturbance” or when symptoms point to a leak. Any time the intake or exhaust manifold is removed—say for spark plugs on the EZ36, a PCV job, or exhaust work—fresh gaskets should go in. Subaru’s Service Manual also calls for correct torque and tightening sequence, so whoever’s on the spanners should follow the factory procedure to avoid warping or poor sealing. Use OEM-quality gaskets, clean the mating faces gently, and check studs/bolts and heat shields while you’re there.

• Likely signs an intake manifold gasket is crook: rough idle, lean codes (like P0171), a hiss under the bonnet, higher fuel use, or hesitation on tip-in.
• Likely signs an exhaust manifold gasket is leaking: a sharp ticking on cold start, soot marks at the flange, exhaust smell in the cabin, or oxygen sensor fuel trims chasing their tail.

Left alone, intake leaks can cause lean running and detonation risk, while exhaust leaks can skew O2 readings and push fumes where they shouldn’t be. For owners in NZ (WOF) or Australia (roadworthy), an obvious exhaust leak can also be a compliance headache. As part of servicing, it’s smart to inspect around both manifolds for stains, odours, or noise, especially on higher-kilometre cars that have seen plenty of heat cycles.

Popular questions

Does a 2016 Subaru Outback have intake and exhaust manifold gaskets?
Yes. Both FB25 and EZ36 engines in the 2016 Outback use gaskets at the intake manifold-to-head and exhaust manifold-to-head joints. This is confirmed in the Subaru Service Manual and the BS-series Subaru parts catalog.

How often should manifold gaskets be replaced on a 2016 Outback?
There’s no fixed interval. Replace them whenever a manifold is removed or if there are leak symptoms. During major services, a quick check for noise, smells, or soot marks is worthwhile, and always follow the factory torque sequence when refitting.

Is it okay to drive with a leaking manifold gasket?
It’ll usually still run, but it’s not a great idea. An intake leak can make the engine run lean