Parts for your 2014 Subaru Forester-Head gasket

2014 Subaru Forester head gasket — purpose, care, and when to replace

Based on technical sources, the 2014 Subaru Forester (SJ) does use a head gasket. The Subaru factory workshop manual for the SJ series (Engine sections for FB25 2.5i and FA20F 2.0 XT) details cylinder head removal and installation with a specified cylinder head gasket and torque/angle procedures. Subaru’s electronic parts catalogue (FAST/EPC) also lists a “Gasket – Cylinder Head” for both engines. So the head gasket is absolutely relevant to this model.

On this Forester, the head gasket sits between the aluminium cylinder head and the engine block on each bank of the flat-four. Its job is to keep combustion pressure sealed while also separating engine oil and coolant as they pass between the block and head. Subaru’s later FB and FA engines use robust multi‑layer steel (MLS) gaskets, a big step forward from older EJ-series designs.

Owners value the head gasket because it underpins reliability. If it starts to fail, they’ll see overheating under load, unexplained coolant loss, a sweet smell from the exhaust, bubbles in the header tank, or milky residue on the oil filler cap. Left alone, a minor seep can turn into a cooked engine, so catching it early saves serious coin.

As part of regular servicing, it helps to:

• Keep the cooling system spot on: use the correct Subaru long‑life coolant, maintain the 50/50 mix, and replace it on schedule. A healthy radiator cap and clean condenser/radiator fins also keep temps down.
• Fix any leaks quickly: stray air in the system from a weeping hose or water pump makes life hard for the gasket.
• Watch temps under the bonnet: towing, long hill climbs, or hot summer traffic are when a weak gasket first shows itself.

If replacement is needed, it’s a workshop‑level, engine‑out job on the Forester’s boxer layout. Proper diagnosis (chemical block test, pressure test, cylinder leak‑down) should come first. The repair should include OEM‑quality MLS gaskets, new seals, fresh coolant, and careful attention to the head bolt torque‑angle sequence exactly as per the Subaru manual. The cylinder heads should be checked for flatness and surface finish, machine only if measurements say so. With timing chains rather than a belt, there’s no scheduled chain swap, but it’s smart to inspect guides and tensioners while access is easy. Expect a solid day of labour, doing it right once is cheaper than doing it twice.

Popular questions about 2014 Subaru Forester head gaskets

Do all 2014 Foresters have head gaskets?
Yes. Both the 2.5‑litre FB25 and 2.0‑litre turbo FA20F engines use head gaskets, specified in the Subaru SJ workshop manual and listed in the Subaru parts catalogue.

How long should the head gasket last?
With proper cooling system care and normal driving, many FB/FA engines run well past 200,000 km without gasket trouble. Heat stress, neglected coolant, or persistent overheating will shorten that lifespan.

What’s involved in replacement and what else should be done?
It’s typically engine‑out, with diagnosis first, then new MLS gaskets, seals, fluids, and head bolt torque‑angle per the manual. Heads are measured and only machined if out of spec. While in there, inspect chain guides, tensioners, water pump, and thermostat for peace of mind.