Parts for your 2014 Subaru Impreza-Manifold gasket

2014 Subaru Impreza manifold-gasket: what it does and when to sort it

Based on the Subaru Factory Service Manual for the FB20 engine (MY2014 Impreza, Intake and Exhaust sections) and the Subaru Genuine Parts catalogue for this model year, the 2014 Subaru Impreza is fitted with manifold gaskets — both intake-manifold and exhaust-manifold types. The service manual specifies gasket replacement when manifolds are removed and details torque sequences for reassembly, confirming the manifold-gasket is relevant to this vehicle.

On the 2014 Impreza, the manifold-gasket seals the joins where the intake manifold meets the cylinder heads and where the exhaust manifold (header) bolts to the heads. Intake gaskets keep unmetered air out so the engine doesn’t run lean, while exhaust gaskets keep hot gases in the exhaust stream to protect nearby components and keep noise and emissions in check. When these seals harden, shrink, or get crushed from heat cycles, they can cause rough idle, a check engine light, ticking from the exhaust side, or a whiff of exhaust under the bonnet.

Manifold-gaskets aren’t a routine replacement item on a service schedule