Parts for your 2014 Subaru Impreza-Oil pump

2014 Subaru Impreza oil pump — purpose, servicing and replacement

Based on the Subaru Factory Service Manual for the FB20 engine (Lubrication section) and Subaru’s official service/parts catalogues, the 2014 Subaru Impreza is fitted with a crankshaft‑driven trochoid (gerotor) engine oil pump mounted at the front of the engine. So yes, the oil pump is absolutely relevant on this model.

The oil pump’s gig is simple but vital: draw oil from the sump through the pickup, pressurise it, and send it through galleries to the crank and rod bearings, camshafts, timing chains, and the AVCS system. Consistent oil pressure means less wear, quieter running, and better temperature control—especially handy for long Aussie and Kiwi drives and hot summer starts under the bonnet.

There’s no scheduled replacement for the pump in the logbook, it’s looked after indirectly by running the correct oil and filter and sticking to the service intervals set for local conditions (typically every 10–12.5 thousand kilometres or 6–12 months, depending on market guidance). Subaru specifies a low‑viscosity full‑synthetic, commonly 0W‑20 for the FB20, some climates allow 5W‑30—follow the owner’s handbook.

When the front cover is off for timing‑chain or seal work, good practice is to check rotor‑to‑body clearances, the pressure relief valve’s movement, and the pickup O‑ring and screen. Any scoring, excessive end play, or a sticky relief valve is reason enough to replace the assembly. On reassembly, the pump should be primed with clean oil, and Subaru‑approved sealant used on the front cover so it can’t suck air and lose prime.

• Typical warning signs: a low oil‑pressure light, rattly chain or valvetrain on start‑up, bearing knock, or metallic sparkle in drained oil.
• Quick care tips: use a quality filter with an anti‑drainback valve, fix front cover or crank seal leaks promptly, and confirm pressure with a mechanical gauge if the dash light flickers.
• Replacement notes: the pump sits behind the crank pulley, access usually means removing belts, the pulley and the front cover. Clean sealing surfaces and correct torque matter, so it’s a pro job unless you’re properly tooled‑up and experienced.

Technical basis: Subaru Factory Service Manual (FB20) Lubrication (LU) section and Subaru service/parts catalogues specify the engine oil pump assembly and its role on the 2014 Impreza.

Popular questions about the 2014 Subaru Impreza oil pump

Does the 2014 Subaru Impreza have an oil pump?
Yes. The FB20 engine in the 2014 Impreza uses a crankshaft‑driven trochoid oil pump at the front of the engine. This is documented in the Subaru Factory Service Manual (Lubrication section) and the official Subaru parts catalogues.

When should the oil pump be replaced on a 2014 Impreza?
There’s no routine replacement interval. It’s replaced if low oil pressure is confirmed (after ruling out oil level, viscosity, filter issues and bearing wear), if the relief valve is faulty, if internal scoring is found during front‑cover work, or if there are leaks that can’t be resolved with seals and proper sealing.

What oil helps protect the pump and engine?
Use the handbook‑specified full‑synthetic (commonly 0W‑20 for the FB20, some regions allow 5W‑30) and change it on time. A quality filter with an anti‑drainback valve helps maintain prime and pressure, especially on cold starts.