Parts for your 1991 Nissan Primera-Oil pump

1991 Nissan Primera Oil Pump — What It Does and When to Service It

Technical sources confirm the 1991 Nissan Primera (P10) runs a proper engine-driven oil pump, so the part is absolutely relevant on this model. The Nissan Primera P10 Factory Service Manual (FSM) lubrication section, along with the SR20DE/GA16DE engine FSMs, the Haynes Nissan Primera 1990–1999 manual, and Nissan’s parts catalogues, all describe a crankshaft-driven trochoid/gerotor oil pump integrated into the front cover. That means every GA16DE, SR20DE and CD20 variant in the 1991 Primera relies on the oil pump to keep bearings, camshafts and the timing chain bathed in pressurised oil.

Purpose-wise, the oil pump pulls oil through the pickup in the sump, pushes it through the filter, then feeds the galleries to lubricate and cool the internals. Without solid oil pressure, the engine will quickly cop wear—think big-end bearings, cam lobes and timing chain guides.

It’s not a routine replacement item, but it does deserve attention during servicing—especially on higher-kilometre cars. Tell-tales that warrant inspection include a flickering oil warning light at hot idle, rattly top end on warm restarts, persistent timing chain noise, or verified low pressure on a mechanical gauge. If any of these show up, checking clearances and the pressure relief valve in the pump is smart.

When the front cover is off for timing chain work, many owners choose to refresh the pump as preventative maintenance. Best practice under the bonnet includes:

• Use quality oil and a good filter with an anti-drainback valve