Parts for your 1998 Mitsubishi Pajero-Oil pump

1998 Mitsubishi Pajero oil-pump — what it does and how to look after it

Yes, a 1998 Mitsubishi Pajero absolutely uses an engine oil-pump. Mitsubishi’s factory Workshop Manuals for the 6G72/6G74 petrol V6 and 4M40 2.8‑litre turbo‑diesel engines (Lubrication System sections, late‑1990s editions), along with the Mitsubishi ASA electronic parts catalogue and common AU/NZ repair manuals (Haynes and Gregory’s), all describe a crankshaft‑driven, front‑mounted trochoid/gear‑type oil‑pump supplying pressurised oil to the bearings, valvetrain, and on diesel models, the turbocharger.

The oil-pump’s job on a 1998 Pajero is to pick up oil from the sump, pressurise it, and push it through galleries so the crank, cam gear, pistons, and lifters are kept happy. On the 4M40 turbo‑diesel, that pressure feed also keeps the turbo alive. It’s a simple bit of kit, usually integrated into the front cover and driven off the crank, but it’s the heart of the lubrication system—no pressure, no protection.

For everyday servicing, the smartest way to care for the oil-pump is to care for the oil. Sticking to the recommended oil grade for the climate and engine (for example, a quality 15W‑40 diesel oil for 4M40, or 10W‑30/10W‑40 for the V6s) and sensible intervals based on local conditions—often 5,000–10,000 kilometres—reduces sludge and abrasive wear that can score the pump’s rotors and cover plate. Fresh filters matter too