Parts for your 2000 Mitsubishi Pajero-Oil pump

2000 Mitsubishi Pajero Oil Pump: what it does and when to service it

Technical sources confirm the 2000 Mitsubishi Pajero does use an engine oil pump. The Mitsubishi Motors Pajero NM (2000) Service Manual (Group 11A – Engine Lubrication) details a crankshaft-driven internal gear/trochoid oil pump for the 3.5L 6G74 V6 petrol, and the 3.2L 4M41 Di‑D diesel shows a similar front-case pump in its lubrication section. Mitsubishi’s ASA parts catalogue also lists an “oil pump assembly” for these engines, and independent manuals for the era include oil pump inspection and replacement procedures. So, an oil pump is very much relevant to this model.

On the 2000 Pajero, the oil pump’s job is to pull oil from the sump, pressurise it, and feed it through galleries to crankshaft and cam bearings, lifters, and the top end. On the 6G74 petrol it’s integrated into the front cover and driven directly by the crank, on the 4M41 diesel it sits in the timing/front case as well. Without steady pressure, bearings run dry, clearances open up, and the engine quickly gets unhappy.

Replacing the pump isn’t routine, but it’s sensible to assess it during big jobs under the bonnet. On high-kilometre engines, or if the oil light flickers when hot, there’s top-end rattle on start-up, or a gauge shows low pressure, it’s time to test with a mechanical gauge at the sender port. If pressure is genuinely low, check the basics first: correct oil grade, a quality filter, a clean pickup strainer, and that the relief valve isn’t sticking. Leaks at the front crank seal or pump housing also warrant attention.

If a new pump is needed, it’s a front-of-engine job. Expect to remove belts and covers (timing belt on 6G74, front case on 4M41), the crank pulley/harmonic balancer, and often to drop or loosen the sump to unseal the pump/front case. Follow workshop-manual sealant patterns, replace O‑rings and seals, and pre‑lube the pump gears. After reassembly, crank with fuel/ignition disabled to build pressure before first fire-up.

Good ongoing practice includes:

• Use the correct oil specification and change it every 10,000 km (or sooner if towing/off‑road).
• Always fit a quality filter with an anti-drainback valve.
• Inspect for leaks and listen for new cold-start rattles after services.
• During a timing-belt service on the 6G74, consider front-seal and pump inspection while access is easy.

Treat the oil pump as the heart of the 2000 Pajero’s engine. Keep the oil clean and the pickup clear, and it’ll keep the pressure up for the long haul.

Popular questions about 2000 Mitsubishi Pajero oil pumps

Does a 2000 Pajero have an oil pump, and where is it?
Yes. Both the 3.5L 6G74 petrol and 3.2L 4M41 diesel use a crankshaft‑driven oil pump inside the front cover/timing case. It’s not an external, standalone unit, access typically involves removing the crank pulley and front covers.

What are the signs the oil pump might be failing?
Common warnings include an oil pressure light flickering at hot idle, noticeable top‑end ticking on start-up, or confirmed low pressure on a mechanical gauge. Metallic glitter in the oil or a clogged pickup screen can also point to a lubrication problem. Don’t keep driving if the oil light comes on—switch off and investigate.

Is oil pump replacement routine maintenance?
No. The pump usually lasts the life of the engine if oil changes are kept up. It’s assessed during major front-of-engine work or when there’s evidence of low pressure, leaks, or wear. Many owners take the chance to refresh seals and the pickup O‑ring during sump or timing work.