Parts for your 1998 Mitsubishi Pajero-Water pump

1998 Mitsubishi Pajero Water Pump — Fitment, Purpose, and Service Tips

Technical references, including the Mitsubishi Pajero/Montero factory workshop manuals (1991–1999), the Mitsubishi ASA parts catalogue, Gates timing component listings, and Haynes Pajero manuals, confirm that every 1998 Mitsubishi Pajero engine variant is fitted with a mechanical water pump. That covers the 3.0L V6 6G72, the 3.5L V6 6G74, and the 2.8L diesel 4M40. On the V6 petrols the pump is driven by the timing belt, while on the 4M40 diesel it’s driven by the accessory belts with the viscous fan attached. So yes, a water pump is absolutely relevant and used on a 1998 Pajero.

On a 1998 Pajero, the water pump’s whole job is to keep coolant flowing through the block, heads, heater core and radiator so the engine sits right in its sweet spot for temperature. That keeps power steady, reduces pinging and hot spots, protects the alloy heads, and makes sure the demister and heater work properly. If the pump gets sloppy or starts leaking, overheating and head gasket grief aren’t far behind.

For the V6s (6G72/6G74), it’s smart practice to replace the water pump at the same time as the timing belt service — typically around 90,000–100,000 kilometres or five years, whichever comes first. Labour overlaps heavily, so doing both at once saves time and hassle. For the 4M40 diesel, the pump is external and driven by accessory belts