Parts for your 1998 Mitsubishi Pajero-Coolant

1998 Mitsubishi Pajero Coolant

Coolant is absolutely relevant and used on the 1998 Mitsubishi Pajero. Technical sources including the Mitsubishi Pajero/Montero Factory Service Manual (Group 14: Engine Cooling, late-1990s editions) and popular workshop references like the Haynes Mitsubishi Pajero/Montero Repair Manual specify a pressurised, liquid-cooled system on the 4M40 2.8 TD and 6G7-series V6 engines, using ethylene glycol–based coolant with corrosion inhibitors. These documents outline the radiator, thermostat, water pump and heater core, and prescribe the correct coolant type and service intervals—confirming coolant is a fitted and essential service item on this model.

For the 1998 Pajero, coolant does three big jobs: it stops the engine boiling on hot days, prevents freezing in cold snaps, and protects alloy components from internal corrosion. It also carries heat to the cabin heater and keeps temperatures steady so the engine runs sweet as. A quality ethylene glycol–based coolant meeting Mitsubishi’s spec is the go-to, mixed with demineralised or deionised water—commonly at 50/50 for year-round protection. Owners should avoid mixing different coolant chemistries and colours, stick with one type and flush if changing brands or formulations.

For servicing, most 1990s Pajeros benefit from a coolant change roughly every 2 years or 40,000–50,000 km, unless a genuine long-life formulation is used and specified otherwise in the handbook. During routine checks, look for the correct level in the overflow bottle when the engine is cold, inspect the radiator cap seal, and scan hoses, the water pump area and the radiator tanks for any damp patches or white/green crusting. A sweet odour, rusty or milky coolant colour, sluggish heater performance or creeping temps are all hints it’s time for attention.

When replacing coolant, drain, flush thoroughly until the water runs clear, then refill with the correct mix. Bleed air out per the workshop manual to avoid hot spots and erratic gauge readings. It’s smart to renew the radiator cap if it’s old, and to check the thermostat and fan clutch (or electric fans) while there. Dispose of old coolant responsibly—it’s toxic to pets and the environment.

• Use ethylene glycol–based coolant that meets Mitsubishi’s spec.
• Mix with demineralised water (commonly 50/50).
• Change about every 2 years/40,000–50,000 km, or as per the handbook.
• Never open the cap hot, always bleed the system after refilling.

FAQs

What coolant type suits a 1998 Pajero?
For this model, an ethylene glycol–based coolant with the correct corrosion inhibitors (as specified by Mitsubishi for alloy engines) is recommended. Many owners use a conventional green long-life coolant, the key is meeting Mitsubishi’s spec and not mixing different chemistries. Pair it with demineralised water at around a 50/50 ratio unless local conditions dictate otherwise.

How often should the coolant be changed?
For most 1998 Pajeros, plan on every 2 years or about 40,000–50,000 km. If using a genuine long-life product that specifies a longer interval, follow the handbook. Regardless of interval, check level and condition regularly—discolouration, debris or a weak-looking mix means it’s time.

How much coolant does it take?
Capacity varies with engine and heater configuration, but many 1998 Pajeros are in the ballpark of roughly 9–10 litres for the total system. Always confirm the exact capacity and bleed procedure in the factory manual or owner’s handbook to avoid air pockets and underfilling.