Parts for your 1986 Mitsubishi Pajero-Radiator hose

1986 Mitsubishi Pajero radiator hose — purpose, care and replacement

Yes, a radiator hose is absolutely used on the 1986 Mitsubishi Pajero. Technical references including the Mitsubishi Pajero (L040 series, 1983–1991) factory service manual cooling system section, the Mitsubishi ASA electronic parts catalogue, and major hose catalogues (e.g., Gates and Dayco) all list upper and lower radiator hoses for both the 2.6‑litre petrol (4G54) and the turbo‑diesel engines of this model year. That means this Pajero relies on radiator hoses to move coolant between the engine and the radiator under the bonnet.

The radiator hose set does a simple but vital job: the upper hose carries hot coolant from the thermostat housing to the radiator, and the lower hose feeds cooled fluid back to the water pump. On a hard‑working 1986 Pajero—whether it’s towing, beach driving, or tackling backroads—hose condition can make or break cooling performance. Made from reinforced rubber, hoses age with heat cycles, pressure and any stray oil. Over time they can harden, crack, swell at the clamps or turn soft and spongy.

As part of regular servicing, it’s wise to inspect the radiator hoses every service or 10,000 km, and replace them about every 5–7 years, sooner if they show wear. Pair hose checks with coolant changes (typically every 2 years/40,000 km) and make sure the system is bled properly to avoid air pockets. For this era Pajero, always match hoses to the engine type and body code, as the shapes and lengths differ between the 2.6 petrol and the diesel variants.

• Red flags: visible cracks, bulges, kinks, soft spots, frayed fabric, coolant staining at clamps, sweet coolant smell after a run, rising temps under load.
• Good practice: replace spring clamps with quality worm‑drive or constant‑tension clamps, and clean the spigots before refitting.

1. Let the engine cool fully and open the radiator tap to drain into a container.
2. Loosen clamps, twist the hose gently to break the seal, then remove.
3. Clean mating surfaces, fit the new hose in the correct orientation.
4. Tighten clamps evenly, refill with the correct spec coolant mix, and bleed air.
5. Warm the engine, check for leaks, and recheck coolant level after a short drive.

Look after the hoses and the Pajero’s cooling system will stay happy, even on long Kiwi and Aussie kilometres.

Popular questions about 1986 Mitsubishi Pajero radiator hoses

How often should radiator hoses be replaced on a 1986 Pajero?
Typically every 5–7 years or around 100,000 km, but inspect each service. If the vehicle sees lots of heat, towing, corrugations or oil exposure, replace earlier.

What are the signs a Pajero radiator hose is failing?
Cracks, soft or mushy sections, bulging near clamps, coolant smell, persistent top‑ups, and creeping temperatures on hills are all clues a hose is on the way out.

Do petrol and diesel 1986 Pajeros use the same hoses?
No. The 2.6‑litre petrol and the turbo‑diesel engines use different hose shapes. Match by engine code and body series (L040) to get the correct upper and lower hoses.