Parts for your 1993 Mitsubishi Pajero-Head gasket

1993 Mitsubishi Pajero head-gasket: purpose, checks, and service tips

Yes, a head-gasket is absolutely used on the 1993 Mitsubishi Pajero. Factory sources including the Mitsubishi Pajero NH–NJ (1991–1996) Factory Service Manual, the 4D56 and 4M40 Diesel Engine Workshop Manuals, the 6G72 V6 Engine Service Manual, and Mitsubishi’s ASA electronic parts catalogue all specify a cylinder head gasket for the common engines fitted in 1993 (4D56 2.5 TD, 4M40 2.8 TD, and 6G72 3.0 V6). So the part is relevant to every 1993 Pajero with a conventional cylinder head.

On this Pajero, the head-gasket sits between the cylinder head and the engine block, sealing combustion pressure while keeping coolant and engine oil in their own passages. It’s the unsung hero that lets the donk make proper compression without mixing fluids. Most quality replacements today are multi-layer steel (MLS), though some earlier builds used composite types.

It’s not a scheduled service item, but it should be replaced if there are signs of failure or if the head is off for other work. Typical red flags include overheating, unexplained coolant loss, pressurised hoses from cold, white exhaust mist, sweet-smelling vapour, bubbles in the radiator, or milky oil. Before diving in, a cooling system chemical test, compression or leak-down test, and an exhaust-gas-in-coolant test help confirm the diagnosis.

When replacing the head-gasket on a 1993 Pajero, following the workshop manual is key. Clean mating surfaces, check head and block flatness and surface finish, and have the head pressure-tested for cracks—especially on 4M40 diesels, which don’t love being overheated. Use new head bolts if they’re torque-to-yield, follow the exact torque-and-angle sequence, and don’t skip the final angle turns. Many modern MLS gaskets don’t require re-torque