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, the manual will state what’s needed for your engine.

Smart owners tidy up related items while they’re under the bonnet. Fresh coolant of the correct spec, a new thermostat and radiator cap, and a health check of the viscous fan clutch and water pump all help keep temps under control. On diesels, confirm injector and pump timing, on the 6G72 V6, it’s a great time to do the timing belt, idlers, cam and crank seals, and the water pump. A well-fitted quality gasket plus a healthy cooling system gives the Pajero a long, drama-free run—perfect for long Kiwi or Aussie kilometres.

• Watch for early symptoms to avoid head and block damage.
• Use quality parts and adhere strictly to torque specs and sequences.
• Prioritise cooling system condition to prevent repeat failures.

Popular question: What are common signs of a blown head-gasket on a 1993 Pajero?

Look for hard starting, overheating on climbs, bubbling in the overflow bottle, coolant loss with no visible leak, white exhaust on warm-up, or chocolate-milk oil. A block test or a compression/leak-down test helps confirm it before teardown.

Popular question: Is a head-gasket replacement a DIY job on this model?

It’s doable for experienced home mechanics with a torque wrench, angle gauge, and the factory procedure, but it’s a big job. Expect timing belt alignment on the 6G72 and careful fuel timing checks on diesels. Many owners choose a professional for machining, pressure testing, and warranty on the work.

Popular question: Should the head bolts be replaced?

If the engine uses torque-to-yield bolts (common on these), replace them. Even on non-TTY setups, fresh bolts are cheap insurance. Always follow the specified tightening sequence and angle stages listed in the workshop manual.