Parts for your 1993 Mitsubishi Pajero-Exhaust gasket

1993 Mitsubishi Pajero exhaust-gasket: what it does and when to replace it

Yes, the 1993 Mitsubishi Pajero uses exhaust-gaskets. Technical sources including the Mitsubishi Factory Service Manual for the V2x-series Pajero/Montero (1991–1999) and the Mitsubishi ASA electronic parts catalogue specify several exhaust-gaskets on this model: a gasket between the cylinder head and exhaust manifold, a “donut” gasket at the manifold-to-front pipe joint, plus turbo outlet/downpipe and EGR pipe gaskets on diesel variants such as the 4M40 and 4D56. Aftermarket repair manuals covering these years confirm the same layout and servicing approach.

On a 1993 Pajero, the exhaust-gasket’s job is to keep hot gases sealed in the exhaust stream so the system stays quiet, safe, and efficient. It prevents fumes sneaking into the cabin, avoids the tell‑tale tick on cold starts, and helps the engine management stay happy on petrol models (like the 6G72 V6) by protecting oxygen sensor readings from fresh‑air dilution. On turbo diesels, a healthy gasket also keeps boost and response crisp.

There’s no fixed time or kilometre interval to replace an exhaust-gasket. The best practice—which the factory manual and parts references support—is to inspect during servicing and replace the gasket anytime a joint is disturbed. If the manifold or front pipe has been off, fit a new gasket and, where specified, new spring bolts or studs and nuts.

• Common clues it’s time: a sharp ticking or hissing on start-up, soot traces around a flange, an exhaust odour under the bonnet, sluggish boost on diesels, or a louder than usual note.

Replacement tips for the 1993 Pajero: work on a stone‑cold exhaust, soak fasteners with penetrant, and clean both mating faces until smooth. Check the manifold for warping or cracks (not uncommon on high‑mileage diesels). Use the correct gasket type—multi‑layer steel at the head-to-manifold, a crush “donut” at the front pipe, and proper metal/composite gaskets at turbo/EGR joints. Avoid generic sealants unless the manual explicitly allows an oxygen‑sensor‑safe product. Tighten hardware evenly in the factory sequence, run the engine to heat-cycle, then recheck for leaks.

Whether it’s the 6G72 petrol or 4M40 diesel, these details mirror the factory documentation and common kit contents. Leaving a leak can lead to WOF or roadworthy/rego issues in NZ and Australia, not to mention fumes and lost performance, so sorting the exhaust-gasket promptly is a smart bit of preventative maintenance.

Popular questions about 1993 Mitsubishi Pajero exhaust-gasket

How do I tell if the exhaust-gasket has blown on a 1993 Pajero?
Owners usually notice a ticking or hissing from the engine bay, most obvious on a cold start, plus a faint exhaust smell. Sooty marks around the manifold or front pipe flange are a giveaway. On turbo diesels, a leak near the turbo or manifold can also dull boost and throttle response.

If the noise quietens as the engine warms, then returns under load, it’s worth inspecting the gaskets and fasteners and replacing the affected gasket before it erodes the mating surfaces.

Do I need sealant with a new exhaust-gasket?
Generally, no. The factory setup on the Pajero relies on properly matched metal or composite gaskets and correct clamping force. Sealant can interfere with the gasket seating and may not be oxygen-sensor safe on petrol models.

Only use a specified sealant if the factory service manual calls for it at a particular joint. Otherwise, clean faces, correct gasket orientation, and even tightening are the keys.

Is it safe to drive with a small exhaust leak?
It might seem minor, but it’s not ideal. Exhaust leaks can allow fumes into the cabin, skew sensor readings on petrol engines, and increase turbo lag on diesels. They can also worsen quickly and may cause a WOF or roadworthy/rego fail.

Short trips to a workshop are usually fine with good ventilation, but it’s best to repair the leak promptly to protect performance and safety.