Parts for your 2004 Mitsubishi Pajero-Exhaust gasket

2004 Mitsubishi Pajero exhaust gasket: what it does and how to look after it

Yes, the 2004 Mitsubishi Pajero does use exhaust gaskets. Factory references including the Mitsubishi NM/NP Pajero Factory Service Manual (Exhaust section) and the Mitsubishi ASA electronic parts catalogue list multiple gaskets and sealing rings across the system for both the 3.2 Di‑D (4M41) diesel and the V6 petrol variants. These include manifold‑to‑cylinder‑head gaskets, manifold or turbo outlet to front pipe “donut”/ring gaskets, turbocharger flange gaskets on the diesel, and small gaskets on EGR and crossover pipes. So the exhaust gasket is absolutely relevant to this model year.

On this Pajero, exhaust gaskets are thin, heat‑resistant seals that sit between hot, bolted flanges. Their job is simple but critical: keep combustion gases inside the exhaust stream, maintain correct back‑pressure (and boost on the diesel), quieten the system, and protect nearby components from hot leaks. When they fail, owners often notice a ticking noise on cold start, a whiff of exhaust under the bonnet, soot tracks around a joint, or—on the 4M41—sluggish turbo response.

There’s no fixed kilometre interval for exhaust gasket replacement, they’re replaced when disturbed or when leaking. As part of routine servicing on a 2004 Pajero, it’s smart to give the system a quick once‑over at each service and a more careful inspection every 20,000–30,000 km, especially if it sees towing, beach work, or corrugations. Look for cracked heat shields, missing spring bolts at the front pipe, and any black soot lines around flanges.

• Listen for a sharp “tick” that fades as it warms up—often a manifold gasket.
• Check for exhaust smell in the cabin or engine bay—address immediately for safety.
• On diesel, watch for drop in boost or louder turbo whistle—could be a turbo flange leak.

When replacing gaskets, follow the factory torque specs and tightening sequence. Soak old fasteners with penetrant, use new nuts/springs on donut joints, and clean mating faces back to bright metal. A dab of high‑temp anti‑seize on studs (not on gasket faces) helps the next time. If a manifold gasket has blown, inspect manifold flatness and the condition of studs, heat cycling can warp or snap them. After reassembly, a quick smoke test or soapy‑water test on a cold start helps confirm a gas‑tight seal—handy for keeping it quiet, legal for roadworthy/WOF, and kind to O2 sensors and turbos.

FAQs

Does a 2004 Mitsubishi Pajero have exhaust gaskets, and where are they?
Yes. They’re at the manifold‑to‑head, turbo‑to‑manifold and turbo‑to‑downpipe (diesel), front pipe donut/flange, EGR pipe joints, and various flange joints further down the system. The exact count varies by engine and exhaust layout.

What are the signs an exhaust gasket needs replacing on a 2004 Pajero?
Common clues include a ticking noise on cold start, exhaust smells, visible soot marks at a joint, rough idle or poor fuel trims, and on the diesel, reduced boost or hazy acceleration. Any fumes in the cabin mean stop and fix it.

Can it be driven with a blown exhaust gasket?
Best not. Leaks can let fumes in, skew O2 sensor readings, stress the turbo on the diesel, and attract defect notices for noise. Short trips to a workshop are usually fine, but prompt repair is the go.