Parts for your 1997 Mitsubishi Pajero-Exhaust gasket

1997 Mitsubishi Pajero exhaust gasket — what it does and when to replace it

Technical sources including the Mitsubishi Pajero 1997 Workshop Manual (Engine: Exhaust Manifold/Exhaust System) and the Mitsubishi ASA electronic parts catalogue confirm the 1997 Pajero is fitted with multiple exhaust gaskets. These include the cylinder head–to–exhaust manifold gasket, front pipe “donut”/flange gaskets, and on 4M40 turbo-diesel models, turbocharger mounting and outlet gaskets. Major aftermarket catalogues (e.g., Fel‑Pro, Victor Reinz) also list exhaust manifold and flange gaskets specifically for this model year, reinforcing that exhaust gaskets are relevant and used.

On a 1997 Mitsubishi Pajero, the exhaust gasket’s job is to seal hot exhaust gases as they pass from the engine into the exhaust system. A healthy seal keeps the cabin free from fumes, maintains correct oxygen sensor readings on petrol engines, protects nearby components from heat and soot, and — on turbo-diesels — helps the turbo spool efficiently without boost or exhaust leaks.

During routine servicing, it’s smart to check for signs of leakage around the manifold, turbo (if fitted), and front pipe flanges. Look for dry black soot tracks, a sharp ticking noise on cold start that softens as it warms, or a whiff of exhaust in the cabin. Petrol V6s may log mixture-related fault codes if a leak occurs upstream of the O2 sensor, diesels can develop a whoosh under load if the turbo flange or downpipe joint leaks.

Best practice when replacing an exhaust gasket on a Pajero is straightforward: clean the mating faces, use the correct OEM-quality gasket type (MLS/composite for manifolds, crush ring/donut for front pipes), and fit new hardware where specified. Avoid smearing RTV on multi-layer steel manifold gaskets — the workshop manual calls for clean, dry assembly — and follow the cross-pattern torque sequence to the stated spec. If removing the front pipe, replace the donut gasket and inspect the spring bolts, weak springs won’t maintain clamp load after heat cycles.

Common workshop gotchas on these trucks include seized manifold nuts and studs, slight manifold warpage on high-kilometre vehicles, and heat-shield fasteners that shear. Penetrating oil and six-point sockets help, and any broken studs should be extracted and replaced before refitting. For 4M40 models, check turbo mounting nuts and the outlet/downpipe gasket while you’re there. A quick inspection every 10,000–15,000 kilometres fits neatly into regular service intervals and keeps the Pajero quiet, compliant, and towing happily.

• Symptoms to watch: ticking on start-up, soot at joints, exhaust smell, rough idle (petrol), whoosh under boost (diesel).
• Replace gaskets whenever a joint is disturbed, re-using old crush rings is false economy.
• Use stands and let the system cool — the exhaust stays scorching for ages after a drive.

Popular questions about 1997 Mitsubishi Pajero exhaust gaskets

Does a 1997 Pajero have exhaust gaskets?
Yes. The Pajero uses exhaust manifold gaskets at the cylinder head, flange/donut gaskets at the front pipe, and on 4M40 turbo-diesels, turbo-to-manifold and turbo outlet gaskets. These seals are part of normal servicing when joints are disturbed or leaks appear.

What are the signs an exhaust gasket is leaking on a 1997 Pajero?
Common clues include a sharp ticking noise on cold start, dry black soot marks around the manifold or flanges, a stronger exhaust smell, and on petrol engines, potential fault codes tied to lean readings. Turbo-diesels may produce a whooshing sound and lose a bit of low-end urge.

Is it safe to drive with a leaking exhaust gasket?
Short trips might be possible, but it’s not ideal. Leaks can let fumes enter the cabin, raise noise above legal limits, skew sensor readings on petrol engines, and reduce turbo efficiency on diesels. It’s best to repair promptly to avoid compounding issues and possible stud or flange damage.