Parts for your 2004 Mitsubishi Pajero-Oil seals

2004 Mitsubishi Pajero Oil Seals — What They Do and When to Replace Them

Oil seals are absolutely fitted to the 2004 Mitsubishi Pajero. This isn’t guesswork—Mitsubishi’s NM/NP Pajero Workshop Manual (2000–2006), the Mitsubishi ASA parts catalogue, and major seal manufacturers’ catalogues (e.g., NOK, SKF) all list multiple oil seals for this model across the engine, transmission, transfer case and differentials. That includes front and rear crankshaft seals, camshaft seals on the V6, diff pinion and side shaft seals, and several output/input seals on the auto/manual gearbox and Super Select transfer case.

On a 2004 Pajero, oil seals keep engine, gearbox and diff oil where it should be, stop dust and water getting in, and help maintain correct pressures and lubrication so bearings and gears live a long, drama-free life. Common spots you’ll find them are the crankshaft nose behind the crank pulley, the rear main at the back of the engine, the camshafts on V6 models, the transmission and transfer case output shafts, and the differential pinion and side shafts.

There’s no strict time-based replacement interval—seals are typically changed when they start weeping or when a related job makes access easy. Smart servicing on a 2004 Pajero looks like this:

• During a timing belt service on V6 models (around 100,000–105,000 km), replace the front crank and cam seals while it’s all apart.
• When the gearbox is out for a clutch (manual) or major auto service, fit a new rear main seal and inspect the rear housing gasket.
• If there’s oil mist around the bellhousing, front pulley, diff yokes, or transfer case outputs, plan a seal replacement rather than topping up forever.

A few pro tips make a big difference: use quality OEM-spec seals (NOK is often the factory supplier), clean and lightly oil the new seal lip, and drive it in square to the correct depth. If the shaft has a wear groove, consider a repair sleeve. Always check crankcase and diff breathers—blocked breathers build pressure and force oil past good seals. On petrol V6s, a tired PCV valve can also encourage leaks.

Some jobs are straightforward with a seal puller and driver, others are specialist. Diff pinion seals need correct preload after refit, and the rear main involves gearbox removal. If in doubt, hand it to a trusted workshop so it’s sealed once and sealed right.

Popular questions about 2004 Mitsubishi Pajero oil seals

Where do Pajero oil seals most commonly leak from?

Typical culprits are the front crank seal (oil around the crank pulley), the rear main (oil at the bellhousing join), diff pinion seals (slinging oil onto the underbody), and transfer case output seals (oil on the tailshaft area). On V6 models, cam seals can mist oil behind the timing covers.

How can someone tell an oil seal is on the way out?

Look for fresh oil weeping rather than old grime, oil drops under the vehicle after parking, or a low dipstick between services. A light film isn’t urgent, but active drips, oil on belts, or oil onto the exhaust need prompt attention.

Should seals be replaced preventatively?

Yes—when access is easy. Replace the front crank and cam seals during a V6 timing belt job, and the rear main during a clutch or gearbox-out service. It’s cheap insurance compared with paying full labour later for the same access.