Parts for your 2006 Mitsubishi Pajero-Drive belt pulley

2006 Mitsubishi Pajero Drive-Belt Pulley — What It Does and When to Replace It

A drive-belt pulley absolutely is fitted to the 2006 Mitsubishi Pajero. Technical references including the Mitsubishi workshop manual for the NS/NT Pajero range (2006-on), the Mitsubishi ASA parts catalogue, and aftermarket application catalogues from Gates and Dayco all show a V‑ribbed accessory belt system with multiple pulleys: the crankshaft (harmonic balancer) pulley, an automatic tensioner pulley, one or more idler pulleys, and accessory pulleys on the alternator, power steering pump and air‑conditioning compressor. Many 4M41 3.2 Di‑D diesels also use an overrunning alternator pulley (OAP/decoupler).

On this Pajero, the drive-belt pulleys guide and drive the auxiliary belt(s) that power critical gear like the alternator, power steering and A/C. The crankshaft pulley—often a rubber-damped harmonic balancer—transfers engine rotation to the belt. The tensioner and idlers keep the belt routed correctly and at the right tension, while accessory pulleys ride along on bearings to keep everything spinning smoothly. If any pulley drags, wobbles or seizes, the belt can slip, shred or jump, which risks a flat battery, heavy steering or no A/C.

Good servicing treats pulleys and belts as a system. Regular checks are quick and save headaches on a long run up the coast or outback:

• Inspect belt ribs for cracks, glazing or frayed edges, replace the belt if it’s past it.
• Spin pulleys by hand with the belt off, any roughness, play or noise means new pulley time.
• Watch for wobble at idle, rubber delamination or vibration from the crank pulley/damper.
• Listen for chirps (misalignment), squeals (slip) and growls (bearing wear).

When replacing a pulley on the 2006 Pajero, it’s smart to fit a new belt and inspect the automatic tensioner. Many diesel models use an overrunning alternator pulley, if it’s seized or freewheels the wrong way, expect belt flutter and harsh engagement—replace it with the alternator off the vehicle using the correct spline tool. Some variants run a separate A/C belt, so check both circuits. Avoid levering on pulley flanges, hold the centre and torque fasteners to spec from the workshop manual. In Aussie and Kiwi conditions—heat, dust, towing and corrugations—inspect at every service and expect belts every 60–100,000 km or 4–6 years, with pulleys as needed. Quality parts matter here: a fresh belt and quiet, true-running pulleys keep the Pajero charging strong and steering light, whether it’s the 3.2 Di‑D or 3.8 V6 6G75.

How often should the drive-belt pulleys and belts be replaced on a 2006 Pajero?

Have them inspected at every service. Belts typically last 60–100,000 km or 4–6 years, depending on use and climate. Pulleys and the automatic tensioner are replaced on condition—any noise, play, wobble or roughness. The crankshaft damper may run much longer but should be checked for rubber deterioration and wobble.

What noises point to a bad pulley versus a worn belt?

A chirp at idle or when flicking the A/C on often points to misalignment or an alternator OAP issue. A continuous squeal suggests belt slip or contamination. A growl, rumble or whirr that changes with engine speed usually means a failing pulley bearing (idler or tensioner). Brief water mist on the belt can help differentiate slip (noise changes) from bearing noise (unchanged).

Does the 3.2 Di‑D use an overrunning alternator pulley, and should it be replaced?

Most 4M41 3.2 Di‑D Pajeros of this era use an overrunning alternator pulley. If it seizes, the belt can flutter and tensioners cop a hiding, if it freewheels incorrectly, charging may be erratic. It’s wise to assess the OAP whenever the alternator is out, and replace it with the correct tool if there’s play, roughness or one-way clutch faults.