Parts for your 2005 Mitsubishi Pajero-Drive belt pulley

2005 Mitsubishi Pajero drive-belt pulley — purpose, service tips and when to replace

Technical sources confirm that the 2005 Mitsubishi Pajero uses drive-belt pulleys. The Mitsubishi Pajero/Montero workshop manual for the V60/V70 series (2000–2006) details a serpentine/accessory drive with a crankshaft pulley (harmonic balancer), idler and automatic tensioner pulleys. Australian and New Zealand application catalogues from Gates and Dayco also list the accessory belt, idler(s) and tensioner pulleys for 2005 3.2 Di‑D diesel and 3.5/3.8 V6 petrol models. So, a drive-belt pulley is very much relevant on this vehicle.

On a 2005 Pajero, the drive-belt pulley system transfers crankshaft rotation to essentials like the alternator, power steering pump and A/C compressor. The crank pulley (harmonic balancer) damps engine vibrations, while idler and tensioner pulleys guide and maintain belt tension so everything spins smoothly. If any pulley degrades, the belt can slip, squeal or wander, leading to undercharging, heavy steering or a hot cabin with no A/C — not ideal on a long Kiwi or Aussie roadie.

As part of routine servicing, it’s smart to inspect the belt and pulleys at each service. Look for cracked or glazed belt ribs, pulley wobble, rust dust, frayed edges or a dry, chirpy bearing noise that’s louder on cold start. A healthy pulley spins freely without roughness or play, and runs dead true with the belt. On higher‑kilometre Pajeros, replacing the automatic tensioner and idler(s) when fitting a new belt is good preventative maintenance — it saves doing the same job twice.

Typical intervals vary with use, but many workshops in AU/NZ check the drive-belt system at every service and expect a new belt roughly every 90,000–100,000 km (earlier if there’s noise, contamination or cracking). Pulleys should be replaced immediately if noisy, loose, seized or out of alignment. If oil or coolant has soaked the belt, clean the area, fix the leak and replace the belt, don’t rely on belt dressings. When fitting parts, confirm the correct belt routing decal under the bonnet (or workshop guide), set the tensioner correctly, and spin each pulley by hand to feel for roughness. After start-up, watch for steady tracking with no flutter. For both 3.2 Di‑D and V6 petrol models, a quiet, steady belt run and no bearing growl means the job’s a good one.

• Warning signs: squeal on start-up, intermittent chirp, visible wobble, hot rubber smell, charging or steering complaints.
• Best practice: replace belt, tensioner and idler(s) together on high kilometres, inspect the harmonic balancer for delamination.

FAQ — 2005 Mitsubishi Pajero drive-belt pulley

What are the common signs a Pajero drive-belt pulley is failing?
Tell-tales include a chirp or squeal (especially cold), visible pulley wobble, rust-coloured dust near a pulley, or a rough/gritty feel when it’s spun by hand. You might also notice low charging voltage, heavy steering or the A/C cycling oddly because the belt is slipping.

If the harmonic balancer is failing, you may see the outer ring walking or rubber delamination. Any of these symptoms means it’s time to replace the suspect pulley and recheck belt alignment.

Should the tensioner and idler be replaced with the belt?
On higher kilometres, yes — it’s good practice. The labour overlaps heavily, and a tired bearing or weak tensioner spring will quickly ruin a brand-new belt. Many techs in AU/NZ treat belt, tensioner and idler(s) as a kit on 3.2 Di‑D and V6 Pajeros when wear is evident.

If the pulleys are quiet, tight and spin smoothly, they can be left, but keep a closer eye on them and recheck at the next service.

Is it safe to drive with a noisy pulley?
Best not. A noisy pulley can seize or shed, taking the belt with it. That can mean sudden loss of charging, power steering assist and A/C — and a bigger bill. If there’s noise, book it in promptly and avoid long trips until it’s inspected.