Parts for your 1987 Mitsubishi Pajero-Harmonic balancers

1987 Mitsubishi Pajero Harmonic Balancer — Purpose, Use and Service Advice

Based on technical references including the Mitsubishi factory workshop manual for the first‑generation Pajero/Montero, the Mitsubishi ASA electronic parts catalogue, and common aftermarket catalogues (Dayco, Gates, PowerBond), the 1987 Mitsubishi Pajero is fitted with a crankshaft vibration damper, commonly called a harmonic balancer. Listings exist for the popular 2.6L petrol (4G54) and diesel variants (4D55/4D56), confirming this part is relevant to the model year.

On a 1987 Pajero, the harmonic balancer sits at the nose of the crankshaft and is bonded with a rubber layer between the inner hub and the outer pulley ring. Its job is to soak up torsional vibrations created as each cylinder fires, keeping crank twist under control. That protects the crank, timing components and accessories, reduces belt chatter, and helps keep the engine smooth under load—handy when the wagon is crawling up a rocky track or towing the boat to the bach.

As part of regular servicing, it’s sensible for owners and technicians to inspect the balancer every service interval. Age hardens the rubber after decades of Kiwi and Aussie summers, and vehicles this vintage often show:

• Cracked or perished rubber between the hub and outer ring
• Visible pulley wobble at idle
• Belt misalignment, squeal, or frayed belts
• Timing marks that “walk” or won’t stay steady with a timing light
• Oil contamination that’s softened the rubber bond

If any of that’s present, replacement is the go. Choose a quality OEM‑equivalent or a reputable aftermarket balancer listed for the exact engine code. During the job, use the correct holding tool, align the keyway properly, and tighten the crank bolt to the factory torque spec from the workshop manual. On timing‑belt engines, confirm timing marks and belt tracking before firing up. It’s also a good time to check the front crank seal, accessory belts, and engine mounts, as extra movement can accelerate balancer wear.

Out on corrugations and with plenty of low‑range work, the balancer earns its keep by protecting the bottom end. A well‑fitted, healthy unit helps the old Paj keep its trademark reliability for plenty more kilometres under the bonnet.

Popular questions about 1987 Mitsubishi Pajero harmonic balancers

Does a 1987 Pajero actually have a harmonic balancer?
Yes. Factory documentation and the Mitsubishi ASA parts catalogue specify a crankshaft vibration damper for the first‑gen Pajero engines, and major aftermarket catalogues list direct replacements for the 4G54 petrol and 4D55/4D56 diesels.

How long do they last on an older Pajero?
Many original balancers make it well past 200,000 km, but after 35+ years the rubber layer can perish regardless of mileage. Any signs of cracking, wobble, or creeping timing marks mean it’s time to replace rather than risk further damage.

Any special tools or tips for replacement?
A proper crank pulley holding tool, quality puller, and a torque wrench are must‑haves. Follow the workshop manual for torque and any thread‑locker requirements. Align the keyway, verify timing marks, and recheck belt alignment and tension once it’s back together.