Parts for your 1992 Mitsubishi Pajero-Ignition leads

1992 Mitsubishi Pajero ignition leads — what’s fitted and how to look after them

Based on factory literature for the V20 series — including the Mitsubishi Pajero/Montero Workshop Manual (1991–1996), Gregory’s Pajero Manual (AU/NZ) and Haynes Montero/Pajero Repair Manual — ignition leads are fitted to 1992 Pajero petrol engines (notably the 3.0L V6 6G72 with a distributor). These models use high-tension leads between the distributor and spark plugs. By contrast, the diesel variants (such as the 2.5L 4D56T) are compression-ignition engines with glow plugs and no spark plugs, so they don’t use ignition leads at all.

For diesel owners wondering why there are no leads: the 4D56T and other diesel options ignite fuel from heat generated by compression, not by an electrical spark. The system uses glow plugs for cold starts and a diesel injection pump — no distributor, no coil, and therefore no ignition leads.

For petrol 1992 Pajero models that do have ignition leads, this part plays a quiet but critical role. The leads carry high-voltage spark from the coil and distributor to each spark plug, lighting off the fuel-air mix in each cylinder. Good leads mean clean starts, smooth idle and decent fuel economy, tired leads mean misfires, hesitation under load and that annoying nighttime light show of stray arcing under the bonnet.

Servicing is straightforward and well worth it on an older Pajero. Most workshop guides suggest inspecting leads at every service and replacing them roughly every 60,000–100,000 km or five years — sooner if there’s cracking, swelling, oil saturation or green corrosion at the terminals. Resistance can be checked with a multimeter, acceptable values vary by brand and length, so it’s best to compare each lead in the set and follow the manual’s specs. Any outlier with very high resistance deserves retirement.

A few practical tips make the job easier:

• Replace leads one at a time to keep the firing order spot on, label them before removal.
• Always pull on the boot, not the cable. A gentle twist breaks the seal without tearing the core.
• Use a dab of dielectric (silicone) grease in each boot for easier future removal and better moisture sealing.
• Clip and route the leads in the factory looms, keeping them off the exhaust manifolds and away from sharp edges.
• Consider replacing the distributor cap, rotor and spark plugs at the same time — it’s a small extra step that often restores a tired ignition.

Quality silicone-jacket, spiral-wound (suppressed) leads cope better with heat in the Pajero’s engine bay and keep radio noise down. If the vehicle is still on its original leads from the early ’90s, it’s well past time for a fresh set.

Popular questions

Do 1992 Pajero diesels have ignition leads?
No — diesel versions like the 2.5L 4D56T use glow plugs and compression ignition, so there are no spark plugs or high-tension leads. That’s why “ignition leads” listings don’t apply to diesel models.

How often should ignition leads be replaced on a 1992 Pajero V6?
A good rule in local conditions is every 60,000–100,000 km or five years. Replace sooner if there are misfires, visible cracks, oil contamination, or high resistance when tested with a multimeter.

Can different brands or lengths of leads be mixed?
It’s best to fit a matched set. Mixing can change resistance and routing lengths, which may invite crossfire or arcing. Use the correct lengths and clip them into the factory retainers.