Parts for your 2006 Mitsubishi Pajero-Head gasket

2006 Mitsubishi Pajero head gasket — what it does and how to look after it

Based on technical publications from Mitsubishi Motors — the 2006 Pajero/Montero/Shogun service manual (Engine group) — and the Mitsubishi ASA electronic parts catalogue, the 2006 Pajero engines (notably the 3.2‑litre 4M41 DI‑D and 3.8‑litre 6G75 V6) use a cylinder head gasket. Independent manuals such as Haynes/Gregory’s for Pajero 1997–2009 also detail head‑gasket removal, torque sequences and specs. So a head gasket is absolutely relevant on a 2006 Mitsubishi Pajero.

On this Pajero, the head gasket sits between the engine block and the cylinder head, sealing three critical zones at once: high‑pressure combustion, coolant passages and oil galleries. It keeps compression where it belongs and stops oil and coolant from mixing — key to power, reliability, and keeping temps in check on long Kiwi and Aussie runs. Most examples use a multi‑layer steel (MLS) gasket, designed to handle thermal cycling and cylinder pressures, provided the mating surfaces are flat and clean.

When replacement becomes necessary, it’s usually because of overheating, age, or surface damage. Sensible servicing reduces the odds: fresh coolant at the intervals, a healthy radiator, proper cap pressure, and a thermostat that opens on cue. For the 4M41 diesel, make sure the cooling system, viscous fan and EGR cooler aren’t quietly causing hot spots that cook the gasket. For the 6G75 V6, keep an eye on timing‑belt age, as overheat events from a neglected pump or belt job can cascade into gasket grief.

• Watch for tell‑tales: unexplained coolant loss, pressurised hoses from cold, white exhaust steam, sweet smell from the exhaust, milky residue under the oil cap, rough cold start, or bubbles in the expansion tank.
• If replacing: use an OEM‑quality MLS gasket, fit new torque‑to‑yield head bolts, and follow the factory torque‑angle sequence from the service manual. Check head and block flatness and surface finish to the spec — MLS gaskets are fussy about that.
• While in there: pressure‑test the head, inspect injectors (4M41), renew the thermostat, consider the water pump, and flush the radiator. Bleed the cooling system thoroughly with the heater on hot and refill with the correct Mitsubishi long‑life coolant mix.

A tidy, by‑the‑book job restores compression, stabilises temperatures, and keeps the Pajero ready for corrugations, towing and long kilometres without drama.

FAQs

What are the common signs of a failing head gasket on a 2006 Pajero?
Typical clues include overheating, coolant loss with no visible leak, white steam from the exhaust, a sweet smell, rough idle on start‑up, creamy residue under the oil cap, and bubbles in the expansion tank. A chemical block‑test for combustion gases in the coolant is a quick confirmation.

Can it be driven with a suspected head‑gasket leak?
Best not. Even short trips can escalate damage, warping the head, contaminating bearings with coolant, and stranding the vehicle. If it must be moved, drive gently, keep revs down, and stop at the first sign of temp creep — but booking a tow is the safer play.

What does head‑gasket replacement usually cost and how long does it take?
Across Australia and New Zealand, expect roughly AUD/NZD $2,000–$4,500 depending on engine (4M41 vs 6G75), machining needs, and extras like water pump, thermostat and belts. Labour time commonly lands around 12–18 hours, varying with shop and condition.