Parts for your 2003 Mitsubishi Pajero-Manifold gasket

2003 Mitsubishi Pajero Manifold Gasket — What It Does and When to Replace It

The 2003 Mitsubishi Pajero (NM/NP series) does use manifold gaskets—intake and exhaust. Mitsubishi’s NM/NP factory Service Manual (2000–2006) details gasket replacement and torque sequences for 4M41 3.2 Di‑D and 6G74/6G75 V6 engines, and the Mitsubishi ASA electronic parts catalogue lists the corresponding gaskets. Technical sources like the Mitsubishi workshop manual (Engine, Intake and Exhaust Manifold sections) and the ASA EPC confirm their fitment and service procedures, so a manifold gasket is absolutely relevant to engine sealing and reliability.

Purpose: The intake manifold gasket seals the manifold-to-head joint so the engine only breathes metered air (and, on the diesel, boosted air), avoiding vacuum/boost leaks that cause rough idle, soot, over‑fuelling, or fault codes. The exhaust manifold gasket seals hot gas leaving the head, preventing ticking leaks, fumes in the cabin, and oxygen‑sensor upset. Both gaskets cope with heat and expansion, protecting alloy heads from fretting.

Service advice: Replace the gasket any time the manifold comes off. Clean mating faces with plastic/brass scrapers, avoid gouging the alloy head, and finish with solvent on a lint‑free rag. Don’t add RTV unless the manual specifies it. Renew dodgy fasteners, align on dowels, and torque in the criss‑cross pattern in stages. On high‑kilometre Pajeros, check the exhaust manifold for warpage or cracks and renew EGR, throttle body, and crossover gaskets as needed. If carbon tracking or pitting is present, lightly dress the manifold face or replace it. After reassembly, smoke‑test the intake (diesel especially) and listen for cold‑start ticking on the exhaust side.

Maintenance: There’s no set interval