Parts for your 1988 Mitsubishi Pajero-Manifold gasket

1988 Mitsubishi Pajero manifold gasket — what it does and when to replace it

Yes, a manifold gasket is absolutely used on a 1988 Mitsubishi Pajero. Both the intake manifold gasket and the exhaust manifold gasket are specified in the factory literature, including the Mitsubishi Motors Pajero Workshop Manual (1983–1991, Engine sections: Intake and Exhaust Manifolds) and common service guides such as the Haynes Mitsubishi Pajero 1983–1996 Repair Manual and Gregory’s Pajero 1983–1996. These sources list the gaskets as standard service and overhaul items across typical 1988 engines like the 2.5L 4D56 diesel, the 2.6L 4G54 petrol, and the 3.0L 6G72 V6 where fitted.

The manifold gasket’s job is straightforward but critical. On the intake side, it seals the manifold to the cylinder head to maintain correct vacuum and air–fuel delivery, preventing lean running and rough idle. On the exhaust side, it keeps hot gases from escaping before the turbo (on diesels) or before the downpipe, which protects nearby components, preserves torque, and keeps noise and emissions in check. Materials vary—graphite, composite, multi-layer steel, and metal crush rings are all used depending on engine and position.

As part of regular servicing, it’s worth inspecting for leaks, loose fasteners, heat staining, or sooty marks around the exhaust manifold, and for hissing or fuel odours around the intake. A ticking noise on cold start that fades warm often points to an exhaust leak. Turbo-diesel owners may also notice slower spool or a whiff of fumes in the cabin if the gasket is gone.

• Common symptoms of a failing manifold gasket:
  • Rough idle, poor economy, or a lean code after intake work
  • Ticking/whistling under load, soot tracks, or fumes near the exhaust manifold
  • Boost loss (4D56T) and exhaust smell under the bonnet

1. Always fit a new gasket after removing the manifold