Parts for your 2014 Mitsubishi Asx-Exhaust gasket

2014 Mitsubishi ASX exhaust gasket: purpose, care and when to replace

Yes — the 2014 Mitsubishi ASX uses exhaust gaskets. Technical sources including the Mitsubishi Motors Service Manual for ASX/RVR/Outlander Sport (2013–2015, Group 15 – Exhaust) and the Mitsubishi ASA Electronic Parts Catalogue (EPC) for the 2014 ASX GA/GAW series show gaskets at the exhaust manifold-to-cylinder head joint, at the front pipe/catalyst flange (often a “donut” or crush ring), and, on diesel models, at the turbocharger outlet to downpipe. These seals are factory-fitted parts and are replaced whenever the joint is disturbed or a leak is diagnosed.

On the ASX’s petrol 4B11 and market-dependent diesel options, exhaust gaskets do a simple but vital job: they keep exhaust gases inside the system from the moment they exit the head. That prevents noisy ticking, hot gas leaks near sensitive components, and false readings at the oxygen sensors that can mess with fuel trims. A sound seal also helps the catalytic converter and DPF (diesel) do their work efficiently.

They’re not a routine “time-based” service item, but they are consumables. Whenever the exhaust is apart — say, to swap a manifold, front pipe, or turbo — new gaskets should go in. It’s cheap insurance against leaks that can lead to cabin fumes, MOT/WOF failures, or an annoying exhaust note on cold start.

Typical signs the ASX may need an exhaust gasket include a sharp ticking or hissing at start-up that softens as the metal expands, a sooty stain around a flange, exhaust smell near the engine bay, rough idle, or a check engine light from skewed O2 readings. If any of these show up, a pressure/smoke test or a careful listen around the joints is the next step.

When replacing, use quality OEM-spec multi-layer steel (manifold) and the correct crush-ring or flange gasket type for the joint. Clean and true the mating faces, fit new hardware where specified, and torque fasteners to the Mitsubishi manual’s values in the proper sequence. After the first heat cycle, it’s smart to re-check accessible flange nuts. Avoid sealants unless the service manual explicitly allows a high-temp product at a given joint.

Done right, a fresh set of gaskets restores that quiet, tight seal the ASX left the factory with — and keeps the engine management happy, the cabin fume-free, and the rego inspectors smiling.

Technical references: Mitsubishi Motors Service Manual (ASX/RVR/Outlander Sport 2013–2015, Group 15 – Exhaust)