Parts for your 1998 Mitsubishi Lancer-Exhaust gasket

1998 Mitsubishi Lancer exhaust gasket — what it does and when to replace it

Technical sources confirm the 1998 Mitsubishi Lancer does use exhaust gaskets. The Mitsubishi Motors Workshop Manual for CE/CK Lancer (Group 15 – Exhaust System), the Mitsubishi ASA electronic parts catalogue for 1998 Lancer models, and common service manuals such as Gregory’s/Haynes list multiple gaskets: a manifold-to-cylinder head gasket, a donut/ring gasket at the front pipe, and flat flange gaskets between the catalytic converter and the rest of the system. So yes, an exhaust gasket is absolutely relevant and fitted on a 1998 Lancer.

On a ’98 Lancer, exhaust gaskets keep the exhaust stream sealed from the engine’s ports right through to the mid-pipe flanges. They’re usually multi-layer steel (MLS) at the manifold-to-head, graphite/steel sandwich at flat flanges, and a crushable “donut” ring where the front pipe meets the manifold or catalytic converter. Their job is simple but critical: prevent leaks that cause tinny ticking noises, fumes in the cabin, loss of low-end torque, oxygen-sensor skewing, and WOF/RWC issues due to noise or emissions.

As part of routine servicing, it’s smart to give the Lancer’s exhaust joints a once-over. Look for black soot marks around flanges, a sharp ticking on cold start, or a sulphur/ exhaust smell near the firewall or under the car. If any joint has been apart, plan on new gaskets rather than reusing the old ones—once compressed and heat-cycled, they rarely reseal properly. When replacing:

• Use quality, application-correct gaskets (MLS for the manifold, the correct size donut ring, and the right flange profile).
• Clean mating faces so they’re flat and free of old gasket material or rust scale.
• Avoid generic sealants, most exhaust gaskets are designed to be installed dry. Follow the workshop manual if any joint permits a specific high-temp compound.
• Torque fasteners to the service manual spec and in the correct sequence. Spring-bolt donut joints should compress evenly—don’t crank them solid.
• Replace fatigued hardware (studs, nuts, spring bolts). Heat-cycled fasteners can loosen and cause repeat leaks.

There’s no fixed replacement interval—inspect at regular services or any time the exhaust is disturbed. Catching a minor leak early saves the O2 sensor from bad data, keeps the cabin fume-free, and helps the Lancer pass noise and emissions checks without drama.

Popular question: Which exhaust gaskets does a 1998 Lancer actually have?

It typically has three types: the exhaust manifold-to-cylinder head gasket, a crushable donut/ring gasket at the front pipe joint, and flat flange gaskets between sections like the catalytic converter and centre/rear muffler. Exact fit varies slightly by engine and market, but the Mitsubishi EPC lists all three for 1998 CK/CE models.

Popular question: When should exhaust gaskets be replaced on a ’98 Lancer?

Replace whenever a joint is disassembled, or if there’s a leak (ticking, soot marks, fumes, or a sharp exhaust note). During routine servicing, inspect the joints and hardware, if compression rings look flattened or flanges are pitted, new gaskets and hardware are cheap insurance.

Popular question: Can exhaust leaks damage the engine or fail WOF/RWC?

Yes. Leaks ahead of the O2 sensor can skew fuelling and hurt performance. Any obvious leak can also cause a WOF/RWC fail due to noise, fumes, or emissions. Sorting the gasket and hardware usually restores proper sealing and keeps the Lancer compliant.