Parts for your 2019 Mitsubishi Asx-Manifold gasket

2019 Mitsubishi ASX manifold gasket — what it does and when to replace it

Yes, a manifold gasket is absolutely used on the 2019 Mitsubishi ASX. Mitsubishi technical literature for the ASX/RVR/Outlander Sport platform (covering the 4B11/4B12 and 4A9-series petrol engines) lists both intake and exhaust manifold gaskets, along with torque sequences for the manifold fasteners. This is documented in Mitsubishi Motors service manuals (engine sections covering Intake and Exhaust) and confirmed in the Mitsubishi ASA electronic parts catalogue and professional repair databases used in workshops.

On this model, the intake manifold gasket seals the junction between the intake manifold and the cylinder head so only metered air enters the engine. The exhaust manifold gasket seals the hot side, keeping exhaust gases in the manifold and through the catalytic converter. If either side leaks, the ASX can run rough, throw fault codes from skewed oxygen sensor readings, make a ticking or hissing noise, or smell of exhaust under the bonnet.

Unlike oil and filters, manifold gaskets aren’t a scheduled replacement item. They’re replaced when a leak shows up, or whenever a manifold is removed for other work. As part of routine servicing on a 2019 ASX, a good technician will visually check around the manifold flanges and listen for cold-start ticks or hisses, especially on higher-kilometre cars or vehicles that see lots of heat cycles (short trips, towing, or hot climates).

Handy pointers for owners and workshops:

• Always use new gaskets when refitting an intake or exhaust manifold, don’t reuse flattened or heat-cycled gaskets.
• Clean and inspect mating surfaces for flatness, don’t smear RTV on MLS or composite manifold gaskets unless the service manual specifically calls for it.
• Follow the Mitsubishi tightening sequence and torque values, replace corroded studs/nuts and use the specified high-temp hardware on the exhaust side.
• Watch for symptoms: hissing or whistling at idle, rough idle, higher fuel use, an exhaust tick on cold start, soot marks at the flange, or an engine light for lean trims.

There’s no fixed kilometre interval, but it’s smart to check for leaks at major services (for example, 60,000–100,000 km) or any time the manifold is off for other jobs. If a leak is found, sort it sooner rather than later to avoid warping, sensor issues, or scorching nearby components.

Popular questions about 2019 Mitsubishi ASX manifold gaskets

Does the 2019 ASX have both intake and exhaust manifold gaskets?
Yes. The 2019 ASX uses gaskets on both the intake and exhaust manifolds. Mitsubishi’s service information specifies these seals and the correct bolt tightening order for a proper fit. Both are considered serviceable items when a manifold is removed or if a leak is detected.

How often should the manifold gaskets be replaced?
There’s no routine interval. Replace them when a leak is present or whenever a manifold is removed. During regular services, a quick inspection for noise, soot trails, or fuel-trim faults is enough. Many ASX vehicles go years without needing manifold gasket work unless disturbed.

Is it safe to drive with a leaking manifold gasket?
It’s best to limit driving. A small intake leak can cause lean running and poor idle, while an exhaust leak can be noisy, hot, and potentially allow fumes into the engine bay. Short trips to a workshop are usually fine, but get it repaired promptly to prevent further damage.