Parts for your 2020 Mitsubishi Eclipse cross-Exhaust gasket

2020 Mitsubishi Eclipse Cross exhaust gasket — purpose, fitment, and care

Yes, the 2020 Mitsubishi Eclipse Cross uses exhaust gaskets. This is confirmed in the Mitsubishi Eclipse Cross (GK) Workshop Manual (2018–2020) — Group 15: Exhaust Pipe and Muffler, and Group 11A: Engine Overhaul for the 1.5L turbocharged 4B40 — which detail gaskets at the cylinder head–to–exhaust manifold, turbocharger outlet–to–front pipe, and various flange joints downstream. The Mitsubishi ASA electronic parts catalogue (GK1W, MY2020) also lists exhaust manifold and front pipe gaskets, reaffirming fitment on this model.

On the Eclipse Cross, exhaust gaskets have one simple job: keep hot gases sealed inside the exhaust so the turbo spools properly, oxygen sensors read accurately, and the cabin stays quiet and fume‑free. Up at the engine, a multi‑layer steel manifold gasket copes with extreme heat and expansion. At the turbo outlet/front pipe there’s typically a crush (donut) gasket that conforms under clamp load. Further back, flat flange gaskets seal joins near the catalytic converter, centre pipe, and rear muffler.

There’s no fixed service interval for exhaust gaskets, but they should be replaced whenever an adjoining component is removed, and any time a leak is suspected. Common signs include a ticking or chuffing noise on cold start, a whiff of exhaust in or around the cabin, visible black soot at a joint, a sharper exhaust note, or the check engine light due to skewed O2 sensor readings. On the 1.5T, a small leak before the turbo can hurt spool and economy, so it’s worth sorting quickly.

Good workshop practice for the Eclipse Cross includes:

• Always fit quality OEM-spec gaskets, crush/donut styles are single-use.
• Inspect flanges and mating faces for warping, pitting, or cracks before reassembly.
• Clean surfaces, don’t use RTV where sensors or catalytic components could be contaminated.
• Use new hardware where specified, and tighten to the Workshop Manual torque specs in an even, criss-cross pattern.
• After a heat cycle, recheck for any audible leaks or fresh soot at joints.

During routine servicing, a quick visual check under the vehicle goes a long way: look for soot trails at joints, feel (carefully, when cold) for loose flanges or broken hangers, and listen for a ticking note that fades as the engine warms. If a joint has been disturbed — say to replace an O2 sensor, downpipe, or muffler section — plan on fitting a new gasket. Following the Mitsubishi Workshop Manual procedures for the GK Eclipse Cross ensures the gaskets seal first go and stay sealed across thousands of kilometres.

Where are the exhaust gaskets on a 2020 Eclipse Cross?

They’re typically found at the cylinder head–to–exhaust manifold interface, at the turbocharger outlet to the front pipe, and at several flange joins further down the system (front pipe to catalyst/centre pipe, and centre to rear muffler). The exact count depends on build and market, but the Workshop Manual and ASA parts listings show multiple gasketed joints on this model.

Do the exhaust gaskets need replacing if the system is taken apart?

Yes — any time a gasketed joint is undone, plan to replace the gasket. The crush/donut types are strictly single-use, and even flat or multi‑layer steel gaskets should be renewed to ensure a reliable seal. It’s also smart to refresh studs/nuts or flange bolts if they’re corroded.

Can sealant be used instead of an exhaust gasket?

No. The Eclipse Cross exhaust uses engineered metal gaskets designed for high heat and pressure. Generic sealants can contaminate oxygen sensors and catalysts, and won’t hold under turbocharged exhaust temperatures. Stick with the correct gasket type and follow the Mitsubishi torque and tightening sequence.