Parts for your 2022 Mitsubishi Asx-Head gasket

2022 Mitsubishi ASX head gasket — purpose, care, and when to replace

Yes, the 2022 Mitsubishi ASX uses a head gasket. Technical references including the Mitsubishi Motors 4B1 engine workshop manual (covering 4B11/4B12 engines — cylinder head and gasket removal/installation and torque sequence) and the Mitsubishi ASA electronic parts catalogue for ASX/RVR/Outlander Sport list a multi‑layer steel (MLS) cylinder head gasket for these models. That confirms the part is fitted and serviceable on 2.0L 4B11 and, where applicable, 2.4L 4B12 variants sold in 2022.

The head gasket sits between the cylinder head and engine block, sealing three critical systems: high‑pressure combustion chambers, coolant passages, and oil galleries. On the ASX’s alloy DOHC engine, the MLS gasket handles heat cycles and clamping loads to keep compression tight and stop oil or coolant sneaking where it shouldn’t. When it’s healthy, the engine runs clean, cool, and efficient.

There’s no scheduled replacement for a head gasket — it’s a repair-on-condition item. Keeping the cooling system in top nick is the best preventative care. Stick to the specified long‑life coolant, keep an eye on coolant level and the temp gauge, and don’t ignore leaks or an overheating event. Clean oil and the correct spec also help by preventing sludge and hot spots around the fire rings.

If a gasket does fail, the ASX may show:

• Unexplained coolant loss, overheating, or pressurised hoses after a cold start
• White exhaust steam once warm, sweet smell, or rough cold start
• Milky residue under the oil cap or bubbles in the coolant reservoir
• Misfire and low compression across adjacent cylinders

Replacement on this vehicle is a proper workshop job. A quality repair typically includes:

• Diagnosis with chemical block test and/or cylinder leak‑down
• Head removal, crack check, and machining if out of flat
• New MLS head gasket and new torque‑to‑yield head bolts tightened to the Mitsubishi sequence and angle
• Timing components correctly aligned, fresh coolant, and an engine oil and filter change
• Thermostat and radiator cap assessment, water pump and hoses inspected

Budget varies by region and engine condition, but most local workshops will quote based on machining needs and parts selection. For peace of mind, look for genuine or OEM‑quality gaskets, documented torque procedures, and a cooling‑system pressure test before hand‑over.

Popular questions

What are the common signs of a blown head gasket on a 2022 Mitsubishi ASX?
Typical signs include overheating, unexplained coolant loss, white steam from the exhaust after warm‑up, milky oil, or persistent bubbles in the expansion tank. It can also misfire on start‑up or show low compression on adjacent cylinders. A mechanic can confirm with a cooling‑system pressure test and a combustion‑gas (block) test.

Does the 2022 ASX definitely have a head gasket?
Yes. The 2022 ASX with the 2.0L 4B11 (and markets with the 2.4L 4B12) uses a multi‑layer steel head gasket between the alloy head and block. This is documented in Mitsubishi’s 4B1 engine service manual and the Mitsubishi ASA parts catalogue for the ASX/RVR platform.

How much does a head‑gasket job cost in Australia or New Zealand?
Costs vary with machining needs and what’s replaced at the same time. Many workshops quote a range to cover head testing/skimming, gasket set, new head bolts, fluids, and labour. It’s smart to ask for a written estimate that includes machining, coolant, oil, thermostat assessment, and any timing‑component labour overlap.