Parts for your 2018 Mitsubishi Outlander-Head gasket

2018 Mitsubishi Outlander head gasket — purpose, care and when to replace

Yes, the 2018 Mitsubishi Outlander uses a cylinder head gasket across its petrol 2.0L (4B11), petrol 2.4L (4B12), 2.2L diesel (4N14) and the PHEV’s petrol engine. This is documented in the Mitsubishi Motors Workshop Manual for Outlander ZK/ZL (Engine: Cylinder Head sections) and confirmed in the Mitsubishi ASA electronic parts catalogue, which lists head-gasket part entries for these engines. These factory sources recognise the head gasket as a standard sealing component between the block and the cylinder head.

In this Outlander, the head gasket’s job is to seal combustion pressures while keeping engine oil and coolant in their own passages. It’s a thin, multi-layer steel (MLS) gasket engineered to handle heat cycles, pressure spikes and the different expansion rates of alloy heads and iron/aluminium blocks. When it’s healthy, the engine runs smoothly, holds compression and keeps its fluids where they belong. When it’s not, drivers may see overheating, misfires, white exhaust steam, a sweet smell from the exhaust, bubbling in the expansion tank, unexplained coolant loss, or milky residue under the oil cap.

The head gasket isn’t a scheduled replacement item