Parts for your 2013 Mitsubishi Outlander-Head gasket

2013 Mitsubishi Outlander head gasket — what it does and when to replace it

Yes, a head gasket is fitted to the 2013 Mitsubishi Outlander. Technical sources that spell this out include the Mitsubishi Motors Service Manual for the 2013 Outlander (engine mechanical sections detailing cylinder head removal/installation and torque sequence), the Mitsubishi ASA electronic parts catalogue (listing “gasket, cylinder head” for 4B11/4B12 petrol, 4N14 diesel, and the 2.0 Atkinson-cycle engine used in early PHEV variants), and mainstream workshop literature such as Haynes repair manuals covering 2007–2013 Outlander models. Those documents confirm the part’s presence, specification and service procedures.

On this model, the head gasket sits between the cylinder head and engine block. Its job is to keep combustion pressure in, while keeping engine oil and coolant in their own passages without cross-contamination. Modern Outlanders typically use a multi-layer steel (MLS) gasket, designed to cope with thermal cycling and high cylinder pressures.

It’s not a scheduled maintenance item, it gets replaced if the head’s removed or if the gasket fails. Owners should keep an eye out for tell-tale symptoms under the bonnet:

• Overheating or unexplained coolant loss
• White steam from the exhaust, sweet coolant smell, or a misfire on cold start
• Milky residue under the oil cap, or pressurised coolant hoses shortly after start-up

If those signs crop up, a workshop can run a cooling-system pressure test and a chemical block test for combustion gases in the coolant. If replacement is needed, it’s a fairly involved job. The technician will follow the factory torque-and-angle sequence, replace the single‑use head bolts, check head/block flatness, and clean sealing surfaces meticulously. It’s smart to renew the thermostat, radiator cap, and coolant at the same time, and to inspect the water pump and hoses. Using an OEM or high-quality MLS gasket matched to the exact engine code (4B11, 4B12, 4N14, or PHEV’s 2.0) matters.

Good cooling-system maintenance greatly extends head-gasket life. Stick to the correct long‑life coolant type and mix, keep the radiator and fans in top nick, and don’t drive on if the temperature gauge spikes. For petrol models, healthy ignition and fuelling (to avoid detonation) helps protect the gasket and the head.

FAQs

Does the 2013 Outlander PHEV have a head gasket too?
Yes. The PHEV still uses a conventional 2.0‑litre petrol engine alongside its electric drive, and that engine has a standard cylinder head and head gasket. Servicing and failure signs are broadly the same as the non‑hybrid petrol models, though access and procedures can vary, so following the PHEV‑specific workshop manual is important.

How much does a head-gasket replacement cost in Australia or New Zealand?
A typical workshop bill lands around AUD/NZD 2,000–4,000, depending on engine variant, labour time, machining of the head, and the quality of parts used. Diesel and some PHEV jobs can be toward the upper end. Extras like thermostat, coolant, and ancillary seals are wise while it’s apart and add modestly to the total.

Will a leak-stop additive fix a head-gasket issue on an Outlander?
Additives may offer a short-lived patch in very minor seepages, but they don’t repair a failed gasket and can clog heater cores and small coolant passages. If tests point to combustion gases in the coolant or cross‑contamination, a proper gasket replacement is the reliable fix.