Parts for your 2018 Haval H6-Head gasket

2018 Haval H6 head gasket — what it does and when to sort it

Yes, the 2018 Haval H6 does use a head gasket. Technical sources such as the Great Wall Motors H6 Workshop Manual (2017–2018) and the GW4G15B/GW4C20-series engine service specifications list an aluminium cylinder head bolted to an alloy block, sealed by a multi-layer steel (MLS) head gasket. Trade databases like Autodata/HaynesPro also specify a replaceable head gasket and torque-to-yield head bolts for these turbocharged petrol engines, confirming the part is absolutely relevant on this model.

On the H6’s 1.5T and 2.0T four-cylinder engines, the head gasket sits between the block and the head, keeping combustion pressure where it belongs while separating oil and coolant galleries. With turbo boost in the mix, sealing demands are higher, which is why the factory goes with an MLS gasket and single-use head bolts. When everything’s right, owners get stable temps, clean oil, steady idle and full power under the right foot.

A head gasket isn’t a routine service item, it’s replaced if it fails or whenever the head is removed. The smartest “maintenance” is prevention. Keep the cooling system spot-on: correct OAT/HOAT coolant type and mix as per the H6 manual, fresh coolant at the recommended interval, a healthy radiator cap, and a thermostat and fans that do their job. Regular oil changes with the specified grade help reduce hot spots that can stress the gasket. Under the bonnet, don’t ignore a slow coolant loss, a whiff of exhaust in the expansion tank, or a temp gauge that creeps on long climbs.

• Common signs owners notice: unexplained coolant loss, milky residue under the oil cap, white steam from the exhaust after warm-up, rough cold starts, overheating, or pressurised hoses when cold.
• If replacement is needed: use an OEM-quality MLS gasket of the correct thickness, check and machine the head only within spec, replace torque-to-yield head bolts, follow the factory torque sequence and angles, renew intake/exhaust/rocker cover gaskets, flush the cooling system, and change oil and filter after the job. A proper bleed and a post-repair CO₂/combustion leak test under load are good practice.

Done right, the H6 will rack up plenty more kilometres without drama.

Popular questions about 2018 Haval H6 head gaskets

What are the classic symptoms of a blown head gasket on a 2018 Haval H6?
Owners usually report coolant loss with no obvious leak, overheating on hills or in traffic, white steam from the exhaust once warm, a sweet smell from the tailpipe, or a misfire on cold start. Under the cap, oil may look milky, and the expansion tank can feel over-pressurised. A cooling-system chemical test for combustion gases is a quick way to confirm.

Is it safe to keep driving if the head gasket is failing?
It’s risky. Driving on can warp the alloy head, contaminate bearings with coolant, and turn a repair into a full engine rebuild. If temps spike or the heater blows cold with the gauge high, park it, let it cool, and arrange a tow to a workshop.

How much does a head gasket job cost on an H6 in Australia or New Zealand?
Ballpark figures vary with labour rates and machining needs, but many shops quote roughly 10–14 hours. Expect about AUD 1,800–3,500 in Australia or NZD 2,000–4,000 in New Zealand for parts, machining, fluids and labour. A firm estimate needs an inspection and pressure tests.