Parts for your 2018 Haval H6-Oil seals

2018 Haval H6 Oil Seals: What They Do and When to Replace Them

Oil seals are absolutely used on the 2018 Haval H6. Technical references including the GWM/Haval H6 Workshop/Service Manual for 2017–2019 (Engine and Driveline sections), the GWM Electronic Parts Catalogue, and independent repair data (e.g., Autodata) identify multiple oil seals on this model: front and rear crankshaft seals, camshaft seals, balance shaft/timing cover seals, gearbox/input and output shaft seals, and drive shaft (CV) oil seals.

On the H6, oil seals keep engine and transmission lubricants where they belong and stop dust, water, and road grit getting in. They’re fitted anywhere a rotating shaft exits a housing—think crankshaft snouts and rears, camshafts, and the transmission and differential outputs. By controlling oil, they help maintain correct lubrication, protect bearings, and keep the underbody, accessory belts, and mounts from being soaked in oil.

Oil seals aren’t a routine “replace-by-the-kilometre” service item, they’re replaced when they show wear or leakage. As part of regular servicing on a 2018 Haval H6, a visual check under the bonnet and from beneath is smart. Common check points include:

• Front of engine around the crank pulley and timing cover
• Bellhousing join (rear main seal area)
• Transmission output flanges and driveshafts
• Undertray and crossmembers for fresh oil mist

Early signs of trouble are wetness or weeping at the seal lip, oil drips after parking, a hot-oil odour, or oil on the accessory belt. If ignored, leaks can accelerate rubber deterioration, contaminate the alternator or clutch (where fitted), and lower fluid levels.

When replacement is needed, the best results come from OEM-quality seals, correct installation depth and orientation, a light film of clean oil on the lip, and inspection of the shaft surface for grooves. For crank and cam seals, it also pays to check crankcase ventilation (PCV/breather hoses), excessive crankcase pressure can push new seals out in short order. On the H6, a front crank seal is usually a moderate job involving the crank pulley and front covers. A rear main seal is a bigger undertaking, as the transmission typically needs to come out.

Good habits help seals last: stick to the specified oil grade and fill level, change oil on time, and keep breathers clear. In Aussie and Kiwi conditions—with heat, dust, and long highway kilometres—those simple steps go a long way to keeping the H6 tight and tidy.

Popular questions about 2018 Haval H6 oil seals

Where do oil leaks most commonly show up on a 2018 Haval H6?
Typical hotspots are the front crank area (around the crank pulley and timing cover), the bellhousing joint if the rear main seal is weeping, and the transmission output flanges where the driveshafts exit. Oil mist on the undertray or crossmember is a handy clue. A workshop will clean and re-check after a few kilometres to pinpoint the source.

How often should oil seals be checked on a 2018 H6?
A quick inspection every service—roughly every 10,000–15,000 kilometres or 6–12 months—is sensible. That includes looking for fresh oil around seal areas and confirming there’s no overfill. In higher-heat, dusty Aussie/NZ use, it’s worth being a bit more vigilant, especially before long trips.

Is it safe to drive with a minor oil seal leak?
Short-term, small weeps are usually manageable if fluid levels are kept spot-on. But delaying repairs risks oil reaching the accessory belt, softening mounts, or dropping fluid levels too low. If a leak worsens or there’s oil near the bellhousing or exhaust, it’s best to organise repairs promptly.