Haval Coolant Type: What the Owner’s Manual Actually Specifies

BySerge Barrett

Haval doesn’t use a proprietary branded coolant system the way Volkswagen or Toyota do, but the specification still matters. The wrong coolant type in a modern aluminium engine causes corrosion that is invisible until a leak or overheating event reveals the damage. Here is what the H6, Jolion, and related models require, taken directly from official owner’s manuals.

What Type Haval Requires

All current Haval petrol and hybrid models use ethylene glycol-based coolant. The owner’s manual for the H6 and Jolion specifies two grades depending on climate:

  • Ethylene glycol No. 35 — for standard conditions, protecting to approximately −35°C. This is the correct type for Australia, South Africa, the Middle East, and most Southeast Asian markets.
  • Ethylene glycol No. 45 — for alpine or cold-climate regions, protecting to approximately −45°C.

The coolant must be phosphate-free, silicate-free, and nitrite-free — an OAT (Organic Acid Technology) or HOAT (Hybrid OAT) formulation. The H6 2021 owner’s manual specifically lists the coolant specification as DHTF 2, which is GWM’s internal designation for an OAT-type extended life coolant.

Do not use green IAT (Inorganic Additive Technology) coolant — the type commonly sold as universal or standard antifreeze. IAT coolants contain silicates and phosphates that are incompatible with the aluminium components in Haval engines and will cause deposits and corrosion within 30,000–50,000 km of use.

Capacity by Model

  • Haval H6 (petrol, 2.0T GW4C20) — approximately 6.7–8.0 litres including the heater circuit. The H6 HEV has a separate battery motor cooling circuit of approximately 3.5 litres that requires the same coolant type.
  • Haval Jolion (1.5T petrol) — approximately 6.0–6.5 litres.
  • Haval Jolion HEV / Jolion Pro HEV — petrol cooling circuit approximately 5.5 litres; electric motor cooling circuit approximately 3.5 litres. Both circuits use the same OAT coolant specification.
  • GWM Ute / Cannon (2.0T petrol) — approximately 7.0–7.5 litres.
  • Tank 300 (2.0T petrol) — approximately 8.0 litres including transfer case cooling circuit on 4WD variants.

Mixing and Dilution

Factory fill in most markets is a pre-mixed 50/50 concentrate to distilled water ratio, providing freeze protection to −35°C and boil-over protection to approximately 125°C. In Australian and South African conditions where freezing is not a concern, some owners run a 40/60 concentrate-to-water ratio — this is acceptable but reduces the corrosion inhibitor concentration slightly.

Never top up with tap water. The mineral content in tap water reacts with the OAT inhibitor package and accelerates deposit formation inside coolant passages. Use distilled or deionised water when mixing concentrate, or buy a pre-mixed product.

Do not mix OAT coolant with HOAT or IAT coolant. If the existing coolant colour or type is unclear — or if a previous owner used a generic green coolant — flush the system completely before refilling. Mixing incompatible types causes the inhibitor packages to react and form sludge that blocks the water pump and heater core.

Change Interval

Haval specifies coolant replacement at 4 years or 80,000 km for most petrol models. Independent mechanics working on the Australian and South African market Haval fleet generally follow this interval. The hybrid cooling circuits — which run at lower temperatures than the main engine circuit — are sometimes overlooked at service; both circuits should be changed on the same schedule.

If the coolant in the reservoir appears brown, has visible sediment, or shows an oily film on the surface, change it immediately regardless of the service interval. Brown coolant indicates either inhibitor depletion, contamination from a head gasket seepage, or an incompatible coolant having been introduced at some point in the vehicle’s history.

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