Parts for your 2019 Haval H6-Radiator cap

2019 Haval H6 radiator-cap: what’s fitted and what owners should know

The 2019 Haval H6 doesn’t use a traditional radiator cap on the radiator itself. Instead, it runs a modern closed cooling system with a remote, pressurised expansion (coolant reservoir) tank. The pressure cap lives on that reservoir under the bonnet, and there’s no filler neck or cap on the radiator. So if someone’s hunting for a “radiator-cap” on a 2019 H6, it’s not relevant to this model—the correct part to consider is the coolant reservoir pressure cap.

Technical sources that document this layout include:

• Haval H6 Owner’s Manual (2019): Cooling system and Maintenance sections identify coolant checks and top-ups at the expansion tank only, with cautionary notes about not opening the reservoir cap when hot.
• Haval/Great Wall H6 Workshop Manual (GW4B15/GW4C20B engines): Cooling system diagrams show a remote, pressurised degas/expansion tank with the pressure cap, the radiator has no filler neck.
• Great Wall Motors H6 Parts Catalogue (2017–2020 series): Lists a pressure cap for the coolant reservoir and no separate radiator neck cap.

Why Haval doesn’t use a radiator cap on the 2019 H6:

1. Higher fill point and better air purging: A remote tank mounted high helps bleed trapped air and stabilises coolant level.
2. Packaging and safety: Removing the cap from the hot radiator reduces scald risk and simplifies radiator tank design.
3. System performance: A sealed, pressurised reservoir improves boiling margin and coolant circulation control.
4. Service consistency: Owners only interact with one clearly labelled cap at the reservoir, which reduces servicing error.

Maintenance tip for owners: treat the coolant reservoir cap as the system’s pressure valve. Check its rubber seal and spring action during routine servicing. If there are signs of coolant pushing past the cap, slow warm-up, recurring coolant loss, or hoses going rock-hard too quickly, have the cap pressure-tested and replace it with an OE-spec unit. Always open only when the engine is cool, and refill with the correct OAT/HOAT coolant type and the right water mix as specified by Haval.

Popular questions about the 2019 Haval H6 radiator-cap

Does the 2019 Haval H6 have a radiator cap?
It doesn’t have a cap on the radiator. The pressure cap is on the coolant expansion (reservoir) tank. That cap manages system pressure and replaces the old-school radiator neck cap found on older vehicles.

Where’s the coolant cap and what pressure rating should it be?
The cap is on the plastic reservoir under the bonnet. The pressure rating is printed on the cap itself (commonly around 1.1–1.4 bar on many late-model SUVs). Owners should match the rating specified for their exact H6 engine variant as noted by Haval.

How often should the coolant reservoir cap be replaced?
There’s no fixed interval, but it should be inspected at every service. Replace it if the seal is cracked, the spring feels weak, there’s evidence of venting, or if overheating/coolant loss diagnostics point to a cap not holding pressure. Use a genuine or equivalent cap meeting Haval’s spec.