Parts for your 2017 Haval H6-Fuel pump

2017 Haval H6 fuel pump — purpose, care, and when to change it

Yes, the 2017 Haval H6 absolutely uses a fuel pump. Technical references including the Great Wall Motors/Haval H6 Workshop Manual (2015–2017), the GW4C20 (2.0T petrol) and GW4D20 (2.0 diesel) engine manuals, and the Haval Electronic Parts Catalogue for 2017 VINs all specify an in-tank electric fuel pump module. The petrol direct-injection models also run an engine-driven high-pressure fuel pump (HPFP), and the diesel uses a common-rail high-pressure pump. Major aftermarket catalogues list these pumps for the 2017 H6 as well.

On the road, the H6’s in-tank pump lifts fuel from the tank and maintains steady low pressure to the engine. On the GW4C20 petrol, a cam-driven HPFP then boosts pressure for the direct-injection rail. On the diesel, the common-rail high-pressure pump does similar duty at much higher pressures. Together, they make sure the engine gets the right amount of fuel at the right pressure for smooth starts, crisp throttle response, and proper power and economy.

Fuel pumps aren’t a routine replacement item, but a bit of care goes a long way. Use good-quality fuel, avoid running the tank near empty (it helps keep the pump cool and lubricated), and replace the fuel filter at the recommended interval. If the car feels flat under load, hesitates, struggles to start, or you hear a whine from the tank, it’s worth getting a proper fuel pressure test and scanning for fault codes before parts swapping.

• Common warning signs:
  • Hard starting, long crank, or stalling in traffic
  • Loss of power on hills or when overtaking
  • Rough idle, misfire under load, or lean-fuel fault codes
  • Audible whining from the tank area

• Replacement and servicing tips for the H6:
  • Depressurise the fuel system and disconnect the battery before work.
  • For the in-tank module, fit a new seal/O-ring and torque the lock ring correctly to prevent vapour leaks.
  • Prime the system after install (ignition-on cycles or scan-tool fuel pump prime) and check for leaks.
  • On GW4C20 petrol HPFP jobs, follow the torque sequence, inspect the cam follower, and verify rail pressure with a scan tool.
  • On diesels, keep filtration spotless and bleed/prime thoroughly to protect the high-pressure system.

Quality parts and methodical testing save headaches. A trusted technician with the right fuel-pressure gear and service info will keep a 2017 H6 happy for many kilometres.

Popular questions

Does the 2017 Haval H6 have one or two fuel pumps?
Most 2017 H6 petrols (GW4C20) effectively have two: an electric in-tank pump and an engine-mounted high-pressure pump for the direct injection. Diesel variants also use an in-tank lift/priming stage and a high-pressure common-rail pump. Both stages are critical to stable fuel delivery.

What are the signs the H6 fuel pump is failing?
Think hard starts, hesitation on acceleration, low power up hills, stalling, or a high-pitched whine from the tank. A diagnostic with a fuel pressure gauge and scan tool is the best way to confirm, as similar symptoms can come from clogged filters or dodgy sensors.

How often should the fuel pump be replaced?
There’s no fixed interval. Pumps are replaced on condition. Preventative care—clean fuel, timely filter changes, and keeping more than a quarter tank—helps them last. If pressure or volume tests don’t meet spec, or noise and faults persist, it’s time to replace.