What is the reason for the rattling sound in the Haval H6 engine compartment?
4 Answers
The reason for the rattling sound in the Haval H6 engine compartment is: The vehicle has been parked for too long, causing most of the engine oil to flow back into the oil pan. During the cold start process, a protective oil film is not formed in time, resulting in metal impact sounds in the engine. The noise will disappear after the vehicle warms up. Taking the 2021 third-generation 2.0T automatic two-wheel-drive Max version of the Haval H6 as an example: It is a compact SUV launched by Great Wall Motors, with a length, width, and height of 4653mm, 1886mm, and 1730mm respectively, and a wheelbase of 2738mm. It is equipped with a 2.0T turbocharged engine, with a maximum power of 155kw and a maximum torque of 325nm, matched with a 7-speed dual-clutch transmission.
I've been driving my Haval H6 for several years, and recently there's been a constant ticking sound from the engine compartment. At first, I thought it was fan noise, but it kept getting louder. After checking online, it seems this sound mostly comes from the valve lifters. The valve lifters in Haval vehicles are prone to wear. If the engine oil is insufficient or of poor quality, inadequate lubrication can cause the lifters to tick. Another possibility is an issue with the fuel injectors. Fuel injectors normally make a ticking sound during operation, but if it becomes louder, it indicates internal component wear or electrical faults. There's also the issue with the belt. If the timing belt is too loose or has cracks, it can produce a rattling sound, especially during cold starts. I later took it to a repair shop, and they fixed it by replacing the lifters. Regular maintenance, such as frequently checking the oil and belts, and changing the oil every 5,000 kilometers, can prevent such issues, saving money and giving peace of mind.
As a car repair enthusiast, I find that the ticking sound in the Haval H6 engine is quite common. There are several possible causes: the valve lifter is the main suspect, as hydraulic lifters can produce noise when lacking oil or being worn; fuel injector noise is another possibility, as the high-pressure fuel injection process is normal but can become louder with aging; loose belt components, including the timing belt or alternator belt, can cause friction and abnormal sounds; it could also be an issue with the carbon canister solenoid valve, which makes a ticking sound during the operation of the fuel evaporation system and produces strange noises when faulty. To diagnose, listen to the specific location: ticking at the top of the engine upon startup is likely the lifters, while at the bottom, it's probably the belt. For self-inspection, use a phone recording for comparison. It's recommended to regularly visit the 4S shop for maintenance. Haval's engine design is decent among domestic cars, but regular belt replacement is essential to prevent bigger issues.
The ticking sound in the Haval H6 often indicates engine issues. Possible causes include worn valve lifters leading to increased operational noise, clogged or faulty fuel injectors making louder injection sounds, or problems in the belt system such as damaged pulley bearings. I recommend not ignoring it; stop immediately to check the oil level to ensure proper lubrication. Ignoring it could turn a minor issue into a major engine overhaul. Regular maintenance is crucial, including oil changes and belt inspections. Safety comes first when driving—take your vehicle to a professional shop for diagnosis upon hearing unusual noises.
