What causes the valve noise in Haval H6?
3 Answers
Haval H6 valve noise causes: 1. The gap between the hydraulic valve lifter and the cam (or valve seat), which is mostly caused by excessive wear of the hydraulic lifter, resulting in rapid oil pressure release inside the lifter and causing noise. The hydraulic lifter needs to be replaced; 2. Noise caused by too high or too low oil level in the crankcase. The engine oil level needs to be checked. Noise caused by dirty lifters requires cleaning the hydraulic lifters; 3. Noise caused by wear of the valve guide. The valve guide needs to be reamed and valves with thicker valve stems installed. Noise caused by too thin engine oil requires replacing the oil with the appropriate viscosity. The Haval H6 is the flagship model of the Haval brand. In terms of body dimensions, its length, width, and height are 4640mm, 1825mm, and 1690mm respectively.
When I used to drive my Haval H6, I encountered a ticking sound from the valves, which was really frustrating. The most common cause is improperly adjusted valve clearance—if the gap is too large or too small, it can create knocking noises during engine operation. Another possible reason could be oil-related issues, such as using low-quality oil or insufficient lubrication, leading to increased friction in the valve components. Additionally, long-term driving can cause valve spring aging or hydraulic lifter wear, which may also trigger abnormal noises. I recommend starting with simple checks, like verifying the oil level or noting whether the noise is more noticeable when the engine is cold or hot. If left unaddressed, the problem could worsen into more severe engine issues, even affecting fuel consumption and power. It's best to visit a 4S shop promptly for a professional diagnosis—replacing the oil or adjusting the clearance usually solves the problem. Don’t push your luck.
When driving the Haval H6, the valves keep making noise, and I suspect it might be related to routine maintenance. For example, if the engine oil isn't changed on time, or if the oil passages are clogged, the valves won't be properly lubricated, leading to dry friction and a clicking sound. Or, if the car has been driven for many years, components like the valve lifters or camshaft surfaces may wear out and develop pits, causing noise when they move. I've also heard that using low-grade gasoline can lead to excessive carbon buildup, clogging the valves and increasing noise. This kind of abnormal noise isn't just annoying—it can also accelerate engine wear. It's best to check the engine oil early, clean the carbon deposits, or have a mechanic adjust the valve clearance. Remember to stick to regular maintenance schedules to prevent minor issues from turning into major problems.
