What Causes the Abnormal Noise When Starting the Haval H6?
2 Answers
It is mainly due to cold start. When the car has been parked for a day, the engine lubricant has almost entirely flowed back into the oil pan. During a cold start, the oil pump cannot immediately establish oil pressure or form an oil film between components, especially for the valves inside the cylinder head, which do not receive lubrication during a cold start. The relevant introduction of the Haval H6 is as follows: 1. Introduction One: The Haval H6 is a compact SUV equipped with two engines—a 1.5-liter turbocharged engine and a 2.0-liter turbocharged engine. The 1.5-liter turbocharged engine delivers 169 horsepower and a maximum torque of 285 Nm. This engine can output maximum power at 5000 to 5600 rpm and maximum torque at 1400 to 3000 rpm. It features CVVL technology, direct fuel injection, and an aluminum alloy cylinder head and block. It is paired with a 7-speed dual-clutch transmission. 2. Introduction Two: The 2.0-liter turbocharged engine produces 224 horsepower and a maximum torque of 385 Nm. This engine can output maximum power at 5500 rpm and maximum torque at 1600 to 3600 rpm. It is equipped with DVVT technology, direct fuel injection, an aluminum alloy cylinder head, and a cast iron block. It is matched with a 7-speed dual-clutch transmission. 3. Introduction Three: The Haval H6 uses a MacPherson independent suspension at the front and a double-wishbone independent suspension at the rear. The double-wishbone suspension is an improvement over the double-wishbone independent suspension, which can reduce the body's roll amplitude, thereby enhancing the car's handling performance.
I also experienced abnormal noises when starting my Haval H6, which are mostly caused by components in the engine compartment. The most common issue is an aging alternator belt—when the belt becomes loose or worn, it produces a squeaking sound, especially noticeable during cold starts. Another possibility is a faulty starter, such as stuck or cracked starter gears, which can cause a rattling noise. If the battery voltage is unstable, it can also make the entire system operate less smoothly. More subtle issues include abnormal water pumps or tensioners, or insufficient lubrication leading to metal friction sounds. These problems are not trivial; long-term neglect may cause engine damage or even breakdowns. I recommend checking the belt condition promptly—lightly press it to see if there are cracks, or pay attention to the direction of the noise during startup. If unsure, take it to a repair shop for diagnosis—replacing the belt or tightening screws usually solves the issue. Regular maintenance of the fan and cooling system can help prevent such troubles.
