What Causes the Abnormal Noise When Starting the Haval H6?
4 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.
Start-up noises are quite common when I work on my own car. You need to identify exactly which part is making the noise. Most likely, it's the alternator belt being too loose or cracked—if left unchanged for too long, it can slip and produce a high-pitched squeal. Starter motor failure is another possibility; damaged starter gears or debris can cause a clattering sound. Loose battery connections can also cause issues with the starting system. Don't panic—start with a DIY check: use a multimeter to test if the battery voltage is normal, and listen to see if the noise is coming from the belt pulley area. If you have the tools, try tightening the belt screws or applying some belt lubricant. I've dealt with belt cracks causing noise before—simple replacement fixed it. If that doesn't work, check if the water pump or tensioner pulley is worn, and add some engine oil if lubrication is insufficient. Regularly cleaning dust from the engine bay can reduce noise sources—it's both convenient and safe.
The abnormal noise when starting the Haval H6 usually points to issues with the belt, starter, or battery. The most common cause is a squealing noise from a loose or aged alternator belt, while a faulty starter with damaged gears produces a clunking sound. Loose battery connections can lead to difficult starts accompanied by miscellaneous noises. Such abnormal noises are not minor issues and may develop into major faults affecting driving safety. I recommend prompt troubleshooting to avoid more severe damage: first visually inspect the belt for cracks, then listen to the noise location. If the noise is severe during cold starts, immediate action is even more necessary. Regular maintenance of the fan and engine lubrication components can effectively prevent such issues. If the abnormal noise persists, visit a professional shop to use a diagnostic tool to check the engine system and confirm the issue before replacing parts. Don't delay; early repairs save both hassle and money.
