What are the reasons for the ticking sound in the Haval H6 engine compartment?
2 Answers
Haval h6 engine compartment ticking sound reasons are: 1. The vehicle has been parked for too long, causing most of the engine oil to flow back to the oil pan, failing to form a protective oil film in time during cold start and resulting in metal impact sounds in the engine; 2. The fit clearance between the piston and cylinder wall is too large; 3. The oil pressure is too low, and the cylinder wall lubrication is poor. Take the 2021 Haval H6 third-generation 2.0T automatic two-wheel drive Max 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, a wheelbase of 2738mm, equipped with a 2.0T turbocharged engine, a maximum power of 155kw, a maximum torque of 325nm, matched with a 7-speed dual-clutch transmission.
My Haval H6 had the same issue before, where a ticking sound could be heard as soon as the hood was opened, especially noticeable during cold starts. Later, I found out it was mainly caused by insufficient oil or wear in the hydraulic valve lifters, which are responsible for adjusting valve clearance. When they age, unstable oil pressure leads to knocking sounds. Additionally, I checked the timing chain—a failing tensioner can cause the chain to loosen and slap against the guides, producing a metallic clanking noise. The electromagnetic valve action of the fuel injectors during operation can also create a rhythmic ticking sound, but this is normal. The most critical factor not to overlook is the engine oil. Incorrect viscosity or insufficient quantity can lead to poor internal lubrication, causing dry friction and unusual noises. I recommend first identifying the sound source: if it's near the top of the cylinder head, it's likely a valve issue; if it's around the timing chain area, focus on the tensioner. Also, ensure you use 5W-30 full synthetic oil. If the sound worsens after the engine warms up, visit a 4S shop immediately for a stethoscope diagnosis.
