What Causes the Loud Engine Noise in Haval Big Dog?
2 Answers
Haval Big Dog engine noise causes are as follows: Exhaust pipe rupture: If the car engine noise comes from the exhaust pipe, it is most likely caused by a ruptured exhaust pipe, which can be resolved by replacement. Spark plug aging: If sharp noises occur during high-speed engine operation, it may be due to aged spark plugs or blockage by dirt, and replacement is needed. Fuel depletion: If the engine sound is very low, it may indicate fuel depletion, which can be resolved by timely refueling. Bearing damage: If the engine noise changes with the maximum power RPM, it may be caused by damaged engine bearings, and replacement is required.
I drove a Haval Big Dog for many years, and loud engine noise is often caused by low oil levels, which increases friction between mechanical parts and generates noise. A clogged air filter filled with dust restricts airflow, forcing the engine to work harder and produce constant noise. Loose or worn belts can also create a rattling sound, like a small hammer tapping, and in severe cases, it can even affect power output. I recommend first checking the oil dipstick and cleaning the air filter yourself. If left untreated, fuel consumption will skyrocket, and engine wear will accelerate, cutting its lifespan in half. It's best to get it checked at a shop early to avoid costly repairs later—routine maintenance can save a lot of trouble.
