The reasons are as follows:
There is not enough lubrication when starting the cold car, and the hydraulic lifter and mechanical rocker arm do not work not correctly, resulting in the clicking sound. Engine oil condition is poor: If the viscosity of the engine oil is too high or too low, the engine will make noise. The belt is not tight enough: the motor makes a squealing noise during operation. Leaking in the intake and exhaust pipes: At the intake and exhaust pipes, gas will escape from the exhaust pipes, making noise. Poor fuel quality: causing strong vibrations and noise in the engine. Loose plastic parts in the engine compartment: Collisions between the engine working room and the engine compartment will produce noise.
The generator belt tensioner is defective. The loud noise after Ford replaced the neckalternator belt was the fault of the alternator belt tensioner. You just need to go to the 4S store for inspection. Generator refers to a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other electrical machine. It converts energy generated by water flow, air flow, fuel combustion or atomic energy. nuclear fission into mechanical energy and transmits it to the generator. It is then converted into electrical energy by the generator.