This is the noise made by the friction between the belt and the pulley. If you pour water on it, the sound will be temporary. The motor will sound again after a while of operation. If the belt is a little loose, there will be a loud noise when the motor accelerates or the electrical load is high. Unless the belt is too loose or is aged and hardened, the friction noise will continue as described. , the belt is aged and hardened. The reason is that it needs to be replaced.
Check if it is the noise coming from the cylinder block. Otherwise, it can be determined that it is related to the car's starting system. When inspecting, check whether the belt is broken or has burrs; pay attention to whether the position of the starter is deviated, or whether the belt connecting the starter is aged or bent; check the engine at idle; Perform timely inspections and repairs, and even minor car problems should not be ignored.
Detailed information:
The timing belt is a rubber component. As the engine running time increases, the timing belt and its accessories, such as timing belt tensioner, timing belt tensioner and water pump, etc. or age. Therefore, the manufacturer of any engine equipped with a timing belt will have strict requirements for replacing the beltdistribution and accessories regularly within the specified time. The replacement period will vary depending on the engine structure. Typically, the vehicle will run for 6 hours. month. It must be replaced every 10,000 to 100,000 kilometers. The specific replacement cycle should be based on the vehicle service manual.
Baidu Encyclopedia - Timing Belt
The existence of the most common abnormal noises in engines depends on the state of the engine speed. engine.
Abnormal noise only exists at idle or low speeds. The reasons for the noise include: too much clearance between the piston and the cylinder wall; too tight mounting of the piston pin or too tight mounting of the connecting rod bearing too much clearance between the pusher and its valve guide hole; cam profile; sometimes the starter latch is loose and the pulley is damaged (visible squeaking when changing).diet).
The sound is chaotic when maintaining a certain speed, and short-term sounds occur one after the other during rapid deceleration. The reasons for the noise are: the camshaft timing gear is cracked or its fixing nut is loose; the crankshaft is broken; the piston pin bushing is loose; The camshaft axial play is too large or its bushing is loose.
How to judge the abnormal noise of the motor belt:
First of all, check the motor belt. If there are multiple belts in the car and you cannot determine which belt is the problem, you can start the car first and then pour water on the belt. If the abnormal noise disappears, there is a problem with this belt. and you can check. Maybe it's loose or the quality is bad.
SendIf the motor belt makes an abnormal noise, pour water into itus will increase its viscosity, which in fact improves the viscosity of the belt. But after the water dries, the belt will return to its original state. This is the principle of belt watering.