What is the reason for the sudden loud noise from the engine fan?

1 Answers
DiGavin
07/29/25 1:28pm
There are several reasons for the loud noise from the car fan: Excessive bearing wear: Check the radiator and surrounding components to see if the bearing is excessively worn. If so, replacing the bearing should solve the issue. Also, check if the fan blades are rubbing against anything. If not, the fan itself might be faulty, and replacing the fan bearing or coupling would be necessary. Fan blades: Inspect the horizontal and vertical clearance of the motor rotor shaft. If there are no issues, remove the motor and fan to check if the fan blades are deformed. Nowadays, most car repair shops typically replace the entire motor. If the problem persists, open the motor to check if the rotor is rubbing against the stator.
Was this review help?
7
1
Share
More Forum Discussions

What are the differences between the Mercedes-Benz C-Class 200 and 260?

Mercedes-Benz C-Class 200 and 260 mainly differ in the following aspects: 1. Different engines equipped: (1) Mercedes 200: Equipped with a 264-915 type engine. (2) Mercedes 260: Equipped with a 264-915, 1.5L turbocharged + electric motor. 2. Different sunroofs: (1) Mercedes 200: Equipped with an electric sunroof. (2) Mercedes 260: Equipped with an electric panoramic sunroof. 3. Different dashboards: (1) Mercedes 200: Equipped with a classic analog dashboard. (2) Mercedes 260: Equipped with a full LCD dashboard.
15
3
Share

Should the tensioner pulley be replaced when changing the belt?

When replacing the belt, it is necessary to replace the tensioner pulley. Here is an extended introduction about the tensioner pulley: 1. Structure: The tensioner pulley mainly consists of a fixed housing, tension arm, wheel body, torsion spring, rolling bearing, and spring bushing. It can automatically adjust the tension according to the different tightness of the belt, ensuring the stability, safety, and reliability of the transmission system. 2. Function: The tensioner pulley is a wearable part in automotive components. Over time, belts tend to stretch. Some tensioner pulleys can automatically adjust the belt tension. Additionally, with a tensioner pulley, the belt operates more smoothly, reduces noise, and prevents slipping. The function of the tensioner pulley also includes adjusting the tightness of the timing belt.
12
1
Share

Will reversing up steps damage the car if it fails to climb?

Reversing up steps will not damage the car if it fails to climb, but incorrect methods can cause damage. Below is relevant information about rearview mirrors: Definition: The rearview mirror is one of the important safety components on a motor vehicle, used to observe the rear road conditions during reversing and to monitor the surroundings while driving. The interior generally features an anti-glare rearview mirror, which consists of a special mirror, two photodiodes, and an electronic controller. The electronic controller receives signals from the photodiodes for front and rear light detection. Material: The reflective coating of automotive rearview mirrors is typically made of silver and aluminum, though some use chromium. Currently, chromium mirrors have replaced silver and aluminum mirrors in foreign automotive rearview mirrors.
5
2
Share

Is the stopping gesture performed with the left or right hand?

Parking gesture is performed by traffic police extending their left arm forward and upward with the palm facing forward. Below are some introductions about traffic police gestures: Straight-through gesture: The traffic police extend their left arm horizontally while turning their head to the left, palm facing forward; then extend their right arm horizontally while turning their head to the right, palm facing forward, and swing it to the left; this is the straight-through gesture, indicating that vehicles on the right side of the traffic police can proceed straight. Right-turn gesture: The traffic police extend their left arm forward with the palm facing forward, indicating that vehicles directly ahead should stop; then the traffic police turn their head to the right, and the right arm and hand swing straight to the left front with the palm facing left, indicating that vehicles should make a right turn in the direction the traffic police's head is facing.
16
0
Share

What does Mercedes-Benz GLC-AMG Line mean?

Mercedes-Benz GLC-AMG Line is a type of vehicle model. AMG models include: Models such as A-45-AMG, CLA-45-AMG, C-63-AMG, etc. History: The history of Mercedes-AMG began in 1967, originating from two engineers who researched racing engines. The full name of AMG is Aufrecht-Melcher-Grossaspach. Currently, it is the official tuning company of Mercedes-Benz. Characteristics of AMG: AMG's modifications to the powertrain are not like those of other German professional tuning companies that replace the original engine with one of higher horsepower.
4
4
Share

How to Add Water to a Car Radiator?

The steps to add water to a car radiator are: 1. Open the pressure cap by turning it counterclockwise; 2. Fill the coolant up to the marked level; 3. Tighten the pressure cap and ensure it is fully seated. The function of the car radiator: to absorb heat from the engine block and prevent engine overheating and malfunctions. Precautions for using a car radiator: 1. Prevent the radiator from overheating; 2. Regularly replace the coolant; 3. Do not use tap water as a substitute for coolant; 4. Choose high-quality diluted water or antifreeze when selecting radiator fluid; 5. Perform regular anti-rust treatment on the radiator; 6. Address radiator malfunctions promptly to avoid causing other issues with continued use.
13
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.