What Causes the Squeaking Sound When a Car Just Starts?

1 Answers
LaElizabeth
07/30/25 8:39am
The reasons for the squeaking sound when a car just starts are: 1. The engine temperature is too low; 2. The three-way catalytic converter expands due to heat; 3. Transmission failure causing internal gear friction; 4. Wear of the engine belt or chain; 5. Wear or system pressure loss in the hydraulic tappet; 6. The clutch pedal return spring is too soft; 7. Worn, loose, damaged bearings or loose fastening nuts. The correct method to start a car is: 1. Insert the key and keep it in the 'lock' position for about 2 seconds; 2. Turn it to the 'on' position and wait for about 5 seconds for the car computer to self-check; 3. Turn the key to the 'start' position to ignite, and release the key after starting; 4. Let the car warm up in place for about 30 seconds to 1 minute; 5. Press the brake, shift to 'D' gear, then release the handbrake and foot brake to start driving.
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