What Causes the Sizzling Sound When Starting the Car?

[VanCooper]

The reasons for the sizzling sound when starting the car are: 1. Timing chain failure; 2. Aging of the drive belt; 3. Three-way catalytic converter failure; 4. Engine temperature too low; 5. Engine belt slippage; 6. Severe wear of the starter and flywheel; 7. Valve train failure; 8. Excessive gap between the hydraulic system and valves inside the engine cylinder head. The steps to start the car are: 1. Insert the key into the ignition switch, turn it up one notch to activate the fuel pump for oil supply and initiate self-check of electrical equipment; 2. Press the clutch and turn the key further up to start the vehicle; 3. Press the clutch, shift gears, and release the handbrake.