What is the procedure for replacing spark plugs?

1 Answers
StJoy
07/30/25 4:19am
The procedure for replacing spark plugs is: 1. Open the car hood and remove the engine panel to expose the ignition wires; 2. Pull out the ignition wires by hand, noting that each wire corresponds to one spark plug; 3. Unscrew the spark plugs using an extension socket; 4. Install the new spark plugs. The normal electrode color of a spark plug is grayish-white. If the electrode is blackened with carbon deposits, it indicates a malfunction. During inspection, connect the spark plug to the cylinder block and touch the central high-voltage wire to the spark plug terminal. Then turn on the ignition switch and observe the high-voltage spark position. If the spark occurs at the spark plug gap, the spark plug is functioning properly; otherwise, it needs to be replaced.
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