How often should the spark plugs be replaced on a Ford Focus?
1 Answers
Ford Focus spark plugs should be replaced every 40,000 kilometers. The spark plug is a crucial component of the gasoline engine's ignition system. It introduces high-voltage electricity into the combustion chamber and generates a spark by jumping across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. The steps for replacing spark plugs are as follows: 1. Disconnect the ignition coil wiring harness plug and remove the ignition coil mounting bolts; inspect the spark plug for damaged terminals, check if the insulator is punctured, and examine electrode wear; 2. Select appropriate tools, assemble the tools, remove the spark plugs, and take them out one by one; cover the spark plug holes on the cylinder with a clean cloth to prevent foreign objects from entering the engine block; 3. Align the ignition coil with the spark plug, install it in place, and use tools to screw in the bolts; clean the measuring tool, measure the spark plug gap, and evaluate the spark plug; 4. Check the new spark plug for any visible issues, place the spark plug into a dedicated socket, screw it into the spark plug hole using a digital torque wrench set to 25 Nm, tighten the spark plug, turn off the ignition switch, open the hood, and install the three-piece set; 5. Use a digital torque wrench to tighten to 8 Nm. Start the vehicle, clear any faults, and tidy up the work area.
