Spark Plug: Inspection
WARNING: This page is about a different variant/trim than selected.
CAUTION:
Cleaning platinum plugs may damage the platinum center electrode or the thin platinum pad.
- Check that the spark plugs used are the correct ones. Refer to CAPACITIES AND RECOMMENDED FLUIDS, SPECIFICATIONS
.
- Check that the spark plug insulator is not broken.
- Check that the spark plug electrode is not deformed or broken.
- Check that the spark plug electrode is not melted.
- Check that the spark plug electrode does not show signs of dirt from incorrect combustion.
- Check that there are no deposits.
- Check that there is no rust.
- Check that the hexagonal nut is free of defects.
- Check that there are no cracks in the insulator caused by incorrect use of the spark plug socket.
- Check that there is no damage to the ignition coil insertion terminal.
- Check that there are no signs of burning on the spark plug insulators.
- Using an insulation tester, check that the resistance is greater than 50 Ohm with a voltage of 1000 V applied between the metal shell and the insulator.
- Measure the resistance between the spark plug terminal and the central electrode. Check that the resistance is between 3 kOhm and 7.5 kOhm.
- Check that the spark plug electrode is not crushed.
- Check that the spark plug electrode has no abrasions.
- Check the spark plug electrode gap with a gap gauging tool. Refer to CAPACITIES AND RECOMMENDED FLUIDS, SPECIFICATIONS .