The spark plug was replaced by yourself for the second time at 120,000 kilometers, and there was no problem at 60,000 kilometers.
LenAbe 
12 The 12-year-old car has traveled 120,000 kilometers. According to its own plan and maintenance arrangements, the spark plug will be replaced in the near future. First, it will check how the engine burns. Second, the spark plug will expire and replace it regularly. For the sake of the old car. For better work, this time I decided to try a better quality spark plug, NGK semi-iridium gold spark plug, iridium gold design, long-lasting spark plug, and the theoretical working mileage is 8W kilometers. Buy materials in advance, get ready for work, wait until the kilometer count, and start working.
The spark plug was replaced for the second time at 120,000 kilometers, and the spark plug was replaced once at 60,000 kilometers without any problems
There are 4 screws in a week. Use a T30 tool to prepare to lift the plastic cover.
Loosen the screws to remove the cover. There is a thick layer of dust inside. After all, you can’t open it for cleaning. You can just clean it with a towel or a small brush.
Wash with a towel or small brush and vacuum up dust.
Use the special ignition coil puller I bought last time to pull out the ignition coil. The unprofessional operation is to directly pry it up with a single lift, which may easily damage the ignition coil.
Check the ignition coil of a cylinder for cracks, discoloration, etc. If found, replace it in time. This is still good.
If the ignition coil of a cylinder is cracked, discolored, etc., if found, replace it in time. This is still good. Apply anti-arc paste in time.
It takes some strength to pull out the ignition coil of one cylinder smoothly.
Replace a cylinder of spark plugs.
Use a special spark plug tool to remove and tighten the spark plug. This tool is easy to use. Turn the key clockwise by 1/2.
Once one cylinder is replaced, replace the spark plugs of the other cylinders in the same sequence and technique.
Replace the spark plug of cylinder 2 in the same sequence and technique.
Replace the spark plug of cylinder 2 in the same sequence and technique.
Replace the spark plugs of the three cylinders in the same sequence and technique.
Replace the spark plugs of the three cylinders in the same sequence and technique.
Replace the spark plugs of the four cylinders in the same sequence and technique.
Replace the spark plugs of the four cylinders in the same sequence and technique.
Replace the spark plugs of the four cylinders in the same sequence and technique.
First tighten the spark plug by hand to ensure accurate threads.
Iridium gold design, long-term spark plug, theoretical working mileage of more than 8W kilometers.
First tighten the spark plug by hand to ensure accurate threads.
Put on a special wrench and turn clockwise for 1/2 turn. Replace the spark plugs of other cylinders in the same sequence and technique.
The spark plug is in normal condition, indicating that the combustion is also good.
The spark plug is in normal condition, indicating that the combustion is also good.
Finally press the ignition coil into place. Go out for a test drive to see if the power of the vehicle is normal. After returning from the last lap, everything was checked to be normal, and the spark plug was replaced. As a wearing part, spark plugs need to be replaced regularly, and they need to be replaced every 60,000 kilometers, which can keep the car working in a better condition.
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