How often do you change the spark plugs in your car? How to see if you should change the spark plugs?

How often do you change the spark plugs?

If you find that the vehicle fuel consumption increases, you can consider whether to change a spark plug, it is generally recommended that 20,000 to 30,000 kilometers on the replacement, because at this time, although the spark plug is not completely damaged, but the effectiveness of a decline. In fact, this is according to the quality of spark plugs, ordinary spark plugs 3-4 million kilometers for a change, platinum, iridium 6-8 million kilometers for a change can be.

How to see the spark plugs should be changed?

1. the actual car check: best operated under the guidance of professionals

(1) short circuit: let the engine idle, use a screwdriver to short circuit the spark plug cylinder by cylinder, listen to the engine speed and sound changes, speed and sound changes are obvious, indicating that the spark plug is normal. Speed and sound are not obvious when the spark plug has been in an abnormal state.

(2) jumping fire: spin off the spark plug, put it on the cylinder block, use the high voltage line to test the fire, if there is no spark or weak spark, indicating that the spark plug is leaking or not working.

2.observe the appearance of the color: in the maintenance personnel to disassemble the spark plug can judge their own check.

Remove the spark plug to observe, according to the following appearance of color observation to determine the use of spark plugs:

(1) If it is russet or rust color, indicating that the spark plug is normal;

(2) If it is impregnated with oil, it indicates that the spark plug gap is out of adjustment or the oil supply is too much, and the high-pressure wire is short-circuited or disconnected;

(3) If it is smoky black, it indicates that the spark plug hot and cold type is selected wrongly or the mixture is thick, and the oil runs up;

(4) If there are deposits at the top and between the electrodes, the deposits are oily, proving that the cylinder oil, not related to the spark plug; if the deposits are black, it means that the spark plug carbon buildup and bypass; deposits are gray because of gasoline additives cover the electrode caused by the lack of fire;

(5) If the spark plug is seriously eroded, the top of the scar, black lines, rupture, electrode melting and other phenomena, which indicates that the spark plug has been damaged, must be replaced immediately.

Summarize: daily use of the car in the process to do a good job in the maintenance and replacement of spark plugs, specific should do "five taboo", that is, the use of spark plugs in the process of avoiding hot and cold, avoiding long-term use, avoiding long-term removal of carbon deposits, avoiding random descaling, avoiding fire. This can prolong the life of the spark plug, to ensure that the engine economy, safe operation.