Gasoline engines have spark plugs, one cylinder one plug, and a single high-speed petrol engine with two spark plugs per cylinder. Although the spark plug is a small part, but it is extremely important. The role of the spark plug is the ignition coil generated by the pulse of high voltage into the combustion chamber, the use of electrodes generated by the spark ignition mixture to complete the combustion.
How long does it take for a spark plug?
Due to the different spark plug material, the type of spark plug can be divided into: ordinary copper, yttrium gold, platinum, iridium, platinum iridium alloy spark plugs, these types of spark plugs life is different, the corresponding replacement mileage is also different Choose to distinguish clearly.
In general, the normal use of the case, the ordinary spark plug life of 30,000 km, and precious metal spark plugs life of 6 to 9,000 km, different models of car manufacturers under the maintenance cycle is not exactly the same, so the specific Replacement cycle should also be the standard car manufacturers. Do not arbitrarily extend the need to choose the machine to replace.
If you find the vehicle fuel consumption increases, you can consider whether to change a spark plug, the general repair shop will recommend two or three thousand kilometers to replace, because when the spark plug is not completely damaged, but the performance has declined. In fact, this is the quality of the spark plugs, the ordinary spark plug 3-4 million for a time, platinum, iridium gold 6 to 8 million km for a time. Usually in the tens of dollars to a hundred dollars. And then find a reliable repair shop for installation, the installation process is very short, the general can personally view, so that you can also save money can also avoid the black heart repair shop to remove the car from someone else's new spark plug again.
Second, how to determine the spark plug damage?
1, real car inspection: the best under the guidance of professional operations, the owner to understand this common sense is more used to identify the maintenance of professional advice, it is best not to do it yourself.
(1) short circuit: the engine idling operation, with a screwdriver on the cylinder short of the spark plug, listen to the engine speed and sound changes, speed and sound changes significantly, indicating that the spark plug normal. Speed and sound are not obvious when the spark plug has been in an abnormal state.
(2) flashover: unscrew the spark plug, on the cylinder block, with high pressure line test fire, if no spark or spark is weak, indicating that the spark plug leakage or not work.
2, observe the appearance of color: the owner can learn this method, in the maintenance personnel to remove the spark plug after the judge can check their own.
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 auburn or rust color, indicating that the spark plug normal;
(2) if it is stained oil, indicating that the spark plug gap or excessive oil supply, high voltage short circuit or open circuit;
(3) if it is smoked black, indicating that the spark plug hot and cold type selected wrong or mixed gas thick, oil up the channeling;
(4) If there is a sediment between the tip and the electrode and the sediment is an oily substance, it is proved that the cylinder is channeling oil and has nothing to do with the spark plug; if the deposit is black, the spark plug is carbonized and the sediment is gray Because the gasoline in the additive cover the electrode caused by the lack of fire;
(5) If the spark plug is severely ablated, the top appears scarring, black lines, rupture, electrode melting and so on, which indicates that the spark plug has been damaged and must be replaced immediately.
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