[Car spark plug replacement] How often should car spark plugs be replaced? How to tell whether spark plugs should be replaced?
How often should spark plugs be replaced?
If you find that the vehicle’s fuel consumption increases, you can consider whether to replace the spark plugs. Generally, repair shops will recommend replacing them every 20,000 to 30,000 kilometers, because the spark plugs are not completely damaged at this time. , but the performance is reduced. In fact, this depends on the quality of the spark plug. Ordinary spark plugs3-4 should be replaced every 10,000 kilometers, while platinum and iridium spark plugs should have 6~8 Just replace it once every 10,000 kilometers. Generally, it ranges from a few dozen yuan to a hundred yuan. Find a reliable repair shop for installation. The installation process takes a short time and you can generally check it yourself. This can save money and avoid unscrupulous repair shops from reusing used spark plugs removed from other people’s cars.
How do you know if the spark plug should be replaced?
1. Actual vehicle inspection: It is best to operate under the guidance of professionals. Car owners know more about this common sense is used to identify repair recommendations from professionals and is best avoided by doing it yourself.
(1)Short circuit: Let the engine run at idle speed, use a screwdriver to short-circuit the spark plugs cylinder by cylinder, and listen carefully to the changes in engine speed and sound. If the speed and sound change significantly, it indicates that the spark plug is normal. When the speed and sound are not obvious, it indicates that the spark plug is in an abnormal state.
(2)Flashover: Unscrew the spark plug, place it on the cylinder block, and test the fire with a high-voltage wire. If there is no spark or the spark is weak, it means the spark plug is leaking or not working.
2Observe the appearance color: Car owners can learn this method and do it themselves after the maintenance personnel remove the spark plugs Judgment check.
Remove the spark plug and observe, and judge the use condition of the spark plug based on the following appearance and color observation:
(1)If it is russet or rusty, the spark plug is normal;
(2)If it is oily, it indicates that the spark plug gap is out of balance orToo much oil supply, short circuit or open circuit of high voltage line;
(3)If It is smoked black, indicating that the spark plug hot and cold type is wrongly selected or the mixture is rich and the oil is flowing;
( 4)If there is a deposit between the top and the electrode, and the deposit is an oily substance, it proves that the cylinder oil is channeling, and it has nothing to do with the spark plug; if the deposit is black, it means that the spark plug has carbon deposits In the bypass; the gray deposit is due to misfire caused by the additives in the gasoline covering the electrodes;
( 5)If the spark plug is severely ablated, with scars, black lines, cracks, electrode melting, etc. appearing on the top, this indicates that the spark plug has been damaged and must be replaced immediately.
Avoid long-term use, avoid long-term failure to remove carbon deposits, avoid random descaling, and avoid burning. This extends spark plug life and ensures economical and safe engine operation.
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