[Auto Repair Knowledge]Five rules should be paid attention to when disassembling and assembling spark plugs of cars

carSpark plugDisassembly and assembly should pay attention to 5 rules (1) UnplugHigh-voltage lineThe joint should be gentle, and the spark plug insulator should not be shaken with force during operation, otherwise the sealing performance of the spark plug will be damaged. (2) The engine can be disassembled after cooling. When the spark plugs to be disassembled are loosened, use a thin hose to blow off the dirt around the spark plugs one by one. After the spark plugs are screwed out, the dirt will fall into the combustion chamber. (3) Around the screw, spark plug electrode andGasketIt must be kept clean, dry and free of oil, otherwise it will cause electric leakage, air leakage, spark weakening and other faults. (4) When installing, first align the spark plug with the screw hole with a sleeve, screw it in gently by hand, screw it to about 1/2 of the full length of the thread, and then tighten it with an afterburner lever. If the hand feels unsmooth when screwing, you should exit to check whether there are impurities in the alignment screw or thread, and you must not blindly tighten it, so as not to damage the screw hole and damage the cylinder head, especially the aluminum alloy cylinder head. (5) It should be tightened according to the required torque, too loose will cause air leakage, and too tight will cause the sealing gasket to lose its elasticity, and it will also cause air leakage. Since cone-seat spark plugs do not use gaskets, it is particularly important to observe the tightening torque. Related: ·Talking about the cause of abnormal noise in the engine cylinder[汽车修理常识]
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