Japanese Original Used Second Hand Diesel Engine 4m51 Engine for Mitsubishi Canter

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4D30/4D30A/4DR7/S4S/6D16/4G13/4G54/4G63/4G64 6G72/4D55/4D56/4M40T/4M41

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Engine Assembly and Engine Parts for More models as following:

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What is the reason for the loud noise of car engines?

The problem of deflagration and detonation. When knocking occurs, that is, after the spark plug fires, the end combustible mixture spontaneously ignites. At this time, the flame center formed by the spark plug igniting the mixture is opposite to the new flame center formed by the end mixture spontaneous combustion. And spread at the speed of the impact, producing a sharp knocking sound, increasing engine noise.

Engine oil problems. If the viscosity of the vehicle's oil is too high, it will easily cause problems with the engine operation, poor lubriion, and cause loud engine noise. So go to the repair shop in time to check whether it is time to change the oil, or calculate by yourself whether the time for maintenance is up.

Idle speed problem, if the noise is loud when idling, and the vehicle idling speed is high, it is very likely that your car’s throttle, air intake, and fuel injectors should be cleaned, especially the throttle.