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1 大修后气门间隙越来越小一台大修后的玉柴6105QC型柴油发动机,在走合期内,便出现了气门间隙越来越小的故障,导致气门关闭不严,气缸压力降低,发动机工作无力,动力不足。严重时,汽车无法正常运行。多次检查、调整气门间隙,均不奏效。每次将气门间隙调到标准值,发动机运行不到几个小时,气门间隙就变小,甚至完全消失。
1 after the overhaul valve clearance smaller and smaller After an overhaul of Yuchai 6105QC diesel engine in the period of convergence, there have been smaller and smaller valve clearance failure, resulting in lax valve closure, reducing cylinder pressure, the engine Lack of motivation, lack of motivation. Serious, the car can not be normal operation. Check multiple times, adjust the valve clearance, are not working. Every time the valve clearance transferred to the standard value, the engine runs less than a few hours, the valve clearance becomes smaller, or even disappear completely.