1.缸盖与气门罩之间垫片厚度此垫片起密封作用,薄厚直接影响减压效果。若过薄,减压机构的偏距调节不了,减压轴上的凸柄一直压着气门摇臂,使进气门常开启,气缸无压缩力,导致柴油机不能着火。相反,垫片过厚,等于将气门罩远离缸盖,虽将偏距调到最大(1.5毫米),轴 1 cylinder head and gaskets gasket thickness between the gasket from the sealing effect, the thickness of a direct impact on decompression effect. If it is too thin, the pressure relief agencies can not adjust the offset, the shaft on the decompression axis has been pressing the valve rocker arm, so that the intake valve is often open, the cylinder without compression, resulting in diesel engine can not fire. On the contrary, the gasket is too thick, equal to the valve cover away from the cylinder head, although the offset to the maximum (1.5 mm), the shaft