正时齿轮无记号或记号不清怎么办范新为使配气凸轮轴和喷油泵等与曲轴旋转保持严格的相对位置关系，正时齿轮端面上都打有装配标记，安装正时齿轮时，必须将相应标记对准，方能保证发动机正常工作。如果正时齿轮无记号或记号不清时怎么办呢？可按该机型的配气相位和供油提... Timing gear no mark or unclear how to do Fan new To make the distribution of camshafts and fuel injection pumps and crankshaft rotation to maintain a strict relative position, the timing gear are marked with a mounting mark, the installation of timing gear, The corresponding marks must be aligned in order to ensure the normal operation of the engine. If the timing gear no mark or not clear how to do it? According to the model of the gas phase and oil supply mention ...