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我公司有台１２Ｖ１３５ＪＺＤ柴油机入厂二保时，发现其排气门推杆严重弯曲变形。更换了弯曲的气门推杆，重新调整气门间隙后，盘车时发现，Ⅲ、Ⅳ缸排气门间隙变化量达到１ｍｍ左右。因此，我们决定对进、排气机构进行彻底检查。通过检查，发现排气门的气门杆尾端凹槽处轴向
My company has a 12V135JZD diesel engine into the second security, found that the exhaust valve serious bending deformation. Replace the curved valve push rod, adjust the valve clearance, the steering wheel found, Ⅲ, Ⅳ cylinder exhaust valve clearance change of 1mm or so. Therefore, we decided to thoroughly inspect the intake and exhaust mechanisms. Through inspection, it was found that the tail end of the exhaust valve stem groove at the axial direction