4125发动机“烧瓦抱轴”的几个原因:(1)各道主轴瓦不同轴;(2)曲轴弯曲度超限;(3)曲轴轴颈表面有裂纹;(4)主轴承盖有裂纹,受压变形;(5)主轴承盖与机体间有间隙,主轴承失去定位作用;(6)瓦背与瓦座之间或瓦盖分离面间进入杂物;(7)轴颈与轴瓦表面光洁度太低;(8)搪瓦与卡轴时,旋紧主 4125 Engine “Burning tile holding axle ” for several reasons: (1) Each axle bearing is not coaxial; (2) Crankshaft bending overrun; (3) Crankshaft journal surface cracks; (4) The main bearing (5) the main bearing cap and the body gap, the main bearing loss of positioning effect; (6) between the tile back and tile or tile cover separation surface into the debris; (7) journals And bearing surface finish is too low; (8) Boring and card axis, screw tight the main