Other possible reasons include problems with the oil pump, rod and main bearing clearances, camshaft stopping playing, or cam bearings and lifters.

其他可能的原因包括油泵问题、杆和主轴承的空隙、凸轮轴停止工作、或者凸轮的方位和升降。

Small clearances between vital parts.

关键部件之间的间隙小。

Checkhigh/low speed thrust bearing axial float clearances.

检查高/低速轴向推力轴承浮动许可。

Most special clearances are resolved within 30 days of application.

大多数的特殊通关在30天的申请里面被决定。

Licences, authorizations, security clearances and other formalities.

许可证，其他许可，安全清关和其他手续。