单项选择题
A.soft water pump was not secured along with the engine
B.jacket water thermostat has failed
C.cylinder liner may be cracked
D.raw water pump is over-speeding just prior to engine shutdown
单项选择题 If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）
单项选择题 A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze, the white coloring indicates（）
单项选择题 If a diesel engine turned over freely but failed to start, the cause could be （）