| 主权项 |
1. An internal combustion engine for a vehicle comprising:
a cylinder block having a cylinder head connected to an upper end of the cylinder block, a front end of the cylinder block having a coolant introduction passage; a timing chain provided at the front end of the cylinder block and engaged to a camshaft sprocket operably associated with the cylinder head; a timing chain cover mounted to the cylinder block and spaced forward of the front end of the cylinder block; and a water pump assembly including a pump housing and an impeller assembly, the pump housing being directly secured to the cylinder block and interposed between the timing chain cover and the front end of the cylinder block, the pump housing having a pump chamber in fluid communication with the coolant introduction passage, the impeller assembly being removably mounted in the pump chamber of the pump housing, the impeller assembly including an impeller having a hub affixed to a drive shaft to be rotated about an axis defined by the drive shaft, an end of the drive shaft extending forward of the timing chain cover, the impeller assembly being adapted to be removed from the pump housing without removal of the timing chain cover. |
