Hitachi 4HK1 Workshop Manual page 39

1. Overheat switch
2. Engine coolant temperature sensor
8. CMP sensor removal
1. Remove the CMP sensor from the cylinder head
assembly.
Caution：
・ Be careful not to subject the sensor to shock.
9. Idle gear C removal
1. Press the idle gear C cover using the driver.
Note：
・ Lightly tap the outer perimeter of the cover
using a screwdriver and tilt the cover.
2. Remove the idle gear C cover from the cylinder head
assembly using the pliers.
Mechanical (4HK1) 1B-15
3. Remove the idle gear C from the cylinder head
assembly.
1. Idle gear C
2. Idle gear shaft
10. Valve spring removal
1. Press the valve spring using the special tool.
SST: 5-8840-2621-0 - valve spring replacer