Chevrolet Cobalt Service & Repair Manual: Water Pump Assembly R&R
| 1. |
Remove the engine coolant temperature
sensor, Fig. 1. |
| 2. |
Remove the thermostat and water feed
pipe retaining bolts, Fig. 2. |
| 3. |
Remove the thermostat housing and water
feed pipe from the water pump cover. |
| 4. |
Remove the water pump retaining bolts.
Be sure to remove the bolt that goes through the front of the engine
block, Fig. 3. |
| 5. |
Remove the water pump assembly. |
| 6. |
Remove the water pump sprocket (2)
and bolts (1), if required, Fig. 4. |
| 7. |
Reverse procedure to install, noting
the following: |
| |
a. |
Torque water pump sprocket bolts
to 89 inch lbs. |
| |
b. |
Torque water pump bolts to 18
ft. lbs. |
| |
c. |
Torque water pump drain plug
to 15 ft. lbs. |
| |
d. |
Torque thermostat housing to
block bolts to 89 inch lbs. |
| |
e. |
Torque engine coolant temperature
sensor to 15 ft. lbs. |
|
Fig. 1 Engine coolant temperature sensor replacement
Fig. 2 Thermostat and water feed pipe replacement
Fig. 3 Water pump replacement
Fig. 4 Water pump sprocket replacement
Removal
Prevent crankshaft from rotating
clockwise or counterclockwise before using compressed air in cylinder. Rotation
of crankshaft may cause damage to flywheel holding tool.
...
1.
Disconnect the negative battery cable.
2.
Remove the camshaft cover.
3.
Remove the timing chain tensioner,
...
See also:
Chevrolet Cobalt Service & Repair Manual. Noise, Diagnosis
A visual inspection must always
be performed to confirm the presence of aftermarket components, potential
collision damage, or areas of concern.
A noise produced by a vibration
can be diagnosed in the same manner as a vibration. A noise produced by
wind, leaks, or ...
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