Water Pump Installation (LTG)

Prior to installing the water pump, read the entire procedure. Pay special attention to avoid part damage and to ensure proper sealing.

Fig 1: Thermostat Assembly And Water Pump Assembly With Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY
1. Install a NEW water pump gasket (6) and the water pump assembly (5).
2. Install the water pump bolts (1). Finger tighten the bolts.
CAUTION:

Refer to Fastener Caution .

NOTE:

The sequence allows the fasteners closest to compress the seal.

3. Tighten the water pump bolts in sequence to 25 N.m (18 lb ft).
4. Install a NEW thermostat assembly gasket (4) and the thermostat assembly (2).
5. Install the thermostat assembly bolts (3) and tighten to 10 N.m (89 lb in).
Fig 2: Water Outlet Assembly Components
Courtesy of GENERAL MOTORS COMPANY
6. Install a NEW water outlet assembly gasket (3), and the water outlet assembly (1).
7. Install the water outlet assembly bolts (4) and tighten to 10 N.m (89 lb in).
8. Install the engine coolant temperature sensor (2).
9. Install the engine coolant temperature sensor retaining clip (5).
Fig 3: Thermal Bypass Pipe Bolts And Gasket
Courtesy of GENERAL MOTORS COMPANY
10. Connect the thermal bypass pipe (2) to the water outlet assembly.
11. Connect the thermal bypass hose to the engine oil cooler.
12. Install a NEW thermal bypass pipe gasket (3) on the thermal bypass pipe. Install the thermal bypass pipe to the water pump assembly. Install the bolts (1) and tighten to 10 N.m (89 lb in).