4 cylinder engine
2. All 4-cylinder engines have the same water pumps, however, on certain engines, a drive belt tensioner plunger is installed in the pump housing. If the instructions below are followed when removing the pump, the tensioner may remain on the pump (see illustration). Never remove such a pump without loosening the tensioner. Before removing the pump, disconnect the negative cable from the battery and drain the liquid from the cooling system.
8.2 Water pump with toothed belt tensioner installed
3. Remove the fan together with the motor. Remove the radiator as described in Chapter 3. Loosen the alternator mounting bolts and remove the drive belt. In the same way (where installed) Remove the power steering pump drive belt. Lock and remove the water pump pulley.
4. If the water pump shown in illustration 8.2 is installed, put a clamp on the pump and tighten to hold the tensioner in the hole (see illustration). If there is no clamp, tie the parts with a piece of wire. The pump without tensioner is shown in illustration 8.4b.
8.4a Clamp holds the tensioner on the water pump
8.4b Water pump without tensioner
5. Disconnect the carburetor preheating hose and coolant supply hose from the pump and unscrew the water pump bolts. Remove the pump. If the pump is stuck in the cylinder head, tap it with a rubber mallet.
6. To check the pump, hold the pump housing with one hand and turn the pump drive pulley hub with the other. This makes it easy to find a damaged or seized bearing. In this case, replace the pump immediately.
7. If a pump with a tensioner is being replaced, rearrange the parts of this device to a new pump.
8. Install in reverse order. The seal between the pump and the cylinder head must be installed dry. Change the gasket every time. Never apply sealant to the bearing surfaces, otherwise it will be difficult to remove the pump.
9. When installing a pump with tensioner, reattach the clamp to the pump. After installing the pump, secure the coolant supply hose with two bolts.
10. Finally, adjust the belt tension and fill the cooling system.
V6 engines
11. The water pump cannot be repaired and must be replaced if damaged. The pump consists of a body and a cover with an intermediate gasket. These parts can be separated in case they need to be changed.
12. Before removing the pump, disconnect the negative wire from the battery and drain the liquid from the cooling system. Disconnect the wiring from the thermal switch terminal.
13. Disassembly is complicated by the fact that it is necessary to remove the air filter, intake manifold, oil distribution tube and drive belt.
14. Remove collars and disconnect pump hoses.
15. Turn out bolts of the water pump, the thermoswitch, a cover of a crankcase of the thermostat and remove the thermostat. Place dot marks on the outer edge of the thermostat and on the hole in the pump housing.
16. Disassemble the pump as shown (see illustration). Replace seal between parts 1 and 2. Clean surfaces of seal residue.
8.16 Details of the water pump of the engine V6. Lid (2) and the seal can separate from the body (1)
17. Install in reverse order. Install the seal without lubrication. Install thermostat. Make sure the o-rings are installed in the intake manifold.
18. Adjust the tension of the drive belt and fill in the coolant.