Water pump [Toyota Carina T170]

The water pump is not repairable and must be replaced if it fails or is damaged. To check the pump shaft, check the bearing play and install a new pump if the bearings are worn.

Removal and installation the pump

Removal and installation of the pump on both engines is different due to differences in the drive.

Engine 1.6 l

• Drain the coolant as described in chapter 4.1.
• Before removing the V-belt, unscrew the 4 water pump pulley bolts.
• Loosen the bolts securing the alternator to the body and to the tension bar and remove the V-belt.
• Unscrew the water pump pulley and remove it from the shaft.
• Disconnect the water hoses from the water pump tube.
• Unscrew the pipe from the engine side. It is secured with one bolt to the cylinder block and two nuts from the back of the water pump. Remove the sealing ring.
• Unscrew the dipstick guide tube and remove it together with the dipstick. Immediately cover the opened hole with a rag to prevent foreign objects from getting into the engine.
• Unscrew the top cover of the timing belt
• Loosen the three pump bolts and remove the pump. Avoid contamination of the engine with leaking coolant, which should not get on the toothed belt. When installing the old pump, clean the contact surface of the pump. When installing the water pump, install a new sealing ring. Tighten the pump bolts to a torque of 12-17 Nm. Bcq the remaining work is carried out in reverse order. Finally, pour coolant into the engine and check for leaks. Adjust the tension of the V-belt of the water pump and alternator, as described below.

Engine 2.0 l

• Drain the coolant as described in chapter 4.1, and collect it in a container if it was recently poured into the engine.
• Disconnect the water hose from the inlet fitting.
• Remove all timing drive components as described in chapter 2.8 for the corresponding engine. This also includes the alternator V-belt.
• Unscrew the heater pipe (bolt and nuts).
• Unscrew both nuts of the water drain pipe from the water pump in the place shown in Figure 123.

• Loosen the three water pump bolts in the sequence shown in Figure 124 and remove the water pump together with the sealing ring and gasket.

• If necessary, unscrew the pump cover (this is a part of the pump with an inlet fitting, inside which there is a thermostat) and remove the gasket between the cover and the pump body.
• The pump is assembled and installed in the reverse order. Insert a new gasket between the housing and the cover and install both parts on two bolts. Tighten the bolts to a torque of 9 Nm. Install a new sealing ring of the water pump outlet pipe in the recess of the pump cover. Put on a new gasket and install the pump on the engine. Tighten the bolts in the reverse order shown in Figure 124, to a torque of 9 Nm. Install and tension the toothed belt as described when installing the cylinder head on the 2.0 l engine. Adjust the tension of the alternator V-belt and fill the cooling system with liquid.

4.3.2. Water pump repair

Technically, the 1.6L engine water pump can be repaired, but it requires a special tool to press out the pulley hub, water pump bearing and impeller wheel. Therefore, if leaks are detected or the shaft bearing is difficult to turn when turning the hub (1.6L engine) or drive gear (2.0L engine), it is recommended to install a new pump. On a 2.0 l engine, the cover may unscrew from the housing. This is required, for example, when replacing the water pump. It is recommended to simultaneously remove the thermostat from the inlet fitting, especially if there are problems with the cooling system. After this, you should check the thermostat (chapter 4.4). Figure 126 shows the installation drawing of this water pump, where the installation position of the thermostat is also visible.

V-belt tension | water pump (1.6L engine)

Depending on the installed units, the V-belt routing on the 1.6 l and 2.0 l engines is different. The V-belt should be tensioned so that the belt can deflect by approximately 8.5-10 mm in the middle between the crankshaft belt and water pump pulleys when a force of 10 kg is applied. The value is different for a new belt and a used belt. The specified value is given for a new belt, for a used belt it is sufficient if it deflects by 10-12 mm under this force. The tension of the remaining belts is described in the corresponding chapter. To adjust, loosen the generator and tension bar mounting bolts and press the generator outward with a powerful screwdriver until the required tension is achieved. After adjustment, tighten the bolts. The tightening torque of the tension bar is 12-15 Nm; tighten the lower bolts to a torque of 20–25 Nm.