Perform the following procedures for removal and installation of the coolant pump.
Coolant Pump Removal
Remove the coolant pump as follows:
To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure.
Press the impeller onto the drive shaft and bearing assembly. See Figure
3. Sleeve Seal
2. Drive Shaft
Pressing in the Impeller
Secure both the drive shaft and hub to prevent them from turning while the impeller is being installed.
Measure the gap between the impeller and the coolant pump housing. This gap, listed in Table
, must be more than 0.6 mm (0.023 inch) and less than 1.0 mm (0.039 inch). See Figure
Gap Between the Impeller and the Coolant Pump Housing
Coolant Pump Assembly, Critical Dimension
2. Coolant Pump Housing
Gap Between the Impeller and the Housing
Rotate the coolant pump drive shaft to make sure it moves easily and freely.
Install the coolant pump on the engine.
Coolant Pump Installation
Install the coolant pump as follows:
Install the coolant pump on the cylinder block. Install a new gasket. Tighten the mounting bolts 30 Nm (22 lbft).
Connect the inlet pipe to the coolant pump housing, as removed. Install a new gasket on the mating surface between the inlet pipe and the coolant pump housing. Tighten the inlet pipe mounting bolts 50 Nm (37 lbft).
Tilt the alternator back into the correct position. Install the upper alternator mounting bolt and restore the alternator to operating condition.
Install the upper coolant tube onto the thermostat housing.
Install the coolant pump pulley and the mounting bolts attaching the coolant pump pulley to the coolant pump. Tighten the bolts 25 Nm (18 lbft).
Move the front idler and tensioner support back into place on the cylinder block. Tighten the mounting bolts 60 Nm (44 lbft).
Install the fan support on the cylinder block.
Release the belt tensioners for the main drive and fan belts. Route the two belts around their pulleys and restore the belt tension.
Install the fan.
Fill the engine with coolant, as removed, and check for leaks.