B2300 Regular Cab 2WD L4-2.3L VIN A (1997)
Thermostat: Service and Repair
REMOVAL
1. Disconnect the negative battery cable.
2. Drain the engine coolant.
3. Disconnect the heater return hose from the thermostat housing.
4. Remove the thermostat cover.
5. Remove the thermostat.
6. Remove the thermostat housing gasket.
INSTALLATION
1. Position the gasket on the cylinder head before the thermostat is installed.
2. Install the thermostat into the thermostat cover and rotate the thermostat into the water outlet connector in a clockwise direction to secure the
thermostat to the connector.
NOTE: It is critical that the correct thermostat alignment is made, to provide coolant flow to the heater.
3. Install the thermostat cover.
Tightening torque: 20-30 Nm (14-21 ft. lbs.)
CAUTION: Position the hose clamp in the original position on the hose, and squeeze the clamp lightly with large pliers to ensure a good fit.
4. Fill the radiator with the specified amount and type of engine coolant.
5. Connect the negative battery cable.
6. Start the engine and check for leaks.
7. Bleed the cooling system.
