Discovery I (LJ) V8-4.0L (1996)
Thermostat: Service and Repair
REMOVAL
1. Partially drain cooling system, until coolant level is below thermostat housing.
2. Disconnect hose from thermostat housing.
3. Disconnect electrical connections to water temperature switch.
4. Remove outlet elbow.
5. Withdraw thermostat.
INSTALLATION
1. Note rating of thermostat is 88° C (190° F). Place thermostat in a container half full of water. Heat water, observe temperature at which thermostat
opens. Thermostat is satisfactory if it opens between 85°-89° C (185°-192° F).
2. Insert thermostat with jiggle pin/vent hole uppermost (12 o'clock position).
3. Fit the outlet elbow and new joint washer. Tighten to 28 Nm (21 ft. lbs.).
4. Reverse 1 to 3.
5. Check for coolant leaks around all connections and joint faces.