Grand Cherokee 2WD L6-4.0L VIN S (1997)
4. Remove thermostat housing mounting bolts, thermostat housing, gasket and thermostat. Discard old gasket.
5. Clean the gasket mating surfaces.
INSTALLATION
1. Install the replacement thermostat so that the pellet, which is encircled by a coil spring, faces the engine. All thermostats are marked on the outer
flange to indicate the proper installed position.
a. Observe the recess groove in the engine cylinder head.
b. Position thermostat in groove with arrow and air bleed hole on outer flange pointing up.
2. Install replacement gasket and thermostat housing.
CAUTION: Tightening the thermostat housing unevenly or with the thermostat out of its recess may result in a cracked housing.
3. Tighten the housing bolts to 22 Nm (16 ft. lbs.) torque.
4. Install hoses to thermostat housing.
5. Install electrical connector to coolant temperature sensor.
6. Be sure that the radiator draincock is tightly closed. Fill the cooling system to the correct level with the required coolant mixture. Refer to Refilling
Cooling System in this group.
7. Start and warm the engine. Check for leaks.
