Cherokee 4WD L6-4.0L VIN S (1998)
Thermostat: Service and Repair
REMOVAL
WARNING: Do Not Loosen The Radiator Draincock With The System Hot And Pressurized. Serious Burns From The Coolant Can Occur.
DO NOT WASTE reusable coolant. If the solution is clean, drain the coolant into a clean container for reuse.
1. Drain the coolant from the radiator until the level is below the thermostat housing.
WARNING: Constant Tension Hose Clamps Are Used On Most Cooling System Hoses. When Removing Or Installing, Use Only Tools
Designed For Servicing This Type Of Clamp, Such As Special Clamp Tool (number 6094). Snap-on Clamp Tool (number Hpc-20) May Be
Used For Larger Clamps. Always Wear Safety Glasses When Servicing Constant Tension Clamps.
Fig.7 Clamp Number/Letter Location
CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment
clamp with matching number or letter.
2. Remove radiator upper hose and heater hose at thermostat housing.
3. Disconnect wiring connector at engine coolant temperature sensor.
Fig.26 Thermostat Removal/Installation
4. Remove thermostat housing mounting bolts, thermostat housing, gasket and thermostat. Discard old gasket.
