Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Jeep TJ (CANADA) L4-2.5LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. COOLING SYSTEM MUST BE PARTIALLY DRAINED BEFORE REMOVING THE COOLANT TEMPERATURE SENSOR.
The coolant temperature sensor is installed in the thermostat housing.
REMOVAL
1. Partially drain cooling system until coolant level is below cylinder head. Observe the WARNINGS in Cooling.
2. Disconnect coolant temperature sensor wire connector.
3. Remove sensor from thermostat housing.
INSTALLATION
1. Apply sealant to sensor threads (new replacement sensors will have sealant already applied).
2. Install coolant temperature sensor into thermostat housing. Tighten to 11 N.m (8 ft. lbs.) torque.
3. Connect wire connector.
4. Fill cooling system.
Engine Coolant Temperature Sensor - Typical:
The coolant temperature sensor is installed in the thermostat housing.
REMOVAL
1. Partially drain cooling system until coolant level is below cylinder head. Observe the WARNINGS in Cooling.
2. Disconnect coolant temperature sensor wire connector.
3. Remove sensor from thermostat housing.
INSTALLATION
1. Apply sealant to sensor threads (new replacement sensors will have sealant already applied).
2. Install coolant temperature sensor into thermostat housing. Tighten to 11 N.m (8 ft. lbs.) torque.
3. Connect wire connector.
4. Fill cooling system.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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