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.
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
2000 Saturn LS1 L4-2.2L VIN FSECTION Service and Repair
REMOVAL
1. Turn ignition Off.
IMPORTANT: Engine coolant must be drained below level of engine coolant temperature sensor before removal. Refer to "Cooling System" for procedures on draining engine coolant.
2. Disconnect electrical connector from engine coolant temperature sensor.
3. Remove engine coolant temperature sensor using a 19 mm deep-well socket.
INSTALLATION
IMPORTANT: Tap out sensor mounting hole in engine to remove any thread sealant residue. Clean any thread sealant from sensor threads and coat sensor with correct thread sealant if installing the same sensor.
1. Apply thread sealant Loctite(R) 242 Threadlocker (or equivalent) to sensor threads.
2. Install engine coolant temperature sensor.
Torque: 10 N.m (89 in-lbs)
3. Connect electrical connector to the engine coolant temperature sensor. Push in until a click is heard and pull back to confirm a positive engagement.
4. Refill engine coolant as described in the "Cooling System".
RENDER: 1.0x
NO RELATED
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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.