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.
2005 Buick Allure (CANADA) V6-3.6LFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT
REMOVAL PROCEDURE
CAUTION: Allow sufficient time for the engine to cool before removing the ECT sensor. A hot engine may cause an excessive coolant loss or a personal injury.
1. Turn the ignition OFF.
2. Partially drain the cooling system. Refer to Draining and Filling Cooling System.
3. Remove the coolant temperature sensor electrical connector.
4. Remove the coolant temperature sensor.
INSTALLATION PROCEDURE
1. Install the coolant temperature sensor.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the sensor to 22 N.m (16 lb ft).
2. Install the coolant temperature sensor electrical connector.
3. Inspect and fill the cooling system as necessary.
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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