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.
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HOMESERVICE MANUALSCHEVROLET1998ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Service and Repair
Engine Coolant Temperature (ECT) Sensor Electrical Connector:
Engine Coolant Temperature (ECT) Sensor:
CAUTION: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
REMOVAL PROCEDURE
1. Relieve the coolant pressure.
2. Disconnect the negative battery cable.
3. Drain the cooling system below the level of the sensor.
4. Disconnect the electrical connector releasing locking tab.
5. Remove the coolant sensor from engine.
INSTALLATION PROCEDURE
1. Coat the threads (only) with sealer P/N 9985253 or equivalent.
Tighten
^ Tighten the sensor to 13 N.m (10 lb. ft.).
2. Install the coolant sensor in the engine.
3. Connect the electrical connector.
4. Refill the cooling system.
5. Connect the negative battery cable.
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.