GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Malibu 🢒 Engine 🢒 Engine Cooling 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure

    Object Number: 1578458 Size: SH
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Disconnect the engine wiring harness electrical connector (1) from the engine coolant temperature (ECT) sensor.

    3. Object Number: 1713085 Size: SH
  3. Remove the ECT sensor.

Installation Procedure

    Object Number: 1713085 Size: SH

    Important: Use a tap in order to remove any sealant residue in the sensor hole in the thermostat housing. Clean any sealant residue from the old sensor (if reusing) and apply the room temperature vulcanizing (RTV) sealant to the threads.

  1. Apply sealant to the threads of the ECT sensor. Refer to Adhesives, Fluids, Lubricants, and Sealers .

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the ECT sensor.

    3. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).


    Object Number: 1578458 Size: SH
  3. Connect the engine wiring harness electrical connector (1) to the ECT sensor.
  4. Fill the cooling system as needed. Refer to Cooling System Draining and Filling .