GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Camaro 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure

    Important: Care must be taken when handling the Engine Coolant Temperature sensor. Damage to the engine coolant temperature sensor will affect proper operation of the fuel injection system.


    Object Number: 21671 Size: MH
  1. Drain the radiator coolant.
  2. Disconnect the electrical connector.
  3. Using a 19 mm deep well socket, remove the sensor.

Installation Procedure

    Object Number: 21671 Size: MH
  1. Coat engine coolant temperature sensor threads with sealer P/N 1052080 or equivalent.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Hand start the ECT sensor into the engine.

    3. Tighten
    Tighten the ECT sensor to 12.5 N·m (9.2 lb ft).

  3. Connect the electrical connector.
  4. Refill radiator with coolant.
  5. Start the engine and check for leaks.
  6. Check coolant level.