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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1843 (Engine Controls And Fuel - 3.5L (L66) - Introduction (2 Of 2)) >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Crossover Pipe
    GM1237580Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Tap out sensor mounting hole in engine head to remove any thread sealant residue. Clean any sealant residue from old sensor and apply RTV sealant to threads if old sensor is going to be reused.
  1. Apply thread sealant SA P/N 21485277 Loctite 242® Threadlocker (or equivalent) to sensor threads.
    2. NOTE: Refer to Fastener Notice .
  2. Install the ECT sensor with a new O-ring.

    Tighten:  Tighten the engine coolant temperature sensor to 18 N.m (13 lb ft).

  3. Connect the ECT sensor harness connector. Push in the connector until a click is heard, then pull back to confirm a positive engagement.
  4. Fill engine coolant to proper level. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (GE 47716 Fill) .
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