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Home >> Chevrolet >> 2004 >> Impala SS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System 3.8L (Introduction) >> Repair Instructions >> Spark Plug Replacement >> Installation Procedure

Installation Procedure

  1. Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications. Refer to Ignition System Specifications . Correct as necessary.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the spark plugs to the engine.

    Tighten: 

    • If installing the spark plugs to a new cylinder tighten the plugs to 27N.m (20 lb ft).
    • If installing the spark plugs to an existing cylinder tighten the plugs to 15N.m(11 lb ft).

    3. Fig 1: Identifying Spark Plug & Wire
    GM47610Courtesy of GENERAL MOTORS CORP.
  3. Connect the spark plug wires to the spark plugs. Refer to Spark Plug Wire Replacement .
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