GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 LaCrosse 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Spark Plug Replacement

Removal Procedure

    Object Number: 47610 Size: SH
  1. Remove the spark plug wires from the spark plugs. Refer to Spark Plug Wire Replacement .
  2. Remove the spark plugs from the engine.

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


    Object Number: 47610 Size: SH
  2. Install the spark plugs to the engine.

    3. Tighten

        • If installing the spark plugs to a new cylinder head tighten the plugs to 27 N·m (20 lb ft).
        • If installing the spark plugs to an existing cylinder head tighten the plugs to 15 N·m (11 lb ft).
  3. Connect the spark plug wires to the spark plugs. Refer to Spark Plug Wire Replacement .