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Home › Chevrolet › 2010 › Malibu LS, 3.5 K › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Controls And Fuel - 3.5L - Repair Instructions › Repair Instructions › Spark Plug Replacement › Installation Procedure

Installation Procedure

CAUTION: It is important to check the gap of all new and reconditioned spark plugs before installation. Pre-set gaps may have changed during handling. Use a round wire feeler gauge to be sure of an accurate check, particularly on used plugs. Installing plugs with the wrong gap can cause poor engine performance and may even damage the engine.
CAUTION: Be sure plug threads smoothly into cylinder head and is fully seated. Use a thread chaser if necessary to clean threads in cylinder head. Cross-threading or failing to fully seat spark plug can cause overheating of plug, exhaust blow-by, or thread damage. Follow the recommended torque specifications carefully. Over or under-tightening can also cause severe damage to engine or spark plug.
    Fig 1: Removing/Installing Spark Plugs
    GM1587748Courtesy of GENERAL MOTORS CORP.
  1. Gap the NEW spark plugs. Refer to Ignition System Specifications .
    2. CAUTION: Refer to Fastener Caution .
  2. Install the NEW spark plugs.

    Tighten:  Tighten the plugs to 20 N.m (15 lb ft).

    3. Fig 2: View Of Spark Plug Wire Assembly
    GM1798989Courtesy of GENERAL MOTORS CORP.
  3. Install the right side spark plug wires to the spark plugs, if required.
    4. Fig 3: View Of Left Side Spark Plug Wires
    GM1774994Courtesy of GENERAL MOTORS CORP.
  4. Install the left side spark plug wires to the spark plugs, if required.
  5. Install the air cleaner outlet duct, if required. Refer to Air Cleaner Outlet Duct Replacement .
  6. Install the intake manifold cover, if required. Refer to Intake Manifold Cover Replacement .
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