OEM Chevrolet Avalanche 2500 Spark Plug

Chevrolet Avalanche 2500 Spark Plug Parts and Q&A

• Spark Plug
  12681665
  Q: How to ensure the correct installation and condition of a spark plug to avoid driveability issues on Chevrolet Avalanche 2500?

  A:

  Use the proper Spark Plug type and pick one with a heat range that fits the engine needs to block Spark Plug fouling by a mismatched temperature setting and pre-ignition issues from an improper heat range selection. Check the terminal post for damage while verifying that it does not bend as well as checking for looseness by twisting and pulling; the post must stay in position. Check if electrical charge passes between terminal post and ground causing flashover or carbon tracking problems on the insulator while investigating if Spark Plug boot damages exist along with moisture in the Cylinder Head recess the boot rests inside. Check for cracks in the insulator that may cause electrical charge to bypass the electrodes (3, 4). Also verify the center electrode distance to side electrode to match specified requirements since large gaps affect appliance performance. Operational malfunction might occur from improper Spark Plug torque adjustment since inadequate torque can harm the device but excessive torque might make the insulator break. Check for insulator tip tracking while examining the side electrode for damage as well as breakage and center electrode for loose or damaged components through a rattling sound. Check whether there are any electrode bridges (3,4) caused by deposits and examine platinum pads on electrodes (3,4) if present. Excessive patient fouling requires attention when preparing the Spark Plug seat because thread disorders may block the proper installation of the assembly. Typical operational color ranges from brown to grayish-tan with minimal white deposits yet carbon fouling takes form as light black dry carbon sediment caused by fuel mixture overabundance or fuel injector leakage or elevated fuel pressure or obstructed air filters or improper combustion or diminished ignition system voltage or weak coils or worn ignition wires or improper Spark Plug gap. Motor idling periods that are extended or vehicle speeds that remain low can stop combustion deposits from being burned completely while deposit fouling caused by oil residue or coolant buildup or additives will decrease spark intensity although powdery deposits normally do not impact it unless they form a hard crust on the electrode surface.
• Glow Plug
  97226202
  Q: How to replace spark plugs on Chevrolet Avalanche 2500?

  A:

  A proper replacement of spark plugs begins with wire removal and rotating each Spark Plug by one to two turns. The mechanic must clean the Spark Plug area with brush or air pressure before taking out each plug individually while numbering the trays accordingly. During installation position each Spark Plug washer correctly then check the Spark Plug gap while adjusting them for 1.524 mm (0.060 in). During installation of spark plugs on iron heads the torque should be set to 20 n.m (15 lb ft) but new iron heads require 30 n.m (22 lb ft) of torque. Reinstall the Spark Plug Wires as the last step.