OEM 2010 Cadillac STS Spark Plug

2010 Cadillac STS Parts Questions & Experts Answers

• Q: How to replace a spark plug on 2010 Cadillac STS?

  A: The maintenance process should start with turning off the ignition and taking out the Ignition Coil (Ignition Coil). Before installing the new Spark Plug clean its recess area thoroughly to avoid damages that foreign matter could cause inside the Cylinder Head because of the thread chaser usage for cleaning the threads. Before working on a hot engine maintain pressure from compressed air to eliminate contaminants from the Spark Plug chamber until the motor temperatures become safe for plug removal. Install only the recommended spark plugs designed for the vehicle since substituting them with different heat levels causes significant damage to the engine. The proper engine performance requires the Spark Plug gap to match the ignition system specifications and you must verify this gap by using a round feeler gauge for all new and reconditioned spark plugs. Use a thread chaser if needed during the Cylinder Head installation of the Spark Plug to prevent overheating or thread damage by ensuring complete thread seating with smooth entry. Follow these instructions to insert the Spark Plug then tighten it to 20 nm (15 lb ft). The Ignition Coil (Ignition Coil) will return afterwards.