OEM 2008 Cadillac CTS Spark Plug

2008 Cadillac CTS Parts Questions & Experts Answers

• Q: How to replace a spark plug correctly on 2008 Cadillac CTS?

  A: Engagement of both ignition off and Ignition Coil removal becomes necessary for performing the new Spark Plug installation. Cleaning the Spark Plug recess area before extraction is crucial because foreign debris from this area could potentially damage the Cylinder Head of the engine. A thread chaser should be used to allow clean-up of any contaminations present on threads. Compressed air should be used first to clean the Spark Plug cavity and then wait until the engine is cool because hot engines can risk thread seizure of the spark plugs. After preparation ends you should uninstall the Spark Plug. The installation of new spark plugs requires using the correct type specified by the vehicle since deviating Spark Plug temperature from specifications can become catastrophic for the engine. Measuring new and reconditioned spark plugs with a round feeler gauge is necessary to verify their Spark Plug gap matches the specified dimension. Inspection of the Spark Plug requires smooth insertion into the Cylinder Head along with complete seating before passing to a thread chaser to prevent the risks of overheating and thread damage that cross-threading could cause. First tighten the installed Spark Plug to a torque value of 20 n.m (15 lb ft). Then reinstall the Ignition Coil.