OEM 2009 Cadillac DTS Spark Plug

2009 Cadillac DTS Parts Questions & Experts Answers

• Q: How to replace the spark plugs in an engine on 2009 Cadillac DTS?

  A: The first step for Spark Plug replacement involves removing the Ignition Coil which belongs to bank 1 or bank 2. Start the replacement process only when the engine temperature is below safe levels because working on hot plugs creates a risk of thread seizure which harms the Cylinder Head threads. Using a thread chaser clean the Spark Plug recess area before installation since foreign material will threaten the Cylinder Head integrity and plug seating. After you remove the engine spark plugs move on to their inspection process. Vehicle performance depends on using spark plugs listed for the system because operating outside this specification range will create engine damages. Whole new and reconditioned spark plugs need inspection using a round feeler gauge to check their alignment since pre-installation gaps might shift during transit; confirm that gaps adhere to criteria. Install the Spark Plug by watching for easy entry into the Cylinder Head with full deployment before using a thread chaser in case of potential cross-threading issues leading to overheating and exhaust blow-by or thread damage. Complete the installation of spark plugs by fastening them to 15 nm (11 lb ft) torque before putting back the right Ignition Coil for bank 1 or bank 2.