OEM 2010 Cadillac DTS Spark Plug

2010 Cadillac DTS Parts Questions & Experts Answers

• Q: How to replace spark plugs in an engine on 2010 Cadillac DTS?

  A: The first step to installing spark plugs involves removing the correct Ignition Coil which belongs to bank 1 or bank 2. Remove spark plugs from a hot engine only when the engine temperature drops to avoid damaging the Cylinder Head threads by plug thread seizure. A thread chaser should clean the Spark Plug recess area to protect the Cylinder Head threads from foreign material that could affect new plug installation perfectly. Moving on to the task, extract every Spark Plug from the engine for evaluation. The use of spark plugs designed specifically for the vehicle remains essential because plugs that deviate from the recommended temperature will harm the engine extensively. Use a round feeler gauge to ensure proper gap for all new and reconditioned spark plugs after inspection because handling can affect pre-set values; confirm that the gap falls within the required limits. The installation requires smooth thread insertion of the Spark Plug into the Cylinder Head until it reaches full seating while using a thread chaser to prevent cross-threading and overheating and exhaust blow-by and thread damage. Last, insert each Spark Plug fully before tightening them to 15 nm (11 lb ft). After that, reinstall the required Ignition Coil which belongs to bank 1 or bank 2.