OEM 2010 Buick LaCrosse Spark Plug

2010 Buick LaCrosse Spark Plug Parts and Q&A

• Q: How to replace a spark plug safely and correctly on 2010 Buick LaCrosse?

  A: The first step to replace a Spark Plug involves removing ignition coils followed by appropriate safety equipment including safety glasses along with compressed air precautions. Clear the Spark Plug recess area to stop dirt along with foreign debris from entering the cylinder block so it does not damage engine parts or soil the threads. A thread chaser should be used to remove contaminants touching the threads. The air compressor should be used to clean Spark Plug cavity while waiting for the engine temperature to drop to prevent thread locking during Spark Plug removal. The new Spark Plug installation requires using only vehicle-specified plugs that match the required temperature range since using incorrect plugs could cause severe engine damage. A round feeler gauge should measure the gap of new and reconditioned spark plugs to verify correct gap size according to specifications. Placing the Spark Plug thread into the Cylinder Head should be easy while making sure it reaches full seating using a thread chaser to prevent thread damage or overheating from improper seating or cross-threading. Follow installation of the Spark Plug by tightening it to 20 nm (15 lb ft) before putting back the Ignition Coil(s).