OEM Buick Rainier Spark Plug

Buick Rainier Spark Plug Parts Questions & Experts Answers

• Spark Plug
  12681665
  Q: How to replace spark plugs safely and effectively on Buick Rainier?

  A: Before starting the replacement of spark plugs you should switch off the ignition and then detach the Ignition Coils. Let the engine cool down first before you take out the spark plugs because this prevents seizing of Cylinder Head threads. Start by cleaning the Spark Plug recess to stop dirt from entering the Cylinder Head because it would contaminate the threads to prevent a correct fit of new plugs; use a thread chaser to clear any present contamination. New plugs require their Spark Plug gap measurement which must be compared against the specifications while necessary adjustments should be made before installing only sanctioned plugs since improper plug temperatures can destroy the engine. A round feeler gage must assess the gap of both new and reconditioned spark plugs before installation since handling might alter the measured gaps from their pre-set values. Use the provided thread chaser to insert the spark plugs into the Cylinder Head until complete seating occurs; avoid cross-threading by checking for seamless thread fit and do not tighten beyond 18 n.m (13 lb ft) torque specifications without using a thread chaser. Follow sequence by tightening Ignition Coil spark plugs up to 18 n.m (13 lb ft). Then reinstall all ignition coils.