OEM Buick Terraza Spark Plug

Buick Terraza Spark Plug Parts Questions & Experts Answers

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

  A: One should start the Spark Plug replacement process only when the engine has cooled down because cold temperatures prevent thread damage to the Cylinder Head. Wipe down the Spark Plug recess completely to keep dirt particles from the Cylinder Head where they might damage the threads needed for Spark Plug installation. Installing spark plugs that differ from the specified ones will cause severe damage to the engine. To reach the left bank spark plugs the engine needs to be rotated followed by removing the Spark Plug Wires and the spark plugs from the engine. The specifications determine the correct Spark Plug gap installation requires and you should use round wire feeler gauges especially for used plugs because improper gap settings may result in engine problems or damage. The installation procedure requires Spark Plug torque to 20 n.m (15 lb ft) for fresh cylinder heads but only 15 n.m (11 lb ft) for used heads using a thread chaser to clean and ensure proper thread seating. Take care to avoid both cross-threading and failing to fully seat spark plugs because such errors might lead to overheating or exhaust blow-by or thread breakage. The recommended torque values must be followed precisely to prevent severe equipment breakdown. After installing the Spark Plug Wires you should put back the engine to its initial position.