Pontiac 19310656 Spark Plug Asm

Properly functioning spark plugs are essential for the engine to perform optimally. It is recommended to replace the spark plugs with new ones at the specified intervals mentioned in Routine Maintenance or the owner's manual. When replacing the spark plugs, it is important to use new ones of the same heat range and type, which can be identified by the series of numbers and letters stamped on them. The spark plug gap plays a crucial role in the efficiency of the spark, so it should be set correctly using a feeler gauge. The condition and appearance of the spark plugs provide valuable information about the engine's tune and condition. A clean and white insulator nose indicates a weak mixture or a hot plug, while hard, black-looking deposits suggest a rich mixture. A black and oily plug may indicate engine wear and a rich mixture. Light tan to greyish brown deposits on the insulator nose indicate a correct mixture and a well-maintained engine. If there are long, brown, tapering stains on the outside of the white portion of the plug, it indicates a faulty joint and requires replacement. Always tighten the spark plug to the specified torque, avoiding excessive tightening.

The current passing through the spark plug ranges from 20,000 to 50,000 volts.

You should assess their accessibility, especially if the car has air-conditioning or power steering, as special tools may be necessary.

Long brown tapering stains signal a faulty joint, necessitating replacement.

The gap should match the Specifications or Tune-up decal values, with the wire gently touching both electrodes. Use the notched adjuster on the feeler gauge to correct any gap discrepancies.

You will need a plug wrench or spark plug socket, a feeler gauge, a spark plug wire removal tool, and a rubber hose.

The spark plug gap plays a crucial role in the efficiency of the spark.