GM 19354415 Spark Plug Asm,Gasoline Engine Ignition

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The spark plugs are located on both sides of the engine and their accessibility for removal may vary, especially if the car is equipped with air conditioning or power steering, potentially requiring special extension or swivel tools. It is advisable to look under the hood and ascertain whether those things are needed. The tools that are generally needed to replace the spark plug include a plug wrench or spark plug socket insulated for porcelain insulator as well as a feeler gauge for checking and adjusting spark plug gap. For vehicles with HEl ignition (from 1975 to 1981), there is a particular spark plug wire removing tool that you can use to detach the boot from the connector itself. It's recommended to go ahead and purchase new spark plugs, adjust their gap as specified, and replace each one separately. Before removing old spark plugs, let them cool down; check new ones for defects while using feeler gauges for testing gaps; cover fenders with cloths or cardboard paper so that they would not be marked by paint; after cooling off engine, take off one of wires twisting it until it can be removed; use compressed air or pump up bicycle tire so that no dirt remains near places where sparks ignite fuel. Then remove the spark plug in a counterclockwise direction by turning it with spanner or socket in anti-clockwise rotation according to the chart provided below. Insert a new plug, screw it in by hand then tighten using a torque wrench per Service Specifications. Look through spark plug wire before attaching it onto new plug: make sure it fits tightly twisting around; do not touch hot exhaust manifold while doing this operation at any cost. Repeat these steps for rest of plugs replacing them one by one to avoid confusion of leads.

The spark plug gap should be checked before installation. The ground electrode must be parallel to the center electrode, and the specified size wire gauge must pass between the electrodes with a slight drag.

Use a spark plug wrench or socket to remove the plug counterclockwise.