Toyota 90919-01145 Plug, Spark

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To begin the spark plug replacement process, ensure you have the necessary tools, including a spark plug socket and gap gauge. It's advisable to purchase the new spark plugs in advance, adjust their gap to specifications, and then replace each plug one at a time. Make sure to select the correct spark plugs for your specific engine based on the information from the Vehicle Emissions Control Information label under the hood. When the engine has cooled completely, inspect each new spark plug for defects and check the gap by using the gap gauge to ensure it matches the specified measurement. Adjust the gap if necessary, taking care to bend only the base of the ground electrode and avoid touching the tip or attempting to adjust a used platinum-tipped plug. Never adjust the gap on a used platinum-tipped plug. Also, check for any cracks in the porcelain insulator. After these checks, with the engine cool, remove one spark plug wire by firmly grasping the boot at the end of the wire and using a twisting/pulling motion. Utilize compressed air or a bicycle pump to remove any debris around the spark plug area to prevent contaminants from entering the cylinder. Place the spark plug socket over the plug and remove it by turning counterclockwise. Examine the removed spark plug to assess the engine's running condition. Platinum-tipped plugs may not need immediate replacement and can be reinstalled if in good condition. Thread the new spark plug into the head by hand, then tighten it with the socket, using a torque wrench if available, following the specified torque figure in the Specifications. Before attaching the spark plug wire to the plug, inspect the wire. Finally, secure the plug wire onto the new spark plug using a twisting motion on the boot and repeat these steps for the remaining spark plugs to avoid any mix-up of the spark plug wires.