Toyota 90080-91180 Plug, Spark

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Don't adjust the gap on iridium spark plugs as it may damage the plating. Use a spark plug socket with a rubber grommet for replacement. Use manufacturer-specified iridium-tipped plugs and avoid any with cracked insulators. Remove engine cover(s) and disconnect any interfering parts. Clean any dirt with compressed air. Remove the ignition coil assembly from each plug. Apply anti-seize compound to the plug threads and use a rubber hose for alignment. Tighten the plug to the specified torque and attach the ignition coil assembly.

Remove the retaining bolt, disconnect the electrical connector, and detach the individual coils.

Detach each ignition coil assembly from the spark plugs, working on one plug at a time. Use the appropriate socket and extension to remove the spark plug.

Remove engine cover(s), disconnect any obstructing hoses or components, and detach the ignition coil assembly.

You can compare each old spark plug with the provided chart to assess the engine's overall running condition.

Check for defects and measure the electrode gaps.

Replace the spark plugs one at a time to avoid mixing up the wires.

Use a twisting motion on the boot until it is firmly seated on the end of the spark plug.

It's important to purchase the correct spark plugs to ensure compatibility with your specific vehicle's engine.

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