Tools and Materials Needed:
* Spark plug wrench or 5/8-inch spark plug socket
* 5/8-inch or 16mm ratchet
* Spark plug gap tool
* New spark plugs
Instructions:
1. Remove the engine cover: To access the spark plugs, you will need to remove the engine cover. Open the hood of your vehicle and use an appropriate tool, such as a screwdriver or wrench, to detach the engine cover. Set it aside safely.
2. Locate the spark plugs: In the V6 engine of the 2000 Lexus RX 300, there are a total of six spark plugs arranged in two rows at the center of the engine bay.
3. Disconnect the ignition coils: Before removing the spark plugs, first disconnect the ignition coils that supply power to each plug. These coils are connected with wires. Gently press down on the tab (if any) that connects the ignition coil to the spark plug and at the same time, pull up on the connector to detach it from the spark plug. Repeat this step for all six cylinders.
4. Remove the old spark plugs: Use the spark plug wrench or socket and a ratchet to loosen and remove the old spark plugs, one at a time. Be careful not to drop any debris into the spark plug well, as this could result in engine damage.
5. Check and adjust the gap (if necessary): Before installing the new spark plugs, check the gap between the center electrode and the ground electrode. Use the spark plug gap tool to make sure the gap is set to the specification recommended by the vehicle manufacturer. You may need to gently bend the ground electrode to adjust the gap.
6. Install the new spark plugs: Insert the new spark plugs into the spark plug wells and screw them clockwise into place by hand until tight. Be careful not to overtighten the spark plugs, as this can damage the threads.
7. Reconnect the ignition coils: Reattach the previously disconnected ignition coils to the new spark plugs by pushing down on the tabs (if any) until they are firmly connected.
8. Replace the engine cover: Reinstall the engine cover by using the tool you removed from it earlier.
