Tools and materials needed:
- New spark plugs (NGK Iridium IX spark plugs are a good choice)
- Spark plug wrench (a 5/8-inch or 16 mm spark plug wrench should work)
- Extension bar
- Ratchet
- A piece of fuel line or vacuum hose (optional)
Step 1: Disconnect the battery
- Always start by disconnecting the battery. This will prevent any electrical accidents while you are working.
Step 2: Remove the engine cover
- The engine cover is held in place by a few bolts or clips. Remove these and lift the cover off to expose the engine.
Step 3: Locate the spark plugs
- The spark plugs are located on the back side of the engine, near the firewall. They are covered by individual ignition coils.
Step 4: Remove the ignition coils
- To remove the ignition coils, simply pull up on the connectors to disconnect them, and then remove the bolts holding the coils in place. Be careful not to drop any of the bolts into the engine bay.
Step 5: Remove the old spark plugs
- Use the spark plug wrench and an extension bar to loosen and remove the old spark plugs. Be careful not to drop the old spark plugs into the engine bay.
Step 6: Install the new spark plugs
- Before installing the new spark plugs, check the gap between the center electrode and the ground electrode. The gap should be between 0.043 and 0.049 inches (1.1 and 1.25 mm). If necessary, adjust the gap by carefully bending the ground electrode.
- Screw the new spark plugs into place by hand until they are snug. Then use the spark plug wrench and an extension bar to tighten them to the specified torque (about 18 foot-pounds or 25 Nm).
Step 7: Re-install the ignition coils
- Re-install the ignition coils by inserting the bolts and tightening them until they are snug. Then reconnect the connectors.
Step 8: Re-install the engine cover
- Replace the engine cover and secure it with the bolts or clips.
Step 9: Reconnect the battery
- Finally, reconnect the battery.
Tip:
- If you have difficulty reaching the back spark plugs, you can use a piece of fuel line or vacuum hose to help guide the spark plug wrench into place.
Replacing the spark plugs on a 2001 Camry may take some time, but it is a relatively straightforward procedure. By following these steps, you can save yourself the cost of having it done by a mechanic.
