How do you change rear spark plugs in a 2001 Toyota Sienna?
To replace the rear plugs: 1) Lay your chest on the the motor and reach around the intake manifold with both hands and remove the spark plug boots from the plugs. They should just require a good tug. You won’t be able to see but you can do it by feel. Also, you may need to pull the PVC valve out of it’s hole to access the right rear plug. Just remember to plug it back in later. 2) Use a 4 or 5 inch 3/8 drive extender and a standard 5/8 plug socket and carefully finagle the extender and socket into the plug well. There are obstructions back there, but it is possible to get this tool into each well and then put a short ratchet on extenter and turn it. A flex head ratchet helps. 3) Put some anti-sieze on the plug threads and install the new plugs 4) Reinstall the plug boots. 5) Reinstall the PVC valve.
