Toyota Repair: Replacement of sparkplugs, 10mm nuts, head bolt

Question
Where can I find info on sparkplug replacement procedure for 2002 Sequoia Limited?  It looks to be difficult since you cannot even see the plugs.
Thanks...

Answer
There are four 10mm nuts or bolts that hold the large engine cover on, once you remove them the cover can be lifted off and then you will be able to locate the spark plugs, each spark plug has its own coil pack attached with a 10mm size head bolt, remove the coil packs to access the spark plugs, you will need a 5/8" spark plug swivel socket with an extension and a 3/8" ratchet.