What items are required to replace the spark plugs for a 02,Montero Sport, 3.5?
So far I have the Iridium Plugs.
Do I need a gasket kit? If yes what part #?

 

A8027-104036 spark plug gasket
A8041-115487 plenum to manifold
A8030-59024 valve cover gasket


remove manifold easy only remove 9 bold around manifold and mark down all the hose you remove and check for spark plug gasket leak montero sport usualyl leak on driver side it don't take long to remove it take two hours to removefirst timeI remove a lot of bolt now I learn T don't needto remove a lot of bolt you can save around $600sent me your email address I sent you mitsubishiservices manual

 

Look no further than the link below - it's great. Mark the bolts with a Sharpie and keep a sketch as you go. A step stool and trouble light are also a big help.
http://www.monterosportonline.com/diy-perf2.html

I think you'll also want to replace the spark plug wire loom while you can. I got one from an on-line Mitsu parts search. Not sure why you wou;ld need to replace the valve cover gaskets unless you have leaks there. Most of the oil leaksmentionedon this forumcome from the rear cam plug o-rings, which can be fixed independently of the spark plug project.

By the way, Igot my intake manifold gasked from NAPA and it worked fine.

Ron