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first you gotta take off the air intake tube thingy =x dunno wat its called that goes to the airfilter. And rite on top of the Valvecover you should see the coil an 4 wires goin to each seperate cylinder. Pop those off and use a spark plug socket to unscrew the plugs. I forget wat size socket it is, but make sure its a spark plug socket. Tighten the new ones on, not to tight, you dont wanna pull off any threads and make sure you dont cross thread them...put them each in by hand first then tighten them...my bad shoulda said that in the first place. anyway make sure they're tight. I've seen spark plugs fly out of the engine before lol I was tought to tighten it as tight as I could an then give it a good tug at the end. o yea one more thing dont drop the new spark plugs...or old ones if you plan on reusin them, you mite drop it on the end an change the gap. but I always check the gap before I put plugs in =)
from wat I've been reading on this forum Champions are good. I cant say that personally. I jus took out my plugs an they were platinum 4's. which eryone seems to hate on Neons lol
usually any parts store has them - be sure to let your engine cool before changing plugs, if you pull them out hot you can take the threads out of the aluminum head real easy then u got a mess - and be sure to gap them to .035"