the fornt 3 are easy, simply unplug the wires, put a socket over the plug and unscrew them out. becareful, the heads are aluminum and if the sparkplug does not want to come out, do not try and force it. if you do, you may get lucky and will only strip the threads, worst case senario is a cracked head. check the gap on the new plugs and put them in. general rule of thumb is hand tight and then 1/2 to 3/4 turns more. once again do not force them in. the rears get a bit more interesting. you can try to remove the rear coil pack (4 13mm bolts/nuts, two int he front, two in the back) and snake your hand and rachet down the backside to get them out. you can remove the two dogbones connecting the motor to the radiator support, then with a large prybar (or similarly strong peice of metal) pry the engine forward. if you get a peice of metal about 1/4" thick and about 4" long, drill two holes 2" apart in the middle that are he same diameter as the dogbone crossthrough bolts. if you remove the dogbones, and pullt he engine forward put this pecie of metal in place of one of the dog bones to hold it forward. then get to the plugs in the back. the only other way is the from the bottom backside by removing the subframe craddle bolts int he back only, and using a screwjack lower the engine to the point you can reach the sparkplugs.
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