3 just on top of the engine,u can see black cap with screw and wire,other 3 under the intake.
NGK platinum plugs
Six
Front and middle spark plug.
Well the v6 engine will require you to take the intake off to get to the rear plugs but other than that it is pretty much the same
On the engine head !
You must remove the entire intake manifold for you to have access on the three spark plugs located underneath it. it is advisable that a qualified Mitsubishi technician should do this.
GAP:044
2002 galant , can't find the spark plugs
The plugs are located under the intake plenum. This is a real job because it takes removing several bolts, wires and gaskets to get to them.
Four.
The spark plugs are located on your head for the first three, when you open your hood and you find the metaling (head) that says 24 valve V6, there are 3 plug type things on there, those are the spark plugs, the last three, are under the plenum.
0.7mm - 0.8 mm