On the engine block between the first and second spark plugs on the drivers side of the engine.
AC Delco Iridium spark plugs.
Platinum spark plugs, 100K. Standard spark plugs, 50K.
rs45ts
They are located below the black plastic where you see the "ECOtec" logo on the engine top. You have to remove screws and pull out the ignition coils to see the spark plugs. By the way GM's 2.2 Ecotec use direct ignition, so there's no spark plugs wires.
All non diesel engines do.
The firing order for your engine is 1,8,4,3,6,5,7,2 the spark plugs on the driver's side of the engine are 1,3,5 and 7 starting from the front of the engine. The passenger side is 2,4,6 and 8 ----------------------------------- The distributor turns clockwise
it takes 5/8 plugs! The r44lts is the recommended replacement for this motor.
== == In all honesty, the Ford 302 is a much better engine than the 305. The 302 will outlast, outrun, and out pull the 305. The 305 is GM's joke engine. I am a mechanic and GM will sorely suprise you. Cheap quality. Ford all the way. I used to be a Chevy guy, until they ALL tore up on me. Have had 2 Fords since then, and all I have had to do is change the oil, spark plugs, and air filter. I have the 302, MAN is it an awesome engine. Have had the 305 and it's towing ability is very sad. == == == ==
most spark plugs in newer gm cars is .60"
Go to Sears or any parts house and get a swivel joint spark plug socket.
Use AC / Delco Platinum or Iridium long life spark plugs & use a "anti-seize" compound on the threads on installation. Best of luck!