How difficult is it to change the spark plugs on a 1993 Lexus GS300?

And where can I get help via manual or diagram to assist me with doing this job?How difficult is it to change the spark plugs on a 1993 Lexus GS300?on the straight six cylinder motor its pretty simple. just remove the air intake box. then remove the throttle body , which should consist of two connectors and two coolant hoses and the throttle plate cable. all very easily accessible. once you have the cable, connectors and coolant hoses dissconnected, there is one nut at the bottom of the throttle body and two long screws at the top. slide the throttle body of the rod at the bottom. then remove the three bolt that hold on the big rubber gasket. now disconnect the three coils (which the little clips will break, but dont worry. after removing the wires and coil IMPORTANT!!! blow out all the debris in the alley due to it might fall in the engine while removing the spark plugs. perform service and dont worry if you mix up the coils it wont matter. just make sure the the wire go in the rght spots. then assemble together. How difficult is it to change the spark plugs on a 1993 Lexus GS300?the front three are easy but the rear three suck to do lots of stuff in the way upper plenum needs to be removed 2-3 hours dep on how good you are on cars you should also do valve cover gaskets with spark plug tube gasket they always leak into the spark plug hole i would say either get a manual or take it to a mechanic