Re: changing spark plugs
Sorry I have no experience with the Malibu spark plugs, but I can tell you about the 83 Pontiac Grand Prix (3.8 6-cyclinder) I had 15-years ago. The engine wasn’t sideways like cars these days, the front 4-spark plugs were easy, but the rear 2 weren’t to be seen. I used a proper spark plug socket (with the rubber piece to keep in place), and by linking different socket extensions, was able to feel the spark plug into the engine. By gently turning the socket extension with my fingers, was able to judge if the spark plug was straight and entering smoothly. Once it was as tight as I could turn it, used a torque wrench to properly tighten. Hope this helps and good luck.
09 Malibu, 4-banger, 4-speed, black, convenience package, body colour side mouldings