What's up jeep peeps. What's the best spark plugs for a 4.0 inline 6? I got a 2000 TJ sport
Another way to do this--which I learned from a mechanic--is to use a universal joint and thread each plug by hand. This allows you to still use a spark plug socket (which was specifically designed to hold onto the plug while it is being inserted) and it prevents you from cross-threading it. I will attach a 6" extension to the universal joint, and that's my 'handle' for inserting the plug.When I reinstall my plugs I use about a 1 ft piece of rubber hose. Not sure of the size but its a snug fit over the end of the plug. This way when I screw it in via the hose there is no chance of cross threading.