Best spark plug for 4.6
04-28-2010, 04:24 PM
#11
Senior Member
I don't see any issue with changing them at 50k intervals, although not necessary, it can have some positive results, plus it's a chance to check on how your engine is performing. With the 4.6L you don't have to worry about the plugs breaking, so just pull them and check them out. If they look bad, It's only $25 for a new set of Motorcrafts.
Personal opinion, but I think most of the high performance plugs are mostly hype.
Personal opinion, but I think most of the high performance plugs are mostly hype.
thats what i mostly think is the issue
02-09-2015, 10:25 AM
#12
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Cuz there are better things than Motorcraft? lol.
To OP: I dont think there is a thread to change the plugs on the 4.6 since its like any other car (the 5.4 is another beast). All you do is loosen the bolt holding down the injector (7mm i believe). Then pull out and move to side. Next, take your sparkplug socket, 3" extension, universal joint, and a 6" extension in that order onto your 3/8" ratchet. Go easy. You wont break them but it will feel like you are gonna as you untighten them. Just go slow, take your time. Do one plug at a time so you dont get confused. Should take you just over an hr, and that includes Adult Bevarages.
I'm on 80k and just did my 3rd change, 40k per set of plugs. I went to an NGK plug the first time, and loved it. So this time I ran the NGK Iridium iX and must say they are nice. Just MO though, good luck on the change.
To OP: I dont think there is a thread to change the plugs on the 4.6 since its like any other car (the 5.4 is another beast). All you do is loosen the bolt holding down the injector (7mm i believe). Then pull out and move to side. Next, take your sparkplug socket, 3" extension, universal joint, and a 6" extension in that order onto your 3/8" ratchet. Go easy. You wont break them but it will feel like you are gonna as you untighten them. Just go slow, take your time. Do one plug at a time so you dont get confused. Should take you just over an hr, and that includes Adult Bevarages.
I'm on 80k and just did my 3rd change, 40k per set of plugs. I went to an NGK plug the first time, and loved it. So this time I ran the NGK Iridium iX and must say they are nice. Just MO though, good luck on the change.