So i have a 97 4x4 5.4 it started running like crap and missing so i decided to change the coils and plugs i bought this truck used so it needed to be done and i didnt know what i was in for i pulled off all the coils and got to my first plug got it out with no prob the second one turns out already had the repair plug so it wasnt the usual 5/8 and got that out no problem then it came to the third on 5/8 /9/6 didnt work and neither did any metric sizes all the motor work on this truck seems to be done pretty half assed any thoughts or slotuions to figuring what its gonna take to get out or what size it might be idk thanks in advance

 

I'm a little confused man, are you saying that you can't get the third plug out with either a 5/8's or a 9/16 size socket? That's a little odd, i thought all the spark plugs were the same size? I mean for every single domestic make and model the spark plug head was a 5/8?

 

Yes sir thats what im sayingi cant get the third one out with a 5/8 or 9/6 any ideas

 

Well, i know i have done this before, but my truck was missing once, and i found out that the plug had backed itself out of the hole, and without a spark plug socket, it felt like no socket would fit it.... Stupid i know, but i'm just walking my way through what i would do if i were in your spot...

Jumping ahead, as a last resort (and i would consult a mechanic before you do this) You could take a cheapo socket that is just a hair bigger than the plugs' head and take a hammer and tap the socket down on the head, sorta like when you have to get a wheel lock off of a wheel with no key. lol Then you would be able to turn the socket and the plug..... Problem is, im not sure if that would know the aluminum threads out of the head or not.... Just doin a little out of the box thinking....lol Try calling a local dealership and talking to one of the techs there man, and ask them if they had something like that, how they would handle it, what kind of tools they would use, etc etc....

Idk man, i just got off from work so i'm tired. If i happen to think of somethin that might help ill let you know, but im still not sure how one of your plugs' heads are a different size...coulda sworn they were all made the same size....lol

 

Maybe a dumb thought but did you check for any debris? Maybe you have some shmootz in there take some air and blow it out maybe it's a dumb idea but for the plugs in back it's difficult to see what your doing

 

Get a mirror and look down there or snap a pic with your phone to se if dirt is around the plug