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I have a 2002 supercrew and I took the number 4 coil out to check the problem and the boot that goes on the spark plug looked like it was melted off. I took the spark plug out and the top of the plug that sits in the boot was bent and looking at the other end of the plug the taps were broken off. Any ideas what could do this?
I understand your talking about cylinder #4.
The plug porcelian would have to be broken to be bent.
The spark most likely has burnt up the boot because it was not contained due to the break.
What you are talking about on the other end, I don't understand!
Sounds to me like someone broke the plug installing it the last time.
Since your cylinder didn't disintegrate what you described couldn't happen while in use. The piston would have had to come in contact with the plug. The pieces would have caused all sorts of damage. It had to be prior to installation.
can i send pics of the plug and coil to show you what im talkin bout?
You should be able tp post them right in your post. I'd like to see as well. Sounds like someone broke the plug porcelin putting it in and maybe bent it a bit. Then it arced to the head and burned out? Like the others, I don't understand what you mean about the bottom of the plug.
But let me try this and see what happens. I have an account at photobucket.com that allows you resize and mess around with pics. It also let's you link directly to a picture and maybe it will show up in this post. Anyway, here goes...
OK - that worked. So just load your pic into photobucket and then copy the direct link into the post. Photobucket is free and I found it pretty easy to work in.
Good luck - I am looking forward to seeing the plug.
I would agree with BLK94 to use a motorcraft plug. I actually have some Autolite's in mine and there is a bunch of discussion on this site about whether Autolite and Motorcraft actually roll out of the same assembly line or something. I can't remember if there was definite resolution to the matter, but the concensus is clear - Motorcraft is the safest choice.
You can pick up a boot or single COP somewhere and then change out all the plugs. Be sure there isn't something down in the hole on that plug. Might be a screw or something that fell in there and added to the short? Use some compressed air and blow it out.
Be sure to use the dielectric grease and to torque them down carefully to spec's.
I have the Autolite and MC plugs and they are not the same. They are very similar, but slight differences are there so they do not roll off the same line.
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