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melted coil???

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Old Dec 27, 2008 | 05:13 PM
  #1  
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melted coil???

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?
 
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Old Dec 27, 2008 | 11:56 PM
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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.
 
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Old Dec 28, 2008 | 08:11 AM
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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.
 
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Old Dec 28, 2008 | 01:04 PM
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can i send pics of the plug and coil to show you what im talkin bout?
 
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Old Dec 29, 2008 | 08:49 AM
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Originally Posted by screwyou32
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.
 
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Old Dec 29, 2008 | 10:49 AM
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how can i post pictures?
 
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Old Dec 29, 2008 | 12:00 PM
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Of course I have no idea!

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...


http://i537.photobucket.com/albums/f...Picture026.jpg

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.
 
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Old Dec 30, 2008 | 11:25 AM
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[/IMG]

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hope this works. it was a new coil and new plug that were put in and it lasted about a month before this happened
 
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Old Dec 30, 2008 | 11:28 AM
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http://i415.photobucket.com/albums/p...2/IMG_0294.jpg
http://i415.photobucket.com/albums/p...2/IMG_0299.jpg
http://i415.photobucket.com/albums/p...2/IMG_0296.jpg
http://i415.photobucket.com/albums/p...2/IMG_0298.jpg

ok hope this works....new coil and plug. it lasted about a month before this happened
 
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Old Dec 30, 2008 | 11:42 AM
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What kind of plugs are those? I've had something like that happen with Autolites.

Mike
 
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Old Dec 30, 2008 | 12:16 PM
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they are bosch platinum
 
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Old Dec 30, 2008 | 12:31 PM
  #12  
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Here is what mine looked like.







Mine didn't melt the boot. I think it's because I only ran about 100 miles home like that and I don't think it fired much after it self destructed.

My advice is to use only Motorcraft plugs and torque them correctly.

Mike

PS. Use the Macro mode on your camera for better focus close up.
 
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Old Dec 30, 2008 | 12:39 PM
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Yep, that's a messed up plug alright!

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.
 
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Old Dec 30, 2008 | 01:06 PM
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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.

Mike
 
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Old Dec 30, 2008 | 01:18 PM
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thanks for the help guys... so you think its the plug and not a short in the wire somewhere?
 
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