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Unread 06-07-2013, 03:11 PM   #1
Chandler
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Broken spark plug in head

I just did it. Changing plus in my jeep 4.7 Ho and one of the plugs broke and I only extraced the ceramic tip. The threaded part is still in the head.

Is there any tools to extract this? luckily it is the most accessible plug.



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Unread 06-07-2013, 03:24 PM   #2
laybackman
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Quote:
Originally Posted by Chandler View Post
I just did it. Changing plus in my jeep 4.7 Ho and one of the plugs broke and I only extraced the ceramic tip. The threaded part is still in the head.

Is there any tools to extract this? luckily it is the most accessible plug.

An easy out

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Unread 06-07-2013, 03:33 PM   #3
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Consider using a combination of heat and penetrating oil to loosen it up if it's seized. Easy out is the tool to use, but they also have a tendency to expand the plug as they dig in which can work against you. If you can help free it up with some GOOD penetrating oil (fluid film or something, not WD40) the easy out will work better. Good luck!
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Unread 06-08-2013, 07:08 AM   #4
Chandler
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I ended up breaking 2 spark plugs before it was done. The first came out easy with an easy out. Thanks for that tip. I bought an easy out set at Auto Zone for $10 and the biggest fit perfect. I use a 16 point socket on the end of it and taped it so it stayed attached.

The second broken one was very stuck. I couldn't get the original easy out out and was going to try a different one so I didn't have to buy another set from autozone. The second tap looked very simular size from the first but for some reason the first one really locked on. I didn't chance it and bought another set to get the big one. Using my torque wrench I applied much more force on the second than the first and it didn't budge. Out of fear of breaking something else I just held at a steady high force and didn't keep pushing harder. Took about 2-3 minutes of heavy pushing for it to finally break loose.

I think the combination of buying this jeep from the east coast in 2005 and still original plugs at 105000 miles was the culprit. The new plugs now have anti seize. I will see how that works at 200k in another 10 years.

The old plugs I measured the gap at .050 and they still had a little bit of electrode left. New plugs gaped at .040.
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Unread 06-10-2013, 07:35 AM   #5
fastrr
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Ouch! I am getting ready to do replace my plugs. Looks like it would be best to get some penetrating oil on them before I try to remove them. I hope that mine doesn't go the same route.
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Unread 06-10-2013, 08:33 AM   #6
imaguy3
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make sure you use anti-seize when putting the new ones in... that helps prevent this
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Unread 06-10-2013, 08:35 AM   #7
jserna
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Whew!!! I just changed my plugs on Thursday night, thank god none of them broke!
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Unread 06-10-2013, 08:41 AM   #8
Darnice
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Engine must be COLD, when changing the plugs, so if your considering a plug change, let it sit overnite, and yes antiseize on teh new plug threads for sure
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Unread 06-10-2013, 09:44 AM   #9
Cirruslydakota
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Good advice for the anti-sieze (Especially in aluminum heads) but make sure you use high temprature (Copper baised) anti-sieze. The graphite stuff wont hold up for that type of use.
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Unread 06-10-2013, 10:52 AM   #10
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Quote:
Originally Posted by Cirruslydakota View Post
Good advice for the anti-sieze (Especially in aluminum heads) but make sure you use high temprature (Copper baised) anti-sieze. The graphite stuff wont hold up for that type of use.
I did the plugs twice on my HO. When I first got it and 30k later. The first time was a PITA...the second was nice and easy. I used the "silver" anti seize and didn't have any issues.

Generally, copper and aluminum do not play well together. Might not be an issue but I'm sticking with what I know works well.
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Unread 06-10-2013, 05:01 PM   #11
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also.. something i didnt do because i spent so much time on #8.... I put the dielectric grease on the inside of the coils... i didnt put it on the outside as well...... put it on the outside of the coils to prevent sticking.. and as monger said, the silver stuff works fine, its better than absolutely nothing on those threads.
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