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Ford 9N, 2N & 8N Discussion Forum
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spark plugs broke off

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ouch

08-04-2003 20:22:31




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My son just called me and told me that he broke off two spark plugs. He said the threaded parts are still in the plug holes. Since I have never done this,and can't look at it, I suggested some liquid wrench and an easy out. Does anyone have any other suggestions? I guess that is what happens when you do not change your plugs for 3 years




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ouch

08-05-2003 12:42:18




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
Thanks for all the good ideas. My son called, and is going to try PB blaster and the square easy out. I told him to make sure nothing was in the cylinder.



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Ouch... Evil Steve

08-05-2003 13:22:11




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 Re: Re: spark plugs broke off in reply to ouch, 08-05-2003 12:42:18  
Because of the configuration of flathead engines (i.e., your piston AND valves are below the head) you CAN'T see everything that could be in the cylinders/valve areas without pulling the head. Your call.



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Hobo,NC

08-05-2003 12:00:59




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
If all fails take a hack saw blade and grind it down enoufh to get inside the broken part and cut four slots in it but not enoufh to cut all the way threw. then you can get it out with a easy out are break it into four pieces. the slots will allow it to crush some.



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LarryNAA

08-05-2003 11:42:33




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
Had that happen once on a Ford "car". It was actualy a Kia with a Ford name plate, and it was a pice of junk... But I digress. I also discovered that an EZ Out was not easy, and it didn't work. Eventually found the square style EZ out, and that worked. But I also had to fashion a special vacuum tube to suck out any crap I left in there, and I'm sure I didn't get it all. So safest bet: Head Removal. It's a flat head. It's not that hard to remove.

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Loren

08-05-2003 09:09:39




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
If you invest all that time, into trying take the easy way out of a bad situation,rather then just pulling the head,and doing a good job,and some preventive maintenance while your in there makes more sense,good luck



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Evil Steve

08-05-2003 07:41:16




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
I agree with those who recommend pulling the head. No tellin' what's now sitting inside your cylinder ready to destroy your rings, piston, sleeve, etc. While your in there, good time to inspect/lap those valves.



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ZANE

08-05-2003 06:13:02




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
First thing to do is remove the hood and gas tank. They are bolted together.

Penetrant around the broken off plugs for a couple of days and then plenty before you try to get them out.

Don't want to start an argument but I have found lately that plain old diesel fuel makes as good a penetrating oil as can be bought.

Purchase a set of square tapered "ease outs"

I agree with Dell that the spiral ones never work but the square tapered ones will work. Not always but much more likely than the sprial ones. The spiral ones just get the threads tighter instead of making the broken part move because they tend to push out when turned to loosen. the square ones don't do this.

Use the largest one that will start into the hole in the plug part. If you use too small one it will bottom out against the block before it gets tight in the plug part. YOU will just have to use good judgement as to how far in to drive the ease out. Do it a little and then if it won't move do it a little harder.

Be carefull to not strike the valve head with the ease out. It will be better to be sure that the cylinder you are working on it at top dead center of the compression stroke. This will put the valve more out of the way of injury.

Good luck.

Zane

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Mike

08-05-2003 19:18:30




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 Re: Re: spark plugs broke off in reply to ZANE, 08-05-2003 06:13:02  
Ouch,
Another item I've picked up lately is a couple of sets of reverse twist drills, that way as you are cutting a hole in the plug or a stuck bolt, you are also tristing the item in the "out" direction. A lot of the time this will take the stuck item out without further ado. Good luck.

Mike



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Rob N Va

08-05-2003 06:57:21




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 Re: Re: spark plugs broke off in reply to ZANE, 08-05-2003 06:13:02  
IFFN it was me, i'd pull the head just to be safe.



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duey

08-04-2003 21:32:37




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
2 out of 4 is not a good thing, even 1 out of 4 is bad. I'd recommend that you pull the head and take to a machine shop.... If they can't save it, you'll be needing another head....

Drain the coolant, bite the bullet and yank the head. I wish there was better news.....duey



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no eazy out . . . Dell (W

08-04-2003 20:46:35




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 Re: spark plugs broke off in reply to ouch, 08-04-2003 20:22:31  
usually some PB-15 or other rust-desolver works..... ..... BUT NO EAZYOUTS..... .EVER.....(they never work)

Use a strong 6-point sparkie socket after good long overnite soak.

Thats the problem with using long reach sparkies (0.500), the threads get carboned up and can't be eazily removed. The standard sparkie for the N-Flathead is 0.475? thread length.

You may have to remove the cylinder head.

Next time use sparkie anti-seize paste on your sparkie threads..... ....Dell

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ouch

08-04-2003 21:19:28




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 Re: Re: spark plugs broke off in reply to no eazy out . . . Dell (W, 08-04-2003 20:46:35  
All that is left in the hole is the threaded part of the plug, the rest broke off. He has twisted the head of the plug, with electrod and everything. I have never seen a plug do that.I have broke off the porcelain part before, but he twisted everything but the threaded part of the plug out.



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Fast Ed Ohio

08-04-2003 22:41:35




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 Re: Re: Re: spark plugs broke off in reply to ouch, 08-04-2003 21:19:28  
Dont know if this will work or not, try a cold chisel at just the right angle ( after soaking in PB Blaster overnight) Tap, tap , tap , often times this will break loose a very rusty bolt, good luck. dont mess up the treads in the head.



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