madteg
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| posted on 8/10/13 at 09:43 PM |
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Plug snapped
Work colleague has snapped a spark plug flush with top of thread on zetec. The question is how to get the rest of the plug out. Thanks.
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adithorp
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| posted on 8/10/13 at 10:18 PM |
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Awkward due to how recessed they are.
Should be possible to pull the insulator and electrode out using long-nose pliers. Then drive(hitting it helps loosen it) a splined, torq or allen key
socket (whichever fits best) on an extention into the hole through the plug . Unscrew with ratchet.
Worst case, it doesn't work and the head has to come off. Not failed to get one out that way yet though.
edit... Push a little grease down the plug before the socket to catch any swarf from driving it in
[Edited on 8/10/13 by adithorp]
[Edited on 8/10/13 by adithorp]
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Mr Whippy
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| posted on 9/10/13 at 06:39 AM |
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Hmm don't know seeing the head is aluminium and mostly hollow I'd not be happy bashing anything into the spark plug, just I case it
started to crack or distort, personally I'd just bite the bullet and take the head off then give it the a specialist to remove them and clean up
the threads. I'd also be concerned if any ceramic fell into the cylinder.
I do see a lot of cars these days where no copper grease has been applied to the threads which is very poor
[Edited on 9/10/13 by Mr Whippy]
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jossey
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| posted on 9/10/13 at 07:28 AM |
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I world take off the head first n try as aid suggested bring careful.
You don't want bits if spark plug in the engine
Good luck with that
Thanks
David Johnson
Building my tiger avon slowly but surely.
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redturner
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| posted on 9/10/13 at 08:34 AM |
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I would pay good money to watch someone remove the ceramic and electrode from a broken spark plug without the bit's dropping down the bore. I
modified a spark plug a few weeks ago to make an adapter for the dti gauge and it took a lot of hammering to get the bits out and that was in a vice
not stuck in a delicate cylinder head. Take the head off and do it properly
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