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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 04-12-2008, 02:41 AM   #1 (permalink)
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Spark plug thread snapped e39

Ok i think the title has summed it up.
Today i was happily replacing my spark plugs as you do, when unscrewing a spark plug, i found it came up with no thead on it.. Look down in the spark plug well, and i can see the thread is still in there.

I realise this is a major problem, but can anyone give me any advise on fixing it.

Thanks Michael

530i m sports 2001
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Old 04-12-2008, 10:04 AM   #2 (permalink)
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sp0rky is an unknown quantity at this point
You will probably have to have somebody heli-coil the head.
The most important thing you can do here though (wether you heli-coil it or not) is to vacuum out that cylinder with a straw on a shop vac as best you can.
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Old 04-19-2008, 07:25 AM   #3 (permalink)
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EZout

Get the right size EZout ...they have left handed threads and as you screw it in it backs out the threads...pretty easy!

GL

Get EZouts from Craftsman, Harbor Freight, Snapon any tool guy will know what they are.
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Old 04-19-2008, 11:24 AM   #4 (permalink)
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depending on how bad it is then like gsx said you can try an eazy out or you may even be able ot just walk the threads out with a screwdriver or small pick tool. Obviously the most important thing is making sure that no metal particles make their way into the combustion chamber. When you're done even if you dont drop anything in there you should still blow some compressed air in to the cylinder and listen for anything moving around in there just to make sure that nothing fell in there when removing the plug originally.
if possible post some pics of the spark plug as well as the spark plug bore in the cylinder head.
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