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#1
20th January 2016, 12:59 PM
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Spark Plug came out!
Arrrrrrrgh!
Driving this morning and the engine light came on, stopped and used the code reader and got ODB 303 for a misfire on cylinder 3. Now I have no idea how this has happened but the plug has worked itself out and fired itself into the coil pack destroying everything! Trouble is the thread in the head has been damaged so I cannot get a new spark plug back in! How much of a headache is it to repair the thread? 
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#3
20th January 2016, 05:25 PM
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I think its M14x1.25. I think I have a tap that size in the workshop if you need it.
Its possible to have the head helicoiled if you can't recover the thread. I had a Polo done many years ago. The challenge would be getting the tool in there since it's recessed so far, but a decent engine shop should be able to figure it out.
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#4
20th January 2016, 06:13 PM
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I have ordered a thread chaser tool to see if I can use that.
Looking at it tonight its only the first thread part that's damaged and the rest seems ok. I suspect the plug worked its way out then combustion fired it out at great speed, damaging the last thread and smashing it into the coil! Its still an almighty pain the arse though!
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#5
20th January 2016, 06:18 PM
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The difficulty will be in making sure no metal fragments drop into the bore and down the piston skirt.....
__________________
===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD=== 2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus 2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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#7
20th January 2016, 06:29 PM
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Quote:
Might be possible to get a small endoscope/borescope down there to inspect it. I use this one: http://www.amazon.co.uk/gp/product/B00KV669US Works quite well, but I'm yet to try poking it down a spark plug hole.
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------  ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust Last edited by moltuae; 20th January 2016 at 06:32 PM.
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#8
21st January 2016, 08:36 AM
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Thats not so good! How long ago was the plug changed/tightened?
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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#10
27th January 2016, 05:25 PM
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Standard Spark plug chaser did not work as it cannot even make a start into the top thread. Looks like the first thread is damaged but all others are good and true.
So after a major google session and a few threads on other car forums I have found a plan B! Purchased one of these online and could be perfect!  http://www.sealey.co.uk/PLPageBuilde...roductid=14856
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