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#1
2nd June 2014, 09:28 AM
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Spark plug change
I plucked up the courage and changed the spark plugs on my 8 all by myself. This was my first diy spark plug change in any car.
It wasn't that scary at all, none of them were seized, and to my untrained eye they all look fairly ok, number 3 looks like it had a bit of blow-by past the ceramic insulation. I didn't clean the threads using those thread cleaning tools, does anyone use those? This was 4.5 years since last change. Seems to start up quicker now. 
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#2
2nd June 2014, 09:54 AM
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Spark plugs are not to bad to change I don't think.
I've not done plugs for almost 8 years. the joys of diesels I guess. They look ok I think. 1 and 6 got some oil build up. Is that from a leaking cam cover gasket?
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[center] 06 3.0TDI Quattro: Options: Soft close Doors & Boot, Electric Blinds, Keyless Entry & Start, Bluetooth HandFree, Quad Zone Climate, APS+, 3 Spoke Sports Tiptronic Multi Function Steering Wheel, Heated Seats All Round, Black Leather Comfort Seats, AMI, Sunroof, Drivers & Passenger Electric Memory Seats, Auto Dimming Mirrors, Bi-Xenons AFS2, Dab, Digital TV, Reversing Camera, AV Inputs, Fridge, Solar Roof, TPMS, facelift rear lights, 3G, remote boot closure, Tow Bar.
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#4
4th June 2014, 05:15 AM
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The brown ring on the number 3 plug (and to a lesser degree 1 and 2) isn't gas blow by around the ceramic but a corona stain. The air around the spark plug is breaking down when charged when the plugs are firing (very high voltages from the ignition system) which statically attract oil vapours in the air to the ceramic.
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 PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound.  Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting. Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids 
Last edited by B@fink; 4th June 2014 at 05:21 AM.
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#5
4th June 2014, 07:10 AM
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Quote:
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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#6
4th June 2014, 03:35 PM
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Quote:
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Confidence is the feeling you have before you know better . . . .  Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble  Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs
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#7
4th June 2014, 07:29 PM
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I'm no educator, I'm simply parroting stuff on the World Wide Web
 ngk have very good technical information on spark plugs if you find yourselves at a loose end. They explain about the different heats of plugs, appearance of the plugs, what all the codes on plugs mean and all sorts of assorted other random technical stuff. You'd be surprised just how much goes into the humble plug! Read, learn and inwardly digest!
__________________
PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound. Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting. Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids
Last edited by B@fink; 4th June 2014 at 07:32 PM.
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#8
4th June 2014, 09:28 PM
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Thanks, good to know its not blow-by. Must be some un-usual discharge from old no.3 coil or plug, it has burnt the paint on the no.3 coil and the plug hole was full of its disintegrated dust when I cleaned it with pressurised air. Anyway that coil has now been replaced with a different old coil which looked like it was in better shape.
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#9
5th June 2014, 06:26 AM
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Have a look at the ngk website, it doesn't mention coil issues or the plug causing it, just that it isn't an uncommon thing to see if there's oil vapour near the plug. I assume anything with massive voltages in would have some form of charge near it which would make a static effect?
__________________
PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound. Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting. Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids
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