I replaced mine not so long ago and a few of them were really tight. In the bottom of the spark plug recess was black tar like stuff, i'm not sure if this made things worse or even how long the plugs had been in there. 8's a 96 and the plugs had Audi rings on them so who knows.
If you're going for it use a T bar to get evenish pressure if you can.
Also all that WD and sh it in the hole will now go into the hole when you do get the plug out, if petrol and gas don't come out under pressure WD isn't going in just being sprayed in there.
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1996 A8 4.2 QS. Bose, Solar roof, um...um... rally sport towbar. Now gone to a new home as the Traders 8.
Bright yellow bus o love.
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