arnold...theres no drain plug, unless they added one on the later cars...easiest way would probably be to buy a siphon...or undo the fuel feed line and use the fuel pump to help empty it, kinda dodgy though...and i dont want to be responsible for something blowing up.
Seriously? There's drain plugs on most cars, including the K10 so would have imagined the K11 had one. Sorry if i'm wrong though! I thought they added those metal things inside the fuel neck to stop people removing the fuel from the filler neck.
yeah, i spent ages looking for one but no joy (think the haynes says there aint one either)......at least theres nothing that looks like a drain plug anyway.
theres the little metal flap thing at the very top of the filler neck and one at the bottom (just after the opening to the tank) but id reckon you should be able to get a siphon in there...ive never tried mind, as to empty mine i removed it from the car and jammed open the flap about poured it out into a container...not the safest way to do it, lol...but it did empty it.
You can disconnect the fuel hose from the front of the engine bay, even without the pump running it self syphons, all be it slowly, as long as it's low. I drained by tank with a 12v supply on the pump without any problems prior to dropping the tank out for rear and strengthening work.