What tool does it take, and what size, for the drain plug on my '61 Bentley S2 rear end? It looks like it might take an allen wrench or a tork tool to do the job. Cecil..........
A 9/16" or 14 mm Allen wrench should do the job if you use it carefully. There is a slight taper in the hex hole in the plug. One solution is to get a piece of 5/8" hex bar and file a taper to match the plug. The same wrench will do the petrol tank drain and the engine oil drain.
Leho