Two GearWrench 81670 (long-handle 13mm combo)
Some day soon(?) will be pulling engine and transmission from 84 spider. Fighting with (4) U-joint flange bolts that will not budge! I am 1 for 4. Looks like it was recently disassembled because there is a new looking drive shaft carrier and fresh paint mark on the flanges. Nuts and bolts don't look rusted but maybe over-torqued? It doesn't help that the 13mm open end wrenches I am using are about 5 inches long and I can not get a socket on the nut or bolt. Any suggestions? Thanks Much
I had the same problems removing my propshaft bolts - no access for box wrenches or sockets, nuts frozen, and I only owned short 13mm open-end wrenches. So I bought 2 of these off ebay:
GearWrench 13mm Long Pattern Combination Wrench 81670 | eBay
Less than $10 (delivered to my door within 5 days) for both of them!
Then I arranged them like plier handles (one on a bolt head, the other on the associated nut) and just squeezed. Voila!
Of course if your bolt or nut heads are rounded off too badly already you will probably need to cut them off with a small grinder, Dremel, or nut splitter, and then purchase new bolts/nuts from Europe.
These bolts and mating nylock nuts are only available new from Europe (Classic Alfa, Alfaholics, Alfa-Service, etc.) and they are a specially hardened material and a rare M9 size. Don't be tempted to use "something close" that you find locally. These fasteners get a lot of torque/stress applied to them so you want to use the exact OEM replacements on the driveline flanges.