Reply To: Crankshaft nut

Mark,

Those wretched nuts either work loose and cause problems or seize and cause different problems.

I suggest you drill the nut, starting with a small pilot midway between the id and od then open the hole up as much as possible without damaging the thread.  That will weaken the nut enough to be able to split it with a chisel and release the stickfulness.

When we rebuilt our engines, both Phil and I fitted specially modified hex nuts with thread locking products.  In addition, I made a lockplate from a modified flywheel lockplate.  It ain’t pretty but it is effective (and out of sight).

If you are interested I can post some pictures of both the nut and lockplate.

B….