GTV6 crankshaft pulley nut - last resort ideas?
I've never known any nut, anywhere, on anything to be as tight as the crankshaft pulley nut on my GTV6. This is a car on which many parts have been unnecessarily difficult to remove (one day in the future, somebody is going to be very grateful for the amount of copper grease I've been smearing over nearly all the threads in the car - save those few where you want loctite). And this nut is the last nut remaining to remove.
However, we have tried everything we can think of, and to no avail. I've even been asked if I'm sure it's not a left-hand thread (surely if it was the manual would say so...). Yes, the metal ring has been tapped out from the groove. And yes, the engine is locked in position.
The manual does say remove the calking... Can't see any, but with the amount of time the blowtorch has spent heating up the nut I'm surprised the block didn't melt (OK, I'm exaggerating there) as well as various products sprayed on it, so any calking ought to theoretically be long gone... A snap-on air gun running off a pretty big snap-on compressor was a waste of time. A 3/4" drive socket arm, with a meter long tube slid over it for extra leverage as a breaker bar didn't do anything either. No way is a torque wrench going to work like the manual suggests.
It's a shame, because I've got new crankshaft oil seals etc and it would be nice to put them on, but I've reached a point where I'm afraid that using any more force than I have already will damage the block - or the engine stand, and I've resigned myself to accepting that if the oil seal does fail one day (if it hasn't already - the whole of the engine was covered in crud so hard to see where it was coming from) I'll just have to top up the oil every so often. Better than risking a cracked block.
Although, if anybody has any last-resort ideas that are worth a try before the engine goes back in the car, please let me know...
1975 Giulia GT1300 Junior, 1981 GTV6, some modern German stuff, and a 1958 Messerschmitt KR201.