Undoing crank pulley bolt?

facade wrote: It must be loctited. :pinch: I can try the blowlamp on the head on Saturday, )

What a nightmare. I think I would have tried the heat by now and defo an impact wrench.

If you end up going down the welder route, Get a nut large enough to fit over the bolt head and weld on, then you still have the new welded on nut to get a socket on. Similar to the photo.

If it is lock tighted then a small amount of heat should destroy the bond it shouldn't need to be red or yellow hot to get it out. Assuming that that is the problem. If it has been crossed and wound up with a windy gun you are looking at re tapping the crank. Good luck.

Mine was corroded in and took some shifting, 2ft breaker bar plus a lump hammer. The impact force goes a long way to help getting it undone.

Can't move it!

It isn't a left hand thread is it?

Got mate pulling with all his weight on the 4 foot bar, I thought the engine mountings would rip apart, and then belted the bar close to the socket with a lumphammer. Not the slightest movement. (Apart from I now have a permanent bend in the bar)

Warmed the bolt until it glows red, and the rubber on the pulley smokes, and tried again, nothing. (probably wrecked the oilseal now)


Looks like a major operation now, make a drill guide and centre drill the head off, then if the thread is seized drill that out and clean the threads up. Bumper off to do that though.

Last chance is next door's son in law is a breakdown mechanic, and probably has a powerful electric impact gun, he comes round to see them tomorrow.

facade wrote: Can't move it! Warmed the bolt until it glows red,

I wouldn't have heated it that much - unless it pigged me off. :laugh: :laugh: