8 replies to this topic

[mikko]

Hi all! In the proccess of refurbing my rear subby and as many of you will know it's hard not to shear bolts when doing this, so my question is, how do I refit the radius arm bracket as there is no space at the back of the subby to put a socket or spanner to stop the bolt from turning? pics- I hope this works.

[Rosslin Racing]

try welding a nut on the back. you will not need a spanner then.
and give the mig abit more gas as you are tring to weld on to rust.

[mikko]

cheers for you r idea but there's barely room through that hole for a finger never mind mig nozzle. think im gonna try with the trunnion off, does anyone know what the tool is called that is used to remove it?

[lrostoke]

Pair of mole grips or similar hold the round bit, then a socket for the nut.

If you've the spanner for a grinder with the two prong, might be able to hold it with one of those

Have you tried drilling out the snapped bolt, sometimes the force of the drill and the heat can also free the snapped bit.

Edited by lrostoke, 17 December 2008 - 06:05 PM.

[mikko]

gonna go out and give that mole grip idea a go now, thanks. my problem isn't the snapped bolts, these are nearly all out via drill, people who's bolts have not snapped would have this problem also, if you look at the pic in the middle, that circular hole isn't big enough for a spanner or sockett to hold the new nut.

[lrostoke]

No normally the holes are threaded, so if the bolts don't snap you are just screwing new bolts in.
So basically the threads have beem lost when drilling out the snapped bolts

[mikko]

I see. cheers for your collective input, think this is gonna be a nihjtmare, may be easier with the trunnion off, I,ve got the subby half painted so gonna give it a go tomorrow.

[1984mini25]

I would give up on trying to get accesses for a spanner and nut/blots to hold the radius arm on.

Another way and is the way I’ve overcome and fixed broken/snapped bolts on my rear stubby is remove the nut in which the broken bolt is stuck in with either a chisel or drilling it, then enlarge the hole, preferably with step drill bit to 13mm and then tap a mate/13mm hex nut into the hole so it sits just prod of the surface, thread in a spare blot a couple of threads to give something for you to attach the earth clamp and stop any welding spatter messing up the threads, then just weld the nut in place with plenty of penetration and grind flush.

[998dave]

With mine I had to remove the trunion, it had seized so undoing the nut was easy, then hammered out, I greased it when putting it back in, and had to use a pair of mole grips to hole it in place while tightening.

With trunion out there's plenty of room to fit the radius arm nuts, if you can stick a couple of welds on to make them captive in the future.

Also in future when removing the bolts spray penetrating oil everywhere, and give the end of each a few smacks with a big hammer just before undoing, they come out more easily, (got all four out without a break this way).

Dave