Exhaust 300tdi removal

Trying to remove my old exhaust and replace but having issues getting this nuts offs. Can I cut them? As I can’t see how they will fall out. They look attached to turbo? Or do they have to be left for new exhaust pip to slot onto?
Photo attached, thanks.

Its much easier if you can leave the studs undamaged as any you cut or break off will need to be replaced. A nut splitter could be useful although I'd probably get them hot and use a really good fitting socket.

Kev12 said:

Its much easier if you can leave the studs undamaged as any you cut or break off will need to be replaced. A nut splitter could be useful although I'd probably get them hot and use a really good fitting socket.

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Managed to get two off. The third one at the back is rounded and beyond repair. Could I just drill it out and spot weld a new thread in?

BostonTar said:

Managed to get two off. The third one at the back is rounded and beyond repair. Could I just drill it out and spot weld a new thread in?

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Have you tried hammering home an irwin nut remover? if you can clear the thread, or even a long series smaller socket to get a bite?

Cheers

That will need heat to remove it, heat the flange round the stud that the rounded nut is on then
heat the nut & hammer a smaller socket onto it or irwin, better with an impact socket a normal one may
split. If you cut it off you can use a stud extractor to get the rest of the stud out. If youve got no
heat run the engine for while & hammer the socket on the stud, it may shift.

Purchased a nut splitter but I’ll try the heat gun first. I’ll update here when solved! Cheers all!

I find a Dremel (or similar) with the flexible extension & the small reinforced cutting discs very useful for cutting things - incl nuts - in tight spaces.

Update: No luck had to cut it! The nut cracker didn’t fit behind the stud. Probably the original nut since 1996! Thanks for the help however, useful tips!

Soak nuts/threads with Plus Gas for a couple of days. Then apply heat using MapGas [butane's not hot enough] then crack off. They can be buggers to remove and the stud will often come free with the nut. Although a tight space it is possible to get a bar onto the socket head, it only needs the first crack to release, then back to ratchet and long socket. Buy all new nuts, washers and studs to do a proper job applying liberal amount of ceramic grease/copperslip upon reassembly.