I had exactly the same problem ( partly my fault as I was being impatient and tried to use an impact gun to take the first one out... - don't do that! lol )
As others have said. The only solution is to cut the bolt off then remove the sub-frame so you can then trim off the rest of the bolt sticking out, then ( with a lot of swearing ) extract the captive nut and spring clip from the hole. After that it was a simple matter of getting it hot ( blow torch ) and it came apart easily.

Many thanks to Steven B for confirming that it was actually possible to remove the bolt in this manner.

My brake pipes were shot too - and not just where they were visible with the car fully assembled.

 

you didnt need to drop the sub to do the rear pipes

takes like 2 hours max

 

Another way may be easier, or better

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Old 08-21-2021, 01:48 PM
Gino
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DefaultI managed to remove the bolts from the front subframe mounts. I don’t think it would have been possible without the induction heater. Thankfully, when I originally attempted to remove them I paused thankfully not damaging the nut ‘clip’ too much.
The heater got the exposed part of the bolt cherry red, after that it was a doddle.

 

Very true - however you do need to remove the fuel tank to do it properly and to do that you need to remove the front two bolts on the rear sub-frame...

 

nope

you can attach every single clip without touching a single bolt

 

You must have very thin fingers indeed is all I can assume