Hi
I'm dropping the front subframe and there are two bolts through a steel bracket that connects the front of the subframe to the chassis (numbered 1 in the attached image). These seem to have sheared a captive nut off, I can't see exactly what is happening but I can see the other end of the bolt through a hole in the box section spinning when I try to loosen the bolt.
Any ideas how to get these out? I'm hesitant to cut the heads off the bolts as there is no gap between them and the bracket.

 

Although it is for the xtype you will find some good ideas in the thread for tackling your loos nut.

https://www.jaguarforums.com/forum/x...e-free-113243/

 

What a pita! You have no choice but to cut them off some how and keep the bracket damage to a minimum. You will want to repaint the brackets anyway.


My bolts sheared off, then the captive nuts also sheared off when I will drilling out the sheared bolts.








Both sides were the same.


Here is what eventually came out.







Next I cut out holes.





Made up these.





Then tacked them in position and check they were in the correct position with the bracket.





I then got a pro welder to come round and weld them in properly.

 

Yeah PITA is right- so far I've had pretty good luck with bolts not shearing. Then I rounded the vee-mount bolts..
Thanks for the tips - Are those patches lap welded on top of the box section, or flush?

 

They were lap welded.


I used this crows foot for the V mounts.

 

Thanks again- your threads have been really helpful, not just to me, I'm sure! I'd forgotten about your nut trouble!

 

sorry- one more question!
How thick is the box section? I've been practising on 2mm but suspect it's thinner on the car. I know I could just go and measure it, but I haven't cut the nuts out yet.

 

From memory it was not that thick, no more than 2mm and perhaps a bit less. I did not have a gas set up for my mig at the time and was using flux core wire so did not want to do the job myself, especially as its upside down.


If doing it again with my gas set up I would have a go, however welding upside down is a pain.

 

Good, as long as it isn't too thin I should be ok. Not looking forward to upside down welding but it's got to be done I guess.
My v-mount bolt is an earlier torx one, which has of course rounded :-)

 

also try using a propane torch and heating the bolt and while hot spray with rust buster the heat will suck it into the threads and possibly help break free the rust if you repeat wipe it down first so as not to supply fuel for a fire.

 

wolfpck; the issue is that the captive nut inside the box section has sheared off. no amount of heat is going to help.