Bolt sheared AAAAAAAGH!!!!!

[corradorocks 0]

Hey Guys,

I can really do with some advise,a bolt sheared that holds the sub assembly to the main chassis,

 

I Know this is going to be bad but what do I do?

 

I get the feeling drilling it out is not going to work

 

How easy is it to take the carpet up?

Is the thread in the chassis like a self clinching bush that I can hammer out?

 

I've read somewhere that it might need cutting out and a new one welding back in, does this really mean i got to cut a hole in the chassis?

 

How much do you think this would cost to get done from a garage?

(I'm in sussex)

 

I hope this isn't going to be the thing that leads to the breaking of my car :(

[_Monkey 0]

I can't picture the bolt you mean, but you can get stud extractors that you can hammer in and pull the broken bolt out with....

[W3RKD 0]

Post up a picture if possible as we have had to remove a few of these snapped subframe bolts now, i may be able to advise

[corradorocks 0]

Awesome, I'll try take a picture as soon as I can,

 

Its one of 2 main bolts that hold the subframe to the chassis underneth the car? Think theres captive nuts under the carpet on the driver side and passenger side foot wells?

 

How do the stud extractors work you need to drill in to the bolt to hammer the extractor in don't you?

 

Think these bolts are super hard high tensile steel very hard to drill bolts?

[tonedef 8]

As you say, stud extractors work by drilling a hole in the centre of the remaining bolt before inserting the extractor with it's left handed tapered thread to unscrew the stub. Drilling the hole often relieves the bolt enough to get it out, I bought some from Snap On with tricky left handed cobalt drill bits, they drill through anything and the bolt will often come out on the drill without even using the extractor, not cheap though :shock:

[corradorocks 0]

Ok I found this picture off of E-bay its of a golf mk3 subframe but I thought it'd do for demonstrating the green pointer shows where the bolt thats sheared off of the corrado subframe goes and its in the main chassis the rest of the bolt is stuck in... I'm going to try find some left handed cobalt drill bits as suggested by tonedef and hope, pray maybe even do some hell marys it'll work!!!

 

Failing that what am I to do?

 

G-man its jaz! I had the same problem with a solid front engine mount not sure if you remember me?

 

you sorted me another mount but you never got back to me about if I owed you anything for it? Did you manage to get that bolt out of the BBM one?

[Corrado_Addict 0]

Cobalt drills are exteremly strong, with a powerful enough drill then hopefully that should be enough to drill the bolt. Fingers crossed :)

[corradorocks 0]

Does anyone know the right way to drill high tensile steel? Slow or fast?

 

If I try slow it might never get going but if I try fast i might just end up heat hardening it further??

[corradorocks 0]

Hey Guys!! I Done it!!!

 

Turned out not to be high tencile steel so was able to drill in to it then loads of plusgas and an easy out!! jobs a gooden!!!!

 

had to go out and get drunk after that! what a relife!!!!

 

Thanks for the help!!!