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[DaveA]

      The two front exhaust manifold studs have sheared, been trying get them out using a set of stud extractors, tip of one broke off in stud.  Does anyone have advise on how to remove it, or know of anyone/business in Melton area who can help.
      Car us at the moment I'm not mobile. Head is off the car on the bench.
   
 

[Aundie]

Carefully drill out the centre of the stud slowly increase drill size utill you can peel away what's left of stud. Then run the correct size tap in fir good measure.

[Andy H]

Trouble is that the stud extractor is harder than a HSS drill bit. You need to get it out before you can do any drilling.

If you can get to the other side of the broken stud (unlikely) and drill through you could use a punch to drive the remains of the stud extractor out. Otherwise you will either have to break it up and pick the pieces out (using centre punch and pliers) or find someone with a spark erosion machine to remove it.

Failing that put a 'wanted' ad in the parts for sale section for a good used one

Finally....... chuck the stud extractors in the bin where they belong.

[DaveA]

  Thanks

[Marks DTM Calib]

If you could get the head to West Bridgford - Nottingham I could probably sort it.

Top tip, NEVER use stud extractors, there rubbish and get you in a deeper hole!

[Andy H]

I have just realised that you might be referring to a stud snapped off in the head (not in the manifold itself).

Clearly no point in swapping the manifold if there is nothing wrong with it .

Sorting steel studs seized into aluminium is a real art. Get the head to MarksDTM for attention if you can (and see an artist at work)

[AndysCD]

if you have access to a mig welder, i sorted mine by welding some 13mm nuts to the ends of the broken studs and then using a combination of 13mm spanner and cold chisel to gently ease them out..

Regards
Andy

[DaveA]

If you could get the head to West Bridgford - Nottingham I could probably sort it.

Top tip, NEVER use stud extractors, there rubbish and get you in a deeper hole!

   Thanks Marks
                       Will see if I can find a ride will PM if possible. 

[DaveA]

I have just realised that you might be referring to a stud snapped off in the head (not in the manifold itself).

Clearly no point in swapping the manifold if there is nothing wrong with it .

Sorting steel studs seized into aluminium is a real art. Get the head to MarksDTM for attention if you can (and see an artist at work)

   Hi Andy
           This was a replacement head, after I had been ham-fisted and damaged the original, wanted to give it  a good clean/service maybe get it skimmed if possible, sheared the studs, then I went the extractor route   never again Mark.           Then to top it all I walked into a shelve and gashed my head. Not one of my best couple of days      

[DaveA]

if you have access to a mig welder, i sorted mine by welding some 13mm nuts to the ends of the broken studs and then using a combination of 13mm spanner and cold chisel to gently ease them out..

Regards
Andy

   Hi AndyCD
       The one I'm having the trouble with sapped below the surface of the head.

[AndysCD]

Hi Dave
Depending its not snapped too far into the head it's still possible to extract using a welder.
One of mine was below the surface of the head, had to apply some short bursts of weld creating a "blob" of weld . I then welded a large washer onto the blob and used a cold chisel to drift out the remaining bit of stud. I could have also weeded a nut onto the blob of weld and turned out using that. Don't build up too much heat using this method though or you will damage the threads in the ally head

Andy

[DaveA]

   Thanks all
               Sorted stud out   Now to put it back together