Stud extractors

Post Mon Feb 06, 2006 12:14 am

I need to remove an exhaust manifold stud with a 1cm stump.
what is the best type of extractor to get ?

this kind

or this

the socket type is putting me off, because i dont know exactly how they work.

please enlighten me!

Post Mon Feb 06, 2006 12:20 am

If there's a stump sticking out, then weld a nut onto it. This will give you something to turn, and the heat shock from the welding will probably unseize the stud.

Post Mon Feb 06, 2006 12:24 am

I think those are for rounded nut's and bolts.
If it's got 1cm sticking out just use a pair of mole grips and get them on as tight as you can and go slow as it will have thread lock holding it in.

If you mean it's got 1cm left in the bolt hole then you need a stud extractor and all they are is a tapered spike with an anticlockwise twist to it. You drill into the left over piece of stud and then insert the extractor as far as it will go and just twist.
Piece of piss

Yeah right, it's one job that can go absolutly wrong in every way.
Good luck.

Post Mon Feb 06, 2006 12:28 am

thanks for the advice. but the manifold is attached to the car, and therefor quite inaccessable(sp) with a welder.

I dont want to remove the manifold for the sake of one stud. and since the exhaust isn't blowing, it isn't a priority.

edit:

the spike type are called easy-out's and are pretty crap (imo) I used them once on my brake bleed screws, and never again. thanks for the advise tho

Post Mon Feb 06, 2006 1:17 am

smithy, get the second type in the red box, they work well. 3 cam lobe type things inside that grip the stud when you twist the thing. work both ways too so good for putting studs in.

i got that set when in trouble with the m535 and it saved me having to have the head off.

however brian is right, if you can weld something to the stud do that as the heat shock may break the corrosion seal. at least use a blowtorch on it before the extractor.

and as for those easy outs...

they shouldn't be sold

Post Mon Feb 06, 2006 7:14 am

Toby_Unna wrote:smithy, get the second type in the red box, they work well. 3 cam lobe type things inside that grip the stud when you twist the thing. work both ways too so good for putting studs in.

i got that set when in trouble with the m535 and it saved me having to have the head off.

however brian is right, if you can weld something to the stud do that as the heat shock may break the corrosion seal. at least use a blowtorch on it before the extractor.

and as for those easy outs... they shouldn't be sold

im gonna have to agree on easy outs

Post Mon Feb 06, 2006 12:47 pm

I had to remove exactly that stud. I borrowed some spline type extractors, which are really good but couldn't get decent access to operate them. I ended up taking the manifold off and clamping the stub in a vice(tight) and turning the manifold. Luckily got away with only one sheared stud in the head, it was in the middle and I could still get a couple of turns on it - jammy.

N.