smart51
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| posted on 25/6/17 at 03:40 PM |
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Best way to remove a rounded off nut
My MR2's exhaust broke yesterday where the flexies meet the cat. I've taken the cat off but one of the nuts holding the flexies to the
manifold is rounded off a bit. It isn't too bad (see the pic) but the other nut took a lot of force to remove. Predictably, it is in an
inaccesible place. A deep socket on a 300mm extension can reach, but you can't get a nut breaker or an angle grinder in there. Or even a
spanner, not without removing the subframe.
So, what's the best way of getting it off?
 
Exhaust Stud
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cliftyhanger
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| posted on 25/6/17 at 03:52 PM |
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Any chance of a "slightly too small" socket that can be hammered on?? 12 sided sockets are good for this.
Adition bonus the hammering helps free the nut....
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smart51
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| posted on 25/6/17 at 04:00 PM |
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I've tried but a 13mm socket is not going to go on.
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loggyboy
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| posted on 25/6/17 at 04:03 PM |
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Looks like an etorx bit. Might be an option for a hammer on.
Mistral Motorsport
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smart51
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| posted on 25/6/17 at 04:37 PM |
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quote:
Originally posted by loggyboy
Looks like an etorx bit. Might be an option for a hammer on.
that's the stud and also the reason for a deep socket.
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loggyboy
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| posted on 25/6/17 at 04:42 PM |
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Can you not withdraw the stud?
Mistral Motorsport
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matt5964
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| posted on 25/6/17 at 05:26 PM |
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We do a socket which will work on a faster that's 95% rounded off it's our own brand kengrip
It works by driving the centre of the flat face of the nut not the points like conventional 6 or 12 point drives
https://www.cromwell.co.uk/shop?query=Kengrip
They really work well
Luego velocity XT 2.0ltr 221.3bhp 178.9lbft
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rusty nuts
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| posted on 25/6/17 at 05:48 PM |
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Can you get at the nut with a nut splitter ? Failing that a sharp chisel in line with the stud should split the nut , I've removed loads of
exhaust nuts that way. Don't know about the Kengrip but if their anything like the Irvin nut removing tools they work well but if the nut has
rounded due to being siezed then heat or splitting is the way to go.
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smart51
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| posted on 25/6/17 at 06:02 PM |
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quote:
Originally posted by rusty nuts
Can you get at the nut with a nut splitter ? Failing that a sharp chisel in line with the stud should split the nut , I've removed loads of
exhaust nuts that way. Don't know about the Kengrip but if their anything like the Irvin nut removing tools they work well but if the nut has
rounded due to being siezed then heat or splitting is the way to go.
A chisel might work. The nuts have got slits in them so a blunt chisel may do the job
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gremlin1234
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| posted on 25/6/17 at 07:04 PM |
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quote:
Originally posted by matt5964
We do a socket which will work on a faster that's 95% rounded off it's our own brand kengrip
It works by driving the centre of the flat face of the nut not the points like conventional 6 or 12 point drives
https://www.cromwell.co.uk/shop?query=Kengrip
They really work well
I have used 'surface drive sockets' and the do work remarkably well
another option is to weld something to the rounded nut then turn that.
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tims31
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| posted on 25/6/17 at 08:49 PM |
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I have a set of these that work really well, hammer on and as you undo the nut/bolt the spiral grips down the flutes
Irwin bolt extractor
Build: http://www.martinsfurybuild.co.uk/
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nick205
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| posted on 26/6/17 at 09:17 AM |
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Looks/sounds tight for access otherwise I'd suggest welding another nut on.
Do you belong to any MR2 forums? May well be a common issue and they may well have a proven solution to resolve it.
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motivforz
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| posted on 26/6/17 at 10:09 AM |
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My first port of call is normally lots of heat followed by plusgas. The thermal growth then cold shock often breaks the corrosion bond between the
two. Then molgrips or an under sized socket as above. Keep a fire extinguisher handy!
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Brian R
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| posted on 26/6/17 at 05:54 PM |
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Maybe try something like this. I used something similar on a munched pozi drive screw and it worked fine.
There are several types/brands on the market.
http://www.toolovation.co.uk/mobile/Product.aspx?id=37759
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