[Healeys] Looking for ideas

Curtis Arndt cnaarndt at gmail.com
Fri Jun 26 11:39:10 MDT 2015


Micheal,

My short article on removing broken studs from Manifolds...

*Removing Broken Studs from Cast Iron Manifolds*



This is method that I use to remove broken bolts and studs from cast iron
exhaust manifolds. With a broken stud in a manifold, as long as I can get a
small pair of long nose locking pliers onto the screw, bolt or stud then
the rest is typically easy, if you are patient.



I heat *only* the exposed stud or bolt with a torch to *cherry red* and
then shock cool it with a wet rag, followed by some penetrating solution
like "Kroil" or "PB Blaster".  Then I carefully clamp the needle nose
locking pliers on the end of the exposed stud and GENTLY rock it back and
forth ever so slightly.  If you get any movement whatsoever back and forth
the rest will come, if you're patient.  Repeat the heating and shock
cooling process followed by the locking pliers as many times as it takes.
With patience and luck the broken stud will progressively unscrew a bit
farther with each application of heat and penetrating oil until it will
unscrew all the way.


I did this recently with a BJ8 Manifold where 7 of the 8 studs were frozen
and/or broken off.  Some of them had just ¼” of stud proud of the manifold.
All seven came out using this process.



This process may work on an aluminum manifold IF and ONLY IF you are
careful not to use too much heat near the aluminum.


On Fri, Jun 26, 2015 at 2:52 AM, Michael Salter <michaelsalter at gmail.com>
wrote:

> Thanks to all for the good ideas some I have already tried without
> success....Looks like cutting and drilling is to be the order of the
> day..unfortunately those pins are case hardened which won't make things
> easier.
> If all else fails new brackets..
>
> Michael S
> BN1 #174
>
> On Thu, Jun 25, 2015 at 5:42 PM, Michael <michael.salter at gmail.com> wrote:
>
>> I left the seized shackle pins in both sides of this BN1 when it went off
>> to TechnoStrip in the hope that they would come loose.
>> They didn't so I've spent an inordinate amount of time trying to extract
>> them without wreaking the mounts on the frame.
>> Made a special puller, applied loss of heat, drilled right through each
>> bush, grumbled a lot but they will not move despite being subjected to
>> massive amount of force.
>> Any ideas...damaging the mounts in the chassis makes for a very tedious
>> repair.
>> Michael S.
>> BN1 #174
>>
>
>
>
> --
> *If you can't fix it with a hammer, you've got an electrical problem.*
>
>
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