Jim,
If you try to unscrew the helicoil using the bent piece at thee bottom
of the hole it won't work. When the helicoil is installed it uses that
tang to reduce the diameter of the insert slightly, allowing it to be
screwed into the hole. Trying to turn it backwards will make the insert
tighter.
If you mean that the outside of the insert is bent and you can get hold
of it, then yes, you can unscrew the insert with that.
Is the hole blind, or does it open to some area that you can get to from
the back side? If you can get to the back you can run the insert farther
in until it falls out, then retrieve it from there. I wouldn't want to
leave it inside the engine under any circumstances.
If you have a Dremel and a small grinding burr, you should be able to
get inside the hole and cut the insert into rings that can be pulled out
one by one - assuming that the hole is big enough!
Good luck.
Peace,
Pat
Thusly spake Jim Stone, On 2/25/2011 6:12 PM:
> The aluminum head on my Alpine was repaired at some point in the past with a
> helicoil insert. I am in the midst of replacing the intake manifold and the
> coil threads seem to have been damaged (I believe the end of the coil is bent)
> so I need to remove the old one and insert a new one. I really do not want
> to have to remove the head and am hoping I can just do with with the head
> still installed. I have never worked with helicoils before, but the process
> seems simple enough. However, there is not much online on removing them.
> Does anyone here have any suggestions or advice? I see that there is a
> removal tool out there, but that seems like overkill for one coil. Can I use
> a screw extractor? Bend the end of the coil more and unscrew it with a needle
> nose pliers? Any recommendations or suggestions will be appreciated.
>
> Thanks.
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>
--
Pat Horne, Owner, Horne Systems
(512) 797-7501 Voice 5026 FM 2001
Pat@HorneSystemsTx.com Lockhart, TX 78644-4443
www.hornesystemstx.com
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