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Byron Lane

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Since: Aug 16, 2007
Posts: 1



(Msg. 1) Posted: Thu Aug 16, 2007 3:12 pm
Post subject: Slave clutch piston problem
Archived from groups: alt>autos>porsche>944 (more info?)
Hi, I have a 1983 and one-half 944. My slave clutch piston had a leak
and I snapped off the head of the top bolt trying to replace the
piston. The piston housing is off now but anyone have a suggestion on
how to get the remaining part of the bolt out of the aluminum housing.
I have tried drilling it out with the hardest drill bit I could get
from an Aerospace parts crib with no success. It is in a difficult
place to drill and when the drill bit slides off the bolt it just eats
the aluminum like it was butter. Any suggestions on how to get it out
or a way to work around it will be appreciated. What about using only
the lower bolt to attach the piston? TIA.

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darthpup

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Since: Jul 17, 2007
Posts: 10



(Msg. 2) Posted: Thu Aug 16, 2007 3:12 pm
Post subject: Re: Slave clutch piston problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
I have used a high speed drill such as the Dremel with a diamond
impregnated bit to drill a hole into the bolt, then drive an easy out
into it and twist out. If that still does not work just destroy the
bolt with the diamond bit. These diamond tools are now fairly common
and not too expensive. Made in China.
Of course it might work OK with just one bolt holding the slave on.
No real experience with that approach.

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William Noble

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Since: Nov 07, 2007
Posts: 137



(Msg. 3) Posted: Thu Aug 16, 2007 6:52 pm
Post subject: Re: Slave clutch piston problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
what darthpup says, but with this variation - use the dremel tool to cut a
slot in the screw and use a screwdriver to extract. AeroKroil is great for
helping unseize bolts, spray with Kroil and wait a few hours - repeat, then
remove. If it is seized solid, use a left hand drill - first you need to
get a pilot hole so you dont' keep slipping into the aluminum, then drill
out with the LH drill - usually the LH drill will at some point bind and
unscrew the thing for you - the bolt is not hardened. using a air driven
right angle drill may help. Be prepared to helicoil the hole if you mess it
up. Using one bolt will be a disaster waiting to happen, don't do it. if
you are close to needing a clutch, this is a great time to do the clutch job
and drill out the bolt while you have it apart (by the way, I have a spare
bell housing if you would like a replacement)
"Byron Lane" <dontwantany.DeleteThis@optonline.net> wrote in message
news:1869c3l43181eb58cvunl7ing3kt650bcj@4ax.com...
> Hi, I have a 1983 and one-half 944. My slave clutch piston had a leak
> and I snapped off the head of the top bolt trying to replace the
> piston. The piston housing is off now but anyone have a suggestion on
> how to get the remaining part of the bolt out of the aluminum housing.
> I have tried drilling it out with the hardest drill bit I could get
> from an Aerospace parts crib with no success. It is in a difficult
> place to drill and when the drill bit slides off the bolt it just eats
> the aluminum like it was butter. Any suggestions on how to get it out
> or a way to work around it will be appreciated. What about using only
> the lower bolt to attach the piston? TIA.



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