[Supras] Leaky head valley plugs

[Rockey Fox]

Oh yes the hex depression was essentially round from
using a cheater bar on the end of my 1/2" drive
breaker bar. I actually had sharpened the allen socket
before trying to break the plugs loose to ensure I had
as much area contact as possible but that was to no
avail. I also used a large OD easy out which only
worked after I had broken the plug loose with the
punch. 
I'm pretty sure I ended up making several punch marks
around the perimeter of the stuck plug before it
finally broke loose. I think the shock from the hammer
strikes finally broke the corrosion free which allowed
the plug to be removed.
I used ultra blue on the reassembled threads which
will hopefully make it easier to remove next go around
in a couple of hundred thousand miles....

Good luck,
Rockey 91T

--- berniek at technicaldevelop.com wrote:

> Rockey:
> 
>     Thanks for the response.
> 
>     Those damned plugs are so tight I'm concerned
> about stripping out the
> aluminum if corrosion has taken place.  Did you use
> enough torque in the hex
> depressions to twist them to uselessness first?  The
> plugs are deep enough
> in the valley that you can't get much of an angle on
> the punch except from
> each end.  .
> 
>     I've used the hammer and punch approach before. 
> Still have a first
> generation 1970 750 Honda bike (bought new, now in
> storage, gaining value).
> One time the oil filter hollow bolt was removable
> only by that means.  I
> could not do that today.  Parts are obsolete.
> 
>         Bernie
> 
> ----- Original Message ----- 
> From: "Rockey Fox" <supr91tt at yahoo.com>
> To: <berniek at technicaldevelop.com>;
> <Supras at supras.com>
> Sent: Sunday, August 27, 2006 10:20 PM
> Subject: Re: [Supras] Leaky head valley plugs
> 
> 
> > I've had to use a punch and hammer on the outside
> area
> > of the plug to break it loose before. That little
> > trick actually works well on broken bolts when
> > ez-out's aren't getting the job done. A nice
> soaking
> > with Kroil or some other penetrating oil is also
> > recemmended.
> >
> > hth,
> > Rockey 91T
> >
> > --- berniek at technicaldevelop.com wrote:
> >
> > > Hi list.
> > >
> > > Need some help this time.  Finally getting some
> time
> > > to work on the  JDM rebuild for '90 turbo. 
> There is
> > > evidence of he plugs in the head valley leaking
> > > coolant, but they won't come out, even with a
> 3/4"
> > > impact wrench.  The hex in one of them is
> distorted
> > > from all that torque to the point where it will
> > > never come out.
> > >
> > > So I had an idea:  Drill and tap the center of
> the
> > > plugs with 1/4-20 or 5/16-18 threads, and use
> large
> > > diameter fender washers, bolts in the threads
> just
> > > cut, and hand cut silicone rubber washers to
> span
> > > the distance outboard of where the plug OD is,
> so
> > > the silicone rubber sits on the casting.  The
> rubber
> > > will be soft enough to seal against the casting
> > > roughness.
> > >
> > > Any comments or ideas would be appreciated.
> > >
> > > Thanks.
> > >
> > >         BernieK
> > > _______________________________________________
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> > >
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> > >
> >
> >
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> 
> 


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