[Supras] Leaky head valley plugs

[Rockey Fox]

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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