Barnhart wrote:
 >
 > Paul,
 >
 > The dimensions for the outer TEC O-ring is 35.31". The inner is

28.625'.

 >
 >  Is this inner or outer diameter?
 >
 > Barny

On the other hand, I reuse the outer water "O" ring over and over again.

It

gets too long so I cut through the ring on a steep angle. Put a bit of

pure

GE silicone tub caulk into the groove and press the ring into the

groove.

Match up the angle of the cut and trim off the excess. Put a dab of

silicone

over the joint. Make the joint on the center top of the engine. It won't
leak, but if it ever did, you could see it on the top of the case.

The silicone also keeps everything together during assembly.

For the inner (Compression) ring I use the stock ring, or 18 gauge

Teflon

covered aircraft hook up wire. Again with a very tiny bead of silicone

in the

groove. The joint should be even with the intake port. Another dab of
silicone over the joint. For bridge ported engines, I take a sharpened

punch

and stand up a burr in the floor of the inner groove to prevent the "O"

ring

from oozing into the "J" port. Again, a drop of silicone at each end of

the

ring and along the remaining aluminum rib to keep the water out. Bill

Koch

runs in GT-2 with a 13B, and he just uses regular 18 gauge hook up wire.

Not

even Teflon. The silicone is the trick. After the case bolts are

torqued,

squirt some oil into both housings and turn the engine over a few times.

The

silicone scraps will come out the exhaust port. No leaks yet, since

1980.

   I think a "J" ported 20B would be right at 300 HP at 6,500 RPM. I

sure

would like to build one of those.

Lynn E. Hanover

George Lendich wrote:

Lyn,
Given we use slightly different descriptions for things, what is Teflon
covered hook-up wire. Sounds good and cheap - do you over lap the wire at
the joint. I'm a great believer in silicone as well.
George (down under)

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