Fred Osborn wrote:

Paul,

The water o-ring grooves in my 87 13B housings have a rough surface,
appearing to be heavily corroded. Is this normal ? I had expected to see
a groove with smooth machined bottom and side surfaces. Is the Hylomar
expected to seal an o-ring clamped in such a rough groove or are my
housings only suitable for use as boat anchors ?

Fred O.

The O rings alone will work if the slots are well cleaned.
You might try steel wool to polish them a bit.
This is the kind of attention to tiny details an overhaul
on a rotary requires.

O-rings cannot be glued in with anything as they need to move
to work properly. Apparently Hylomar never really sets up 
hard so apparently it is OK to use it.

Don't forget to look at teflon encapsulated O-rings from Creavey.com
By now Jeff Chrysler at Creavey will know the exact sizes needed.
http://www.creavey.com/

These O rings are good to 500 degrees F and give an extra margin
of safety in the event the engine is inadvertently overheated.
That has been known to happen many times as we go through the
cooling system development process.


Let me know if you are interested in going this route as we have lots
of data on the subject.

Paul Lamar
 
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