Seal for Machined PSI to hat?

I had my PSI machined on top so there is not a groove for an 0-ring. Taylor doesn't make a restraint plate with an o-ring groove. Can I just seal it with silicone? I have thought about having PSI machine a groove in it for me.

C

 

Seal

Just use some permatex "The Right Stuff" on the faces. Just a lite film, that stuff is wicked. Once it sets you can almost take the bolts out and run it. It should work fine.

 

as long as it is all flat right on

 

seal

Use HYLOMAR , it's sold by Permatex. It is not cheap, but can be found on a Permatex silicone rack in some places.
Most people won't buy it because they don't know what it is. It is the small tube size for $4.95, while all the different color silicones are $ .99, so a lot of places quit stocking it.
In the early 1900's we were having sealing problems on the Donovan between the blower/manifold which of course lost boost. An aircraft guy loaned us some (at the time it could only be had for Rolls-Royce engine rebuilding), we had doubts and didn't richen it up.......burned all 8 !!
Use it on your diff center to housing also.

 

Bob also great stuff for sealing the oil return holes doesn't leak like silicone does. Mike

 

Hylomar does not creep like silicone. It is the best.