Paul:

Thanks for adding me to the mail list.

I like the way you have solved the problem with the water pump castimg.

I want to add a small holding tank with the radiator cap on the tank.
Problem is that the tank top will be abiut 1" below the top of the water
jacket.

Will keep you informed of my progress if you are interested.

Hank

A holding tank is OK but I think it is not necessary. An overflow tank
however is essential. The antifreeze solution expands when it gets 
hot and the pressure rises above the cap pressure. The pressure relief 
valve in the cap opens up. The solution needs a place to go so it goes 
into the overflow tank. When the engine cools off and the fluid in the 
engine contracts there is another valve in the cap that opens up and 
the engine sucks all the solution back out of the overflow tank and 
back into the engine. 

The overflow tank can be almost any height in the cowling. There is no 
pressure in it so it can be lightly made. The cap of course must be 
kept in working order. Sophisticated little bugger for being so 
cheap.

We are always interested in what people are doing with rotaries.

If you need more pictures on a step by step on how to modify the pump
let me know. 

Paul Lamar
 
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