In Reply to: MORE canister talk posted by Nick R. on August 04, 2001 at 01:05:37:
I did take apart the valve completely. Had to use a dremel with a carbide bit to grind off the four spots at which the retainer ring was peened into place. Even then I had to grind off the wall of the ring to remove it.
A stronger spring will not help. The valve body is plastic (or phenolic?) and it has a beveled face that seats against the metal and seals the oil. On mine, the body had wear on the bevel that indicated it had been rocking slightly, eventually leading to sufficient rounding off that it could never seal adequately.
The solution is to make a new valve body and insert it. A new retaining ring could also be made but by the time you pay the machining costs, including re-cutting the metal seat, you're approaching the price of a new canister. And I have nightmares about metal chips remaining in there that happily float out when the engine's running.
Of course, it would help if the new canister lasted more than a few months. Grrr!
Let us know what you find on yours.