View single post by redracer
 Posted: 04-30-2020 09:46 pm
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Joined: 09-10-2012
Location: BROOKHAVEN, Georgia USA
Posts: 517
The early cam housings had an oil drain hole in the back, which was "plugged up" in the later housings. They felt it necessary to leave oil up there so there would not be gauling of the cam bearing surfaces during start up, one of the most damaging cycles of an engine(Smoket Yunick was of the opinion that all cars should have a pre-pressure system to relive this "oil starvation" part during start up.
So, to answer your question, it would probably NOT be a good idea to put a drain hole in the back of the housings.
On another note, yes you can get a leak free engine but proper preparation of the components as well as proper sealing compounds are necessary(personally, I seriously dislike silicone seals, as they are VERY VERY ineffective)