Someone will have to explain how that fixed your problem. I was under the impression that the crancase was vented to atmosphere in which case it cant be vapor locked. Glad it worked but I dont see how.
You may have somehow starved the top end of oil (lifters ticking) but to call it vapor lock is not a correct diagosis. Gas will vaporize under heat and pressure but I have never heard of oil doing this. Anyway, I hope the problem is corrected.