Im sure its been done before by someone thinking they were successful at having done it. You are just introducing an element into the equation that can or could have catastrophic consequences should it break loose and enter into the oiling system. And im not saying that in the right circumstances, that someone that takes care and doesn't apply excessive amounts of some kind of sealer will have any problems. But once you insert the pickup tube into the body of the pump, you cant really tell if extra has oozed out(internally) and can be in direct contact with the oil as if flows through the pump and be a potential problem....
