I had problem with engine oil pushing out ps reservoir. I replaced p.s. pump seal . I started truck yesterday without ps pump on and is oil is running out compressor as I expected. Is this normal or is there also a seal in compresser? I would of thought seal in ps pump should prevent ps fluid from pushing out but is it for both? You would think a seal is designed to hold pressure in one direction. I installed the seal with spring/open lip in , flat side towards compresser so not sure how well it will hold engine oil back.