ALso check your pump to gear housing gasket, and your timing pin O-ring- I've had each of them leak, profusely at times. You can reseal the PS/vac pump with Ultra Black Silicone sealer. It has worked for a week and a half in mine. Pump gakset was leaking, and I had to tighten up two nuts- I put the gasket in two weeks ago or so.
Daniel
Daniel