Get one or two quart bucket. Remove pan. Run drill with bucket full of
oil under pickup and a big drain pan under engine. While pressure is at max, look at leakage rates. There should only be heavy drips to small streams coming out of bearings. If you see a large leak pooring out
oil then find where it is comming from, etc. Those pumps flow a lot of
oil so it would have to be a big leak. You can buy an adjustable pressure pump from Melling (racing style pump),