Great replys everyone. This site continues to be AWSOME! Greeleaf, it is at the top in front, approximately 10mm hex nut on the pump facing the gear cover. I have tightened it with a small center punch a year ago when it leaked. It had stopped until a week ago. I did not want to tighten any more, afraid of stripping it. I have 187,500 on this engine. Thanks again for all the angles... What is a 3200GSK? Patrick.