Originally posted by CrazyCars
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That's Great news! I have been following this thread with intense interest. I did a in place overhaul on my truck way back in 1975. As ignorant as I am now, I was at least ten times more ignorant than I am now and still have a long way to go. In addition, I also spent years specifying and applying pumps in various applications. Automotive oil pumps are generally one of the most precision made and durable components across the totality of the industry (with some few exceptions). I can't think of any of them with unnecessary parts. Our oil pumps are basic gear pumps. The clearances in the pumps, and the space of gear meshing determines volume of intake and outflow as the pump operates. It could be that missing thrush washer causes one gear to slide out of place and affect the pumping action. This is complete theory on my part because I have not studied the components thoroughly. That's why I was hoping one or more of our professional mechanic members (I'm certainly not one) would speak up with a credible explanation of how you could be having this problem , unless there is some kind of horrible hack job by the machine shop who did your rebuild.
Get that oil pump back together properly and let us know. I am very interested in the outcome.
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