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Old 04-03-2012, 03:53 PM
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Problem with new oil pump (sbc)

I just installed another oil pan and changed the Melling Select HV oil pump (10550) for a Melling Select stock volume (10553). Now everything is back together, I just went to prime the pump using a priming tool and the pump is noisy and the shaft doesn't turn smoothly. I removed the priming tool and stuck a flat blade screwdriver on the end of the oil pump drive shaft and I could feel the jerkiness in the shaft as I turned it with the screwdriver. It was generating healthy pressure for the brief time I ran the drill with the priming tool, but obviously something is definitely not right. It's worth noting I did turn the shaft before installing the pump and it was perfectly smooth. I also had the cover off to change out the pressure spring. Anyone have any ideas?
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