How to Install a High Press Spring in a Small Block Oil Pump

RustyRatRod said
moper said they come with the HP spring. I've never seen one that did OTHER than the Melling HV pumps MP used to sell marketed as high pressure and high volume. MP would take the Melling pumps, disassemble and clearance them then install the high pressure spring package and rebox them as MP HV/HP units. Used many of them through the years. If the regular Melling HV pumps had the high pressure springs in them, it's news to me. Evidently Mopar Performance didn't think they did.

As far as I know the HV Mellings and MP are just the "stock" spring. You have to buy the high pressure spring and install it in the HV pumps. I've been doing it for years...

The guys at Mancini never stop me from buying the spring when I get a HV pump. Art and Tony would have told me if I didn't, they wouldn't do me that way and they knew their parts. They worked there for many years, and the guys today don't either.... I swear that there have been months that I've spent enough in there to cover their electric bill. LOL!

We need to research and find out for sure....