Broken oil pump

Alan Roehrich · 11-01-2010, 11:17 AM

The only time we've had problems with a broken oil pump is when there is a balance problem (for example, a customer put an internal balance flexplate and/or balancer on an external balance engine, or the weight came off the flex plate). The Melling Select pumps are better pumps, and Melling just recently beefed up the base M55 casting. I've also had excellent luck with the Moroso blueprinted pumps. If you're spinning main bearings, you have some other serious problems going on, unless you accidentally made a pass after the pump broke and you had no oil pressure.

If you have a Fluidamper, find someone you hate and give it to them. Your clue that it (the Fluidamper) is going bad is the crank will break, or some other part will fail, such as the cam drive, and they all go bad because the viscous fluid fails and the internal weight welds to the outer housing (at that point it becomes a solid hub that is NOT balanced, and is not absorbing anything but your money). There's nothing wrong with ARP oil pump drives. Solid motor mounts will only cause a problem if there's a balance problem already, then they'll make it worse.

11-01-2010, 11:17 AM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,132 Likes: 1,600 Liked 1,912 Times in 429 Posts	Re: Broken oil pump The only time we've had problems with a broken oil pump is when there is a balance problem (for example, a customer put an internal balance flexplate and/or balancer on an external balance engine, or the weight came off the flex plate). The Melling Select pumps are better pumps, and Melling just recently beefed up the base M55 casting. I've also had excellent luck with the Moroso blueprinted pumps. If you're spinning main bearings, you have some other serious problems going on, unless you accidentally made a pass after the pump broke and you had no oil pressure. If you have a Fluidamper, find someone you hate and give it to them. Your clue that it (the Fluidamper) is going bad is the crank will break, or some other part will fail, such as the cam drive, and they all go bad because the viscous fluid fails and the internal weight welds to the outer housing (at that point it becomes a solid hub that is NOT balanced, and is not absorbing anything but your money). There's nothing wrong with ARP oil pump drives. Solid motor mounts will only cause a problem if there's a balance problem already, then they'll make it worse. __________________ Alan Roehrich 212A G/S