Yeah...give it time and as long as it shuts up don't sweat it. A friend has maybe the same pump that has been making a loud noise all season...started last season. My brain says it should have died long ago as no bearing or seal should make that much noise and last. However...other than the obnoxious noise it's still going strong. In late Fall and early Spring before I de-winterize I use an old Jacuzzi pump jury rigged to get the jump on circulation and also use it to pump stream water any time I need high volume flow for filling or whatever.
Al