That does not sound good . Should the pump be pulled and checked for internal problems at some point in time ? I would hate to have one come apart and wipe out an engine .
I was looking at a very rough 87 SDL locally, had 300K on it. It sounded like a worn Deere, have never heard a diesel that noisy . Made enough strange noises that I could not pinpoint anything;did not persue buying it as it looked like trouble .
Thanks for info .