oil pump woes

[bmwstudent]

Back in May my oil pump went bad and I replaced with one I had on another motor. The new pump worked well for the past three weeks and now I'm having the same symptoms. Loss of pressure at idle once the engine is warm and I have aluminum in my oil. Oil looks silver. I always keep my oil full and i change it regularly. I use rotella 15w40. Any ideas why it is eating oil pumps?

[SpecM]

its probably bearing material, not the pump

the engine just very well be worn out

[bmwstudent]

i took apart the first pump and it was scored heavily, especially the bottom plate. I'll be pulling the pan and dropping a main cap to check this time.

[jlevie]

That isn't aluminum, it is bearing material. Don't bother to pull the pan. Pull the engine and rebuild it or replace it.

[bmwstudent]

well there you have it, thanks to both of you. i just picked up a b25 with 91k on it. I'll be rebuilding it before it goes in.