noise

I have an Eheim 2028 that I bought used. Worked great, but this morning I noticed a grinding noise. I took it apart and found that the impeller was hot, so I cleaned everything out, but it's still noisy. I think I need a new impeller. Anyone got one they don't need? Otherwise, looks like...

uuggggghhhhhh... my 350 b just recently started making this annoying noise..i have checked online about this, and tried to just leave it alone.. it did stop..now it just came back again.. and this time it did not stop the whole day.. its now sitting unplugged.. is there a way to fix this? or is...