The water pump is emitting a strong buzzing noise.
The water pump is emitting a strong buzzing noise.
Have you verified the other D5's for any issues during an unrestricted test loop (such as a bucket)? How are the D5's secured at the bottom of your case? Are there any unusual noises or signs that the mounting screws might be becoming loose?
This would eliminate any direct metal-to-metal connection. If you possess the other D5's, it may be worthwhile to verify whether they continue to produce that sound.
I was forced to return my other item for the warranty exchange.