New Fuel Pump - Defective???

[jwbavalon]

Hi all,

I'm after the collective wisdom of the group. My '91 318is fuel pump was making the usual whining noise so I installed a new pump.

The new pump is twice as loud as the older pump. It is not a whine but sounds like a high speed pump twice as loud as the old pump. Even with the tunes on, the pump drowns out the songs.

The new pump was installed with a new O-ring and it does not leak gas so I assume it is installed correctly.

Any ideas or does it sound like a defective pump?

Thanks