Rotrex SC Failure

Originally Posted by pokeyl

55K miles 6 years oil change every 2 years.

Problem could be cooler location and poor air flow, running an undersize pulley, or I popped off a oil line 5 years ago at cruse speed turned off the engine, reconnected the line and added oil. Unit was fine until last month. Now its is very loud, still makes boost. One user at the BMW group has had a loud SC for 4 years...

I will be relocating the oil cooler with the new unit. i went up to the C38-91 this time and will go down in pulley size. I get all my parts from URDUSA.com.