Help with differential cooler setup

[eastsideM3]

Looking for some insight as to what was used on the driveshaft for a pulley for the pump. Adding the pulley would lengthen the driveshaft so Im curious as to how this was accomplished on the early Alpina E9 race cars. Thanks!

 

[mbmw]

The pulley is pressed on to the modified left stub axle on the differential. The pump is mounted on the two 12mm bolts to the differential. I will try to post a picture later on.

 

[roundel]

The V belt pulley is pressed onto the output shaft where the dust cover would be....

 

[mbmw]

 

[mbmw]

 

[eastsideM3]

Anyone have a diff prepped for sale?

 

[Thomas76]

I had not heard of these, just made E9 history a little cooler to me. Pun intended.

 

[sfdon]

Think hard about where the oil radiator goes- race cars didn’t have stock exhausts.

 

[roundel]

View attachment 199351

Unusual to see the pump mounted there,usually it was behind the driveshaft.