Edit.....

It was the oil return line..... Thanks for reading...

Tim

 

Check this brass fitting out, on mine it has a slight oil leak, (not as bad as yours)I'll be sorting mine out next week when the blower comes off.





Edited to say that might not be the one.

There is a brass blanking plug around the bottom of the blower.

 

Is this a matter of just tightening it? Or should I send it back to Comptech?