Installing the oil pipes
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Install the lower pipe. Use a new O-ring, tighten to 30 Nm .
Install the upper pipe (return line) with its mounting in the control system cover.
Install the connector loosely. The pipe cap nut is tightened later.