WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Pouring Oil Into Funnel And Oil Cooler
Courtesy of VOLVO CARS OF NORTH AMERICA.
Pour oil into the funnel and allow the oil to flush through the oil cooler.