Section 3 (Specifications & Drive Belt Routing): Servicing
WARNING: This page is about a different car, the 2001 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
The coolant does not usually need replacing. In the case of larger repairs when coolant needs to be drained, new coolant must be used because the old has been exposed to oxidation and dirt. Clean the cooling system when replacing coolant. Use Volvo cleaning agent (Part No. 3979850), or equivalent. Fill with 50/50 mix of clean water and coolant.