I have a 2001 S80 Non-Turbo (2.9) and wanted to post a comprehensive update to this after changing the heater core for myself and spending close to 1 1/2 hours searching various sites and postings for instructions. It took me about 6 hours all together but I could have done it in 2 hours if I knew s...

DIY: 2005 XC90 Heater Core Replacement - 2005 XC90 2.5T with 109K miles. - Heater Core did not leak but only put out 145F at center vent (heat max, tach at 2500 rpm cruising speed). - After replacement, the center vent reads 160F (heat max, tach at 2500 rpm cruising speed), so I am ready for winter...