2004 s60 turbo. Has leaked coolant since I got it 3 years ago and getting worse. I add about a qt per week now. No visible leaks. Had mechanic put dye into system and cannot find any leaks. He suspects system not circulating properly, building pressure, and pushing out over flow (more on this below)...

cn90 wrote: ↑23 Nov 2018, 22:30 DanaT,

- Use Wahler, but see my DIY, you can swap only the thermostat and ECT.

- Your heater core is probably bad. Use only Volvo or Behr (about $100 at FCPEuro), very easy DIY.

Do you have a link for your video?

Hi there, try first this easy test to see if the stat would be stuck open www.youtube.com/watch?v=gQxQnuU22Ow An inexpensive brand may fail in a short time. Secondly, when you say water temp 120F, is that measured with a code reader or at the vents? If it's a real coolant temperature measure, then ...

For your 2006 2.5T it is required that you change the entire thermostat housing when replacing the thermostat. It is only offered as a whole unit from Volvo. You might be able to get it off and apart from the car, but once you do, there is no way to get the thermostat by itself. It is only offered ...