I am unclear on the effects of sitting on coolant. Are the corrosion inhibtors consumed by time, or my by miles (heat, greatly speeding reactions)?I plan on flushing the system and getting in wholly new coolant (or maybe only d/f). Here's the history as far as I can piece it together (prior owner not available so going on records I can find/stickers).
2004 Volvo S60 2.5t awd, 133k on it now.
111,000mi in 2011, timing belt change (has factory Volvo coolant in it, likely installed then - done at Volvo dealer)
125,500mi, 11/2016
133,000mi 10/2020, I believe it mostly sat from ~12/17 or shortly after until 9/2020.
So the coolant, which is OE Volvo blue, appears to have last been touched with the timing belt in 2011, 22k miles ago/9 years.
Flushing this is apparently a little tricky with a high likely hood of breaking the radiator and block tap plugs (replacements available), also introducing air into the block hard to clear. OTOH, cooling issues with these can lead to HG problems and I want to be careful with the coolant health. Can I test the anti-corrosion properties effectively, or should I just do a radiator drain/fill to minimize hassle. I was going to use Peak 10x for the corrosion protection qualities (it's compatible).
By the conventional wisdom on Volvo forums (Volvo itself is mum on coolant interval on these) - 5/6 years and 60k. So it's three years over due by the clock and 40k under by mileage.
2004 Volvo S60 2.5t awd, 133k on it now.
111,000mi in 2011, timing belt change (has factory Volvo coolant in it, likely installed then - done at Volvo dealer)
125,500mi, 11/2016
133,000mi 10/2020, I believe it mostly sat from ~12/17 or shortly after until 9/2020.
So the coolant, which is OE Volvo blue, appears to have last been touched with the timing belt in 2011, 22k miles ago/9 years.
Flushing this is apparently a little tricky with a high likely hood of breaking the radiator and block tap plugs (replacements available), also introducing air into the block hard to clear. OTOH, cooling issues with these can lead to HG problems and I want to be careful with the coolant health. Can I test the anti-corrosion properties effectively, or should I just do a radiator drain/fill to minimize hassle. I was going to use Peak 10x for the corrosion protection qualities (it's compatible).
By the conventional wisdom on Volvo forums (Volvo itself is mum on coolant interval on these) - 5/6 years and 60k. So it's three years over due by the clock and 40k under by mileage.