Stan in Oly, WA
Well-known Member
We've had unusually cold weather here lately, with the possibility of nighttime temperatures in the teens (typical low winter temps are above freezing). I drew off some water from the cooling system of my old Nissan pickup, and it's rusty colored with visible debris in it. I'd estimate the anti-freeze content to be near zero (zero anti-freeze, not protected to zero degrees). I would flush the radiator, or even the whole cooling system, but I remember from years ago that flushing an old, poorly maintained radiator can cause leaking. I like this vehicle a lot, but it's near the end of its useful life, so there's not much upside to me to put much money into upgrading systems. Am I better off just draining the radiator and adding the appropriate mixture of coolant/water, or would it be reasonably safe to flush it to the extent of running a few gallons of distilled water through it?
Stan
Stan