u/Jolly-Might-903

The is a browish precipitate in the coolant reservoir, I am not sure if this is rust, oil or sludge from mixed anti-freeze. Dip stick looks fine, and there is no smoke from the exhaust. There is however some amount of coolant leaking for a couple of months now. The brown precipitate in the reservoir looks like this after the car been sitting, water is above it.