I have took off water from coolant and look it that pic.
later I will send another photos because there are more like this .I will tell you how I took off this **** without removing any thing.
You shouldn't need to add antifreeze every year; it should last longer than that. - Mine is normally still green when I change it.
I just meant that the brown colour may not be rust or other corrosion, it might just be that someone has tried to fix a slow leak somewhere and that's the gunk that is supposed to plug it.
why keep telling me warning "check coolant level" all time even in cold start up. I test it by removing sensor from coolant from the hole then start up the car and the light doesn't come on .when setup again in hole of reservoir and car start up it shows again message.????
The crud has probably gunked up you your level sensor. Hence why the warning keeps coming back. Probably best to flush the system a few times before adding fresh coolant.
Hmm, not sure what that will do for the gaskets and hoses etc! Think you'd better go out and buy some radiator flushing solution from either a motor factors or Halfords!