Coolant is brown?!

[ThatSNninety5]

Havent posted on here in a while because the car has been good, but ive noticed that for some reason my coolant is brown even if it add fresh coolant. What could cause my coolant to be brown? Rust in the cooling systems? or is this just something that happens over time? any suggestions would help, should I do a complete coolant flush of the whole system and add all new coolant and see if it turns brown and if it does, again, what could cause this?

 

[96blak54]

Probably gonna need a water pump and a coolant flush.

Water pump impeller will rust out, brown the water.

 

[ThatSNninety5]

Probably gonna need a water pump and a coolant flush.

Water pump impeller will rust out, brown the water.

So Ive also noticed my engine bay does get quite hot as well, but its not from the car overheating because the coolant is still doing its job, but with the coolant being brown is it possible its not letting the engine cool properly causing my engine bay to get pretty hot?