sounds like a leaking head gasket have a pressure chek done on cylinders and cooling system
I assume you want to change out the water pump and would like to know if you can do it without draining the radiator. You will lose approximately all the coolant in the radiator reservoir when you remove the radiator hose from the water pump. If the coolant is in good, clean condition, it might be wise to drain the radiator into a container and re-use the coolant.
it looks like a radiator with coolant in! it should be red.
sounds like blockage in the cooling system. See if you are not low on coolant in the radiator. Just because your reserve tank has coo;ant does not mean that you have enough coolant in the radiator. If you have low coolant in the radiator, it will blow cold. It can happen abruptly. If you are low on coolant in the radiator and not in your reserve tank you will need to find out why the system is not pulling coolant out of the reserve tank.
Get something for the coolant to go into like a bucket. Remove the lower radiator hose from the radiator and also remove the radiator cap to help and drain into bucket.
This sounds like bad news. The coolant could be leaking into your engine and mixing with the engine oil, then cooking off. A simple test can tell if there's water in your oil.
When mixed with coolant in the radiator it tends to look like a chocolate milkshake.
A specially designed Radiator Cap makes the radiator pressurized. The caps releases the extra pressure and expanded coolant into a small tank, and sucks the dispelled water back in the radiator when the engine cools condensing the coolant. This guarantees no loss of coolant and saves you from checking and refilling the radiator daily like the old cars without pressurized radiator. Newaz.
it sounds like its clogged.
sounds like water pump.check radiator hoses as well
try taking out the thermostat and have you put to much oil and coolant in the radiator
Sounds like you need a radiator coolant flush or you need a bigger radiator for your vehicular transport thingy.
it sounds like your coolant over flow tank is leaking. it is a common problem with these cars. might also check your radiator for leaks or your exhaust for coolant, but if there is coolant in your exhaust that would mean blown heads