Until an expert improves this answer with the actual Chemistry reasons, I submit the following opinion. The colors which are added to anti-freezes, and oils and gasolines, are put there to indicate differences. The intermixing of different colored anti-freezes IS NOT RECOMMENDED because they have different characteristics, and are NOT COMPATIBLE. The practice will not, probably, cause immediate engine problems, BUT OVER TIME, will definitely result in degradation of the internal surfaces of the engine, and the entire cooling system. Therefore, don't intermix different colors of anti-freeze.
Engine coolant expands when heated. Heated coolant needs a reservoir to come and go as needed.
Go to autozone & buy a $10 guage, Open the radiator when cold, Fill guage up with coolant & just read the level on the guage.
Drain and properly dispose (recycle) the old coolant. Put one bottle of Radiator Flush(from am auto parts store)in the radiator and refill with water. Run the car a idle(leave the heater ON to flush the heater core)for approx. 5 minutes. Drain and properly dispose of the flush liquid. Refill radiator with 50/50 mix of coolant and water or all premixed coolant.
Purchase a flush kit and new coolant from your local auto parts store and follow the directions in the kit.
your local auto zone or other parts store should have somthing you put in your radiator to plug it but this is only temporary if the hole gets any more than somthing like a pinhole you will have to replace the radiator
You use a tool called a coolant tester to check the mixture concentration. They are available at any auto part store.
Drain plug is called a pepcock. it is located at the bottom of the tank part of the radiator. To fully flush a radiator, you need to buy a flush kit. You can get it at any auto store. instructions are in the package.
Your anti-freeze is a Dex-cool anti-freeze. It is not compatiable with the green kind. It is a long life coolant which can last up to 100,000 miles. If you have to top off, do not add water as this coolant comes pre-mixed. Is there red fluid on top of normal coolant? If so you have a leak between you radiator and auto tranny cooler.
According to Advanced Auto Parts the Thermostat is located on the lower radiator hose at the engine. Thanks, Kit
Oil mixing with coolant? Coolant mixing with oil? Run engine to normal operating temperature, remove oil dipstick and let a drop fall on hot part of engine - oil will smoke coolant will "sizzle" White smoke from tail pipe when engine is at normal operating temperature? Engine misfire from 2 adjacient cylinders?
Low coolant? Water pump not circulating coolant?\ Plugged or restricted radiator Defective radiator cap? Thermostat not opening fully?
it is one of three things bad radiator bad water pump or bad thermostat