by calling an HVAC certified technician. the freon lines must be pumped down(release to atmosphere is usually against EPA regulations) the lines must then be evacuated with an HVAC approved recovery machine.
Yes, engine oil and automatic transmission oil can both get into the cooling system.
You must break down the oil with detergent before flushing the cooling system.
oil in antifreeze is a sign of a head gasket leak, shut car down before major damage is done.
Low engine oil can effect the cooling system as it creates additional friction which may be difficult for the cooling system to remove. The oil is designed to both lubricate and cool the internal components.
Yes. If you are low on oil your car may run hot and even your radiator won't be enought to cool it down
It will take a few flushings to get all of that solution back out of the to be oil in the cooling system so it probably doesn't have a lot of oil removal capacity.
NO it will not, It has NOTHING to do with the cooling system whatsoever.
A broken piston ring can allow oil to get into your cooling system. A bad valve seal can also allow oil into the cooling system.
Cleaning, cooling, lubricating
Once you have determined and repaired how the oil got into the cooling system eg. head gasket , oil cooler, or turbo, you need to thoroughly flush out the cooling system with a chemical cooing system flush and plenty of water.
Your engines head gasket is blown. This means a cylinder will lose a little compression because gas can escape into the cooling system. Doing so forces oil into the water, and water into the cylinder when the piston is on the down stroke. This overheats your car puts extra stress on your cooling system because it becomes even more pressurised (you will need to top up the cooling fluid very frequently because of this). Get it fixed as soon as possible before you do more damage to the cooling system or the engine. Your mechanic will know that the oil and water in the car will also need to be flushed once the head gasket is replaced.
Sometomes it is hard to get all of the oil out of the cooling system. However the place that replaced the engine should flush the cooling system until it is clean. Also if your car has an engine oil cooler , it could be the cooler in the radiator and not have been the engine in the first place.