A very frustrating situation can arise where either the engine oil or automatic transmission fluid finds its way into the cooling system and mixes with the coolant solution.
This can happen through the following;
Leaking cylinder head gasket
Cracked cylinder head
Faulty engine oil cooler
Faulty transmission oil cooler
Human error (pouring engine oil into the coolant reservoir or expansion tank)
Removing oil from the cooling system can be a very difficult task to accomplish and it is one that requires a lot of patience and perseverance.
Luckily, commonly available dishwashers are very effective for getting rid of oil from the cooling system.
Before starting this cleaning process, ensure that the cause of the coolant and oil mixing is al..