If the engine overheats the head gasket blows up and causes oil to leak into the coolant system.Ĭracks In The Engine Block: If you are inspecting your engine and find cracks in your engine block, you will need a new one. The purpose of the head gasket is to create a seal so oil from the engine doesn’t leak out and the air pressure stays at the correct level.
If you notice oil is in your coolant, you should check the oil cooler first to see if it is cracked.ĭamaged Head Gasket: The head gasket is a rubber seal that is right between the head and the engine block located in your engine. This part is fairly easy and cheap to replace and is a pretty common cause for oil leaking into coolant. When a crack occurs, the oil will start to leak into the coolant. Sometimes the oil cooler cracks due to overuse or age. Let’s go into detail on the different causes of how oil gets into the coolant so you are aware of why it happens and how it can be avoided in the future.įaulty Oil Cooler: Most modern cars have an oil cooler fitter on the car. It is not normal for oil to be mixed in with the coolant and this could lead to serious problems if you don’t get it checked out. You need to seek immediate attention for your car. If you are doing a routine check-up and open up the coolant reservoir to find oil is mixed in there, you have a big problem.
The oil and the coolant are stored in different areas.
