Herein, what does oil look like with blown head gasket? White or Milky Oil As coolant leaks into your combustion chamber, it will seep past your piston rings into your oil. Over time oil and water will mix and cause the oil to turn a milky white. You can look for this on your dipstick and around your engine oil cap.
What does a blown head gasket sounds like?
If the head gasket fails in such a way it allows the compressed air/fuel to escape, the compression of that cylinder is reduced. This loss of compression results in a rough running engine and a notable reduction in engine power. This sort of failure typically is accompanied by a sound like an exhaust leak.
Does a car overheat with a blown head gasket?
Engine Overheating
See, head gasket leaks can be caused by an engine that's overheating. But since the head gasket keeps coolant flowing properly through the engine, a head gasket leak will often make the engine overheat, too.
Why is my oil milky looking?
Milky oil on the dipstick can indicate an engine problem. A leaky head gasket can allow coolant to pass into the oil system. When coolant and oil mix, or attempt to mix, the result is oil that looks milky. However, this can also be caused by a collection of moisture created by combustion.