What would cause radiator fluid to have a brownish milkshake look it?

When oil mixes with coolant, it creates a brownish milkshake-like substance. This is because oil is not soluble in water, and so the two liquids will not mix together properly. Instead, the oil will form small droplets that will float around in the coolant. These droplets will give the coolant a brownish color and a milky texture.

Causes of oil in the coolant

There are a few different things that can cause oil to get into the coolant:

* Blown head gasket: This is the most common cause of oil in the coolant. When a head gasket blows, it allows oil and coolant to mix together. This can cause a brownish milkshake-like substance to form in the coolant.

* Damaged oil cooler: An oil cooler is a device that helps to cool the engine oil. If the oil cooler is damaged, it can allow oil to leak into the coolant. This can cause a brownish milkshake-like substance to form in the coolant.

* Cracked cylinder head: A cracked cylinder head can also allow oil to leak into the coolant. This can cause a brownish milkshake-like substance to form in the coolant.

Symptoms of oil in the coolant

In addition to the brownish milkshake-like substance in the coolant, there are a few other symptoms that can indicate that there is oil in the coolant:

* White smoke from the exhaust: Oil in the coolant can cause the engine to produce white smoke from the exhaust. This is because the oil will burn when it is mixed with the coolant.

* Engine overheating: Oil in the coolant can cause the engine to overheat. This is because the oil will clog up the radiator and prevent it from cooling the engine properly.

* Engine knocking: Oil in the coolant can cause the engine to knock. This is because the oil will damage the bearings in the engine.

What to do if you find oil in the coolant

If you find oil in the coolant, you should take your car to a mechanic immediately. This is a serious problem that can damage your engine. The mechanic will be able to diagnose the problem and repair it.