Oil Mixed With Coolant In The Cooling System – Cleaning Tips

Oil Mixed With Coolant In The Cooling System - Cleaning Tips
Oil Mixed With Coolant In The Cooling System - Cleaning Tips

Engine oil mixed with coolant in the cooling system, is very common, after a blown or leaking head gasket.

So, you opened your coolant reservoir or the radiator cap and see that the coolant and oil have mixed.

Consequently, there is a really good reason that oil and coolant should ever mix.

Oil, is a lubricant that is used to make sure all the moving parts of your engine spin freely.

Engine oil mixed with coolant in the cooling system
Engine oil mixed with coolant in the cooling system

Coolant, is used to keep the temperatures of the engine steady and within a certain range.

In certain situations, cleaning the engine oil mixed with coolant; without removing all the cooling system components may be successful.

But, before you go any further, you need to find out, why this has happened. Next, you need to make all the necessary repairs to stop a repeat failure. So, there are some issues that are more common than others, here are some common causes.

Engine oil mixed with coolant in the cooling system
Engine oil mixed with coolant in the cooling system

Common Causes Of, Engine oil mixed with coolant in the cooling system

  • A broken or damaged head gasket, is the leading cause of the mixing of the two fluids.
  • Damage to the cylinder head is another main reason for the mixing of these fluids. A cracked cylinder head is usually, the result of engine overheating.
  • Damage to the engine block is uncommon. But, it too can lead to the mixing of fluid. A damaged or cracked engine block contains several movable parts (that use oil). Damage to the engine block, can cause Oil Mixed With Coolant.
  • Water entering the exhaust pipe or engine air intake can occur at times. It might be while driving your vehicle thru streams, rivers, or other bodies of water. Damage can occur if water enters your engine and causes it to hydro-lock.
  • Damage to a turbocharger or its cooler, can also result in fluids mixing.

Cleaning Tips For, Engine oil mixed with coolant in the cooling system

So, what you want to do is basically, an engine coolant flush without the harsh chemicals. A coolant flush, is also referred to as a cooling system service or radiator flush. Consequently, the process of adding a cleaner to the cooling system to remove, sediment, rust, or oil. Anything that can contaminate the cooling system, will have a negative impact on its function.

Engine Coolant Flush
Engine Coolant Flush

Follow These Steps, For The Most Effective Results:

  • Prepare a mixture of dishwasher detergent and hot water ( Some people will use a Vinegar mixture ). Use a rate of two ounces (dry measurement) of detergent, to one gallon of clean water. Also, make sure to mix enough solution to be able to fill, the entire cooling system.
  • Next, fill the cooling system from the highest point possible. Consequently, allowing for an air bleed to maximize the fill effort.
  • Start and run the engine, for a period of five minutes. Then, stop the engine and drain the entire cooling system.
  • Repeat this procedure with fresh solution, until all traces of Oil Mixed With Coolant have been removed.
  • After all traces of oil have been removed, fill the entire system again with clean water. ( Some people will use a Vinegar Mixture ). Start and run engine, for another five minute period.
  • Stop the engine and allow ample time for the water to drain completely from the entire cooling system.
  • Finally, fill the cooling system with a 50/50 mixture of antifreeze and clean water. Always, make certain to use only antifreeze recommended by that particular engine manufacturer.
  • Because, failure to use the appropriate antifreeze or coolant may result in engine component deterioration. Also, mixing incompatible coolants may also provide; undesirable cooling system effectiveness and result in failures.
Fill Cooling System With A 50/50 Mixture Of Antifreeze And Clean Water
Fill Cooling System With A 50/50 Mixture Of Antifreeze And Clean Water

Conclusion

So, coolant and engine oil are two completely different liquids. Both serve a different purpose, which is why Oil Mixed With Coolant should never happen. The reason behind it relies on both the liquids’ chemical properties. Oil is a thick viscous substance, while coolant is water like. Consequently, the engine relies completely on oil for lubrication which coolants and water cannot offer. Finally, that should make it clear that oil and coolant cannot go together.

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