Skip the auto shop - Our mechanics make house calls

Q: What would cause oil to get into the coolant?

asked by on

I had a mechanic run straight water in the cooling system and there was no oil. As soon as we added antifreeze oil started to show up again. The car is also overheating and we cannot figure the problem out. Can you help?

My car has 78000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. A cracked head gasket is the definite answer to your question. You will need to fix this as soon as possible. It is detrimental to the running of your engine. Here at YourMechanic, we can have a technician come to your home or office to inspect this issue and confirm a diagnosis for you, and make or suggest the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. What would cause oil to get into the coolant?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Loud metallic clicking noise from engine

Hi there. If there is a grinding noise when trying to crank the engine then most of the time it is caused by the starter failing. If the starter gear is not engaging correctly then this will occur. It is...

Q: I am adding refrigerant. I need to know the low side pressure if the ambient temp is 95 deg.

When the A/C compressor is running, the low side pressure should be between 20-40 PSI. There is no spec for A/C pressure when the system is off though, rather they just specify a specific amount of refrigerant that should be...

Q: Car running hot even though I added antifreeze

The cooling system on this car has more than one problem that are common. The radiator clogged, thermostat and the cooling fan are the top three most common failures on the vehicle and would need further diagnostics to narrow the...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.