Skip the auto shop - Our mechanics make house calls

Q: For some reason I am getting diesel fuel in my coolant to the point it makes it overflow.

asked by on

I blew the motor up in my 99 Super Duty I need a new motor so I found a used one on Craigslist and had some people put it in but now I'm getting diesel fuel in my coolant does anyone know how that could happen?

My car has 100000 miles.
My car has an automatic transmission.

Hi there. The engine that you go has a blown head gasket. The fuel is leaking from the combustion chamber to the cooling system and causing the diesel to get into the cooling system and make the coolant bubble out of the coolant reservoir. I recommend seeking out a professional, such as one from Your Mechanic, to help you troubleshoot the reasons for having diesel fuel in the cooling system.

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
  • Home
  • Questions
  • For some reason I am getting diesel fuel in my coolant to the point it makes it overflow.

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: Do I have a blown head gasket in my Chevrolet

Hello. Depending on where the leak is would allow me to determine if it needs a head gasket. I would need to know more about the vehicle to know where to go with it. If anything I would do a...

Q: what is an good oil change interval to stick with this car

Toyota recommends changing the engine oil and filter on the 1999 4 cylinder Camry every 12,000 kilometers. Changing the oil, and performing other maintenance, using a mobile service such as YourMechanic, can save you a lot of money. If you...

Q: p0303 misfire and p0269 balance fault

Hello, From my experience this means that the fuel injector for cylinder #3 is faulty,has dirt in it,damaged wiring,a loose connection or corrosion in the connector. It sounds like the moisture from the car wash is effecting the fuel injector...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.