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: Blown head gasket? 2000 VW Golf

Hello - yes, this bubbles in the coolant reservoir could indicate a blown headgasket. There is a specific test which determines if the bubble in the reservoir contain combustion gases. This would confirm a blown headgasket. Checking for low compression...

Q: Turn ignition on fuel pressure goes to 60 lbs two seconds and fuel pump relay clicks pressure drops 5 lbs then slowly drops to 0to

It sounds like this fault may have more going on than just the fuel delivery issue. The vehicles ECU will command the fuel pump to turn on normally when a vehicle is started. If the car only primes for the...

Q: Early 6.7Ls..Do they really have Turbo problems?

This is a question that will vary widely depending on who you ask and is often times subject to bias. With that being said, however there are some commonly known problems (as with any new model car or truck) that...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.