Skip the auto shop - Our mechanics make house calls

Q: Found oil in the water reservoir

asked by on

I found transmission-type oil in the water reservoir. Does this mean a transmission problem or a radiator problem?

A: Generally a pink milky fluid in the coolant...

Generally a pink milky fluid in the coolant indicates a leak between the transmission cooler and radiator. It is very possible the radiator has failed. Both the coolant system and transmission should be flushed to prevent cross contamination of fluids and the radiator replaced. Please note: never open or service the engine cooling system while the system is hot or pressurized or serious injury may occur. You may want to enlist the help of a mechanic who has the expertise and training to replace the radiator and service the necessary fluids. A certified mobile mechanic from YourMechanic can inspect the cause of the leak at your home or office.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: On a good day car starts very easily in the morning or if rested for about 30 mins. However, it does not start when warm

Hey there. This is a common sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted as the copper beneath them expands and contracts faster than...

Q: Car tries to turnover but won't start

Hi there. If your car is not turning over, despite a new battery and a jump, then it is probably not a battery problem. It may be possible that there may be a problem with the vehicle's starter, or starting...

Q: Oil leaking out

I would ask for help from a mechanic at YourMechanic. They can come to you and properly diagnose your oil leak.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...