Skip the auto shop - Our mechanics make house calls

Q: Coolant

asked by on

Coolant reservoir smells and looks like oil inside, but the oil looks clean. Car has yet to overheat and no visible leaks on the ground. Only place coolant has leaked is through the cap which I replaced but still at some points still leaks through there. Any ideas what the problem could be?

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

A: Hi there: One of the common problems with ...

Hi there:

One of the common problems with other vehicles like you're 95 Cougar is that the overflow coolant reservoir can collect mold and fungus over time; especially if water has been used in the past instead of straight or pre-blended coolant. This is most likely what is the clear oily looking substance. The only solution here is to replace the coolant overflow reservoir as well as the coolant lines leading from the unit (as they also might have mold inside them).

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

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: I think it's the radiator

It would not be advisable to drive the vehicle or further engine damage may occur. If you drive the vehicle and overheat the engine even once you could cause the head gaskets to leak or seize the motor. The cost...

Q: Gas leak by rear tire

Hi. A gas leak is never a good thing and it needs to be repaired right away. If it is leaking near that tire, then the leak is typically in the filler tube. Typically, if it was the tube, then...

Q: Muffler not working.

Hi there, It very possible the catalyst in side the catalytic converter is braking up inside of the catalytic converter. This could cause a rattling noise in the exhaust while the engine is running and a possible smell from the...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...