Q: I have brown goo in my radiator and there's brown on the cap

asked by on

I noticed the ac wasn't blowing as cold I checked the radiator and there was brown goo inside, and on the cap. There was coolant in the radiator along with brown stuff and no coolant in the coolant container

My car has 177000 miles.
My car has an automatic transmission.

Hello there. The brown sludge you are referring to is often caused by rust or breakdown of the metallic and rubber components that comprise your cooling system. It is common for this to occur when a radiator and coolant lines are more than 15 years old, so it may be time to replace the radiator, coolant lines and flush the coolant system to avoid obstruction issues and overheating.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have brown goo in my radiator and there's brown on the cap

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: Q: Cold Starting Problems

As a general rule, car engines do not like cold weather and do not do operate as well in cold weather. When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately...

Q: Q: Check charging System light

The most common cause for the charging system light coming on is going to be the alternator. The battery is going dead due to the charging system is not recharging it and battery will go dead. In order to properly...

Q: The truck will go in reverse fine, but at every stop the transmission acts like it's in neutral. I have to rev the engine to get i

A faulty shift solenoid, and/or internal mechanical faults that cause clutch slippage, will usually set a trouble code and the check engine light will come on. Check for stored trouble codes but if there are no stored codes, a scan...

Related articles

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...
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...
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.