Skip the auto shop - Our mechanics make house calls

Q: After replacing many cooling system parts on my 2000 Plymouth Grand Voyager there is residue in the cooling system and a leak

asked by on

We just replaced the radiator, water pump, thermostat, heater core and hoses (all new parts) because our van was overheating and had transmission fluid in the radiator, but now there is brown stuff in the radiator and a stream of water ( Pen size stream) is leaking (which it wasn't doing before)

My car has 199086 miles.
My car has an automatic transmission.

Hello. If there was transmission fluid getting into the cooling system previously then it will take some time to get that oil out. It may take several flushes to clean it as long as there are no other issues. As for the leak, the only way to know where the leak is coming from is to pressurize the cooling system. Once it is pressurized you can easily locate the source of the issue. If you need to have this checked out, consider YourMechanic, as a certified mechanic can come to you to [diagnose where the cooling system is leaking] https://www.yourmechanic.com/services/coolant-is-leaking-inspection

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!
  1. Home
  2. Questions
  3. After replacing many cooling system parts on my 2000 Plymouth Grand Voyager there is residue in the cooling system and a leak

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: To replace a fuel filter or not ? Vehicle had no fuel when bought; added fuel & it started, but should the filter be changed...

Hello, thank you for writing in. Your head is in the right place. While gas these days is held to some better standards, its very possible to collect debris in the tank over time. Considering the mileage on the vehicle,...

Q: Leaking antifreeze from underneath the car.

Hi there. Check all of the cooling hoses on the engine, to the heater core, and to the radiator. See if any hoses are cracked. Check to see if the clamps are loose and need tightened or replaced. Look around...

Q: My car switched gears by itself while I was driving.

Hi There, This sounds like a problem with the transmission range sensor, also known as the transmission position sensor. This sensor is responsible for sending data or input to the PCM relating to the transmission in order for the PCM...

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...
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...
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...