Skip the auto shop - Our mechanics make house calls

Q: Coolant flush before winter?

asked by on

So I just bought my truck and everything functions great. I bought one of the coolant testers that sucks up the coolant out of your radiator and will tell you what temperatures it will protect to. It said I was good up to -34 degrees Fahrenheit, so that part was good. But there is no coolant in the reservoir, however the radiator is filled to the top. Also, the coolant is a brownish color with a few dark brown particles flowing around in the sample I took. So my question is should I just add some new coolant to the reservoir, or should I do a complete flush and add all new coolant? And is it necessary that I fill up my reservoir since the radiator is full?

My car has 67700 miles.
My car has an automatic transmission.

A: I would recommend flushing the coolant and ...

I would recommend flushing the coolant and adding new since you just bought the truck and may not know the history of the maintenance prior. The reservoir is connected to the radiator and simply allows the coolant to flow back and forth between the two as it heats and cools.

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: My truck selectively shifts hard

Hi there. From the description you provided, it seems you have more than one thing going on with your vehicle. The hard shifting, and the starting off in second and then jumping into first as you accelerate, could be a...

Q: The car cannot be started, dash lights on

Hello. It sounds like the battery is dead and the alternator may not be charging properly. The first step would be to replace the battery. After that, you should have the charging system inspected to see if it would be...

Q: Could be a head gasket problem.

Hello. The amount of fuel you have been adding shouldn't have anything to do with this unless it is simply using a lot of gas. As for the coolant, if the coolant is going low that fast then there is...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...