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・Fair and transparent pricing

Get a quote

What others are asking

Q: dies after driving a little while an wont start again

This sounds like the alternator is not recharging the battery. You drive it for a while then it dies like the battery is dead from the charging system not working and the voltage drops below the operating voltage needed to...

Q: Heater is not working

This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay supplies...

Q: Expansion tank leaking

The expansion tank on these vehicles are known to have leaks after years of use. The new replacement tanks hold up better to the coolant heat and pressures they encounter. You will most likely need to get the entire tank...

Related articles

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...
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...