Antifreeze turns brown after running the vehicle

Asked by Dec 07, 2014 at 09:28 AM about the 1994 Oldsmobile Cutlass Ciera 4 Dr S Sedan

Question type: Maintenance & Repair

After I have flushed the vehicle's anti-freeze twice the anti-freeze still turns brown after the vehicle is driven for a while. What is causing the anti-freeze to turn a muddy brown color?

1 Answer

24,375

There are two types of coolant flushes - chemical and water. The chemical flush is much more thorough than the water flushing. Most of the time flushing with water consists of draining the system and running water from a hose through it for a couple of minutes and then refilling it. That won't get all the rust and grime out of the system.When you add the new coolant, the cleaning agents in it are then doing their job and removing more rust and grime. That is one of the functions of radiator fluid, as it contains rust inhibitors and cleaners in addition to anti-freeze. I'd try to do another flush, with a chemical cleaning agent which you can get at any auto parts store. Dump it in and run the vehicle for a while, drain the system and repeat, then give it a final flush and refill, be sure to use the exact recommended coolant for your vehicle too.

Your Answer

Add photo

Related Questions

Search Oldsmobile Cutlass Ciera Questions

Oldsmobile Cutlass Ciera Experts

#1 dandyoun
dandyoun
Reputation 200
#2 tennisshoes
tennisshoes
Reputation 160
#3 Tom Demyan
Tom Demyan
Reputation 150
View All

Related Models For Sale

Used Buick Century
825 listings starting at $1,800
Used Buick LeSabre
14 Great Deals out of 1,924 listings starting at $995
Used Chevrolet Corvette
119 Great Deals out of 20,753 listings starting at $3,000
Used Buick Regal
116 Great Deals out of 10,863 listings starting at $3,995
Used Cadillac DeVille
7 Great Deals out of 1,640 listings starting at $1,999
Used Chevrolet Cavalier
1,000 listings
Used Pontiac Grand Prix
30 Great Deals out of 2,871 listings starting at $900
Used Buick Riviera
119 listings
Used Lincoln Town Car
33 Great Deals out of 1,820 listings starting at $1,750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.