Posted in Car Repairs

How to Check and Test Your Coolant/Antifreeze

   May 2, 2021  50 Comments on How to Check and Test Your Coolant/Antifreeze

How to Know When You Need to Change or Flush Your Coolant. Do you need new antifreeze or a radiator flush? Learn 4 different methods to test your coolant including doing a visual inspection, using a hydrometer to test the freezing point and boiling point, using a multimeter to check the antifreeze, and testing pH.

After watching this video you will know if your coolant is still good or if you need to do a coolant flush and fill!

The multimeter I used (under $20 here): http://www.amazon.com/gp/product/B001O1X65A/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B001O1X65A&linkCode=as2&tag=chri0e2-20&linkId=DQXKJ44LE7TL32CR
The Hydrometer I used ($3): http://www.amazon.com/gp/product/B000BOA9RY/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B000BOA9RY&linkCode=as2&tag=chri0e2-20&linkId=T6IACNWTAPOUC33K

How to Flush your Heater Core: https://www.youtube.com/watch?v=LD2LGkUycQg
How to Fix a Car with No Heat: https://www.youtube.com/watch?v=-XjXTVJhFLM
How to Flush and Change Your Coolant: https://www.youtube.com/watch?v=L5pNZ4JHsoY

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Disclaimer:
Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.

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50 thoughts on “How to Check and Test Your Coolant/Antifreeze”

  1. Quick question. Is it okay to top up my coolant with distilled water?

    Some extra info… It was changed two years ago during regular maintenance, but I'm not sure which brand they used. It's green, although the recommended coolant for my car is red or yellow. I plan to flush it out and add the correct coolant myself next time (in a year or two), but for now I'd just like to top it up. I've performed a visual inspection (looks fine) and the hydrometer freezing point test (-26 °C) so I'm only worried about the level which is very close to minimum. I know diluting it will affect its freezing point, but I wouldn't mind even if it measured -20 °C.

  3. I just had a radiator flush done today by radiator shop. I was sitting close in my RV watching him. I didn’t see him put a container under the truck (f150 1999). When i went to pay I looked at the overfill and it looked dirty. He said he could clean that out. So I guess I’m doing all these tests to see if he did it. I doubt my husband ever flushed the radiator. But it only has 60,000 miles on it.

  11. Thank you for explaining my problem. My question is: After having an Oil, Filter Change, why was this not looked at? Isn't this part of maintenance on a Vehicle? It's Not rhe Owner's fault this was noticed. I noticed a Maple Smell. This was my go to answer Antifreeze. I hope I caught it in time to save her from unnecessary car Mechanics. Very overpriced. 🌟👍!

  15. I couldn't find one word on whole google or internet about my question…My European Opel GM car should use original orange GM Dex-cool coolant.I know everything about not mixing this with that,what is IAT,OAT or HOAT coolant,but..there is nowhere on internet to find if I can switch from OAT coolant to HOAT in GM car???I never used Dexcool because of old topics about famous Dexcool problems,but red/pink G12+(VW specs).This European G12+ is compatible with Dex cool,they are both OAT(silicates free).Now,HOAT is also mix of OAT and again a little bit of silacate inside..not much as in IAT green stuff but still..In my eyes Hoat is the best compromis,best solution?Can I flush mu old OAT(G12+) and Use newest HOAT(G12++ or G13)?Thanx

  19. Thanks, I ran that current test for the first time, my coolant is about 18 mos. old and under 25k miles. At 20vdc setting, I read 0.09, so I guess that confirms it's still very clean (it looked so). The hydrometer says only to do while cool, that only has to do with not burning you and not about chemical reading, right? I'll wait to check in morning, but I don't think I need to. I like that ph test.

  20. my coolant looks exactly like the bad coolant, guess that confirms that 3 out of 5 balls floating in the antifreeze tester isn't good, going to flush it anyway but still

  22. Really appreciate the video but also want to share that, as I understand it: A hydrometer can't be used for Propylene Glycol Coolants (only Ethylene Glycol) and those test strips often can't be used on orange or red dyed coolant as the dye can affect the reading and make it seem okay when it's not. I believe a refractometer would be the best option that would work on all coolants.

  29. i use milk for coolant only 1.89 at the gas station and i only need 3 and i get to drink half of the third jug. i stay pretty cool.

  34. looks like you went to Economy Lube ya they messed up bigtime. There are three colors of coolant Dexcool which is made by AC Delco this is only suppose to be put in GMs that are not GMC or Pontiac the only trucks that use it are those that say GM or Chevy on the hood. Don't pore dexcool into your engine you will destroy it. The next type is glycol which is green this is the only antifreeze you put in that truck. and last but not least is frostoff which is made by Peak and is blue don't get this one mixed up with wiper fluid and don't pore that stuff into into the wrong tank you can destroy your engine.

  36. if the coolant is suppose to be neon green and it is a muddy color wouldnt that be a good idea to do a coolant flush? would you need to do the 3 other tests?

  38. You can also give your finger in there when it's cold I just barely stick your tongue on your finger if it's real sweet it's good it's real shower it's no good the sweeter the better I don't necessarily recommend this but it's what I do but like I said just barely the tip of your tongue so you can taste it and then wash your mouth out real good but it works

  39. Hey Chris my 2013 v6 mustang is making weird splashing and bubbling sounds no leaks or over heating I was told it was an air pocket or something but how do I know for sure it sounds like it’s right next to my dash

  40. My owner's manual doesn't specify the colour of the coolant. It says it has to be an ethylene glycol-based antifreeze mixture tho…

  44. Wow! After seeing this, I can’t complain about how mines look… mines are green and not clumpy. Now I feel much better

  46. Outstanding…. First time I've seen the multimeter method! I'll be using this from now on in addition to the visual test. Same same the pH test. I happen to have a very accurate pH tester.

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