How to Quick Flush Your Cars Cooling System

How to Quick Flush Your Cars Cooling System


Learn how to flush and fill the coolant in your car or truck. Keep your radiator, heater core, and engine clean. Flushing your coolant is good for the cooling system to prevent rust and to prevent your car from overheating.
First you drain the old coolant from the radiator, then you fill it with distilled water and coolant flush chemical. Then you run the car. Then you drain the water from the radiator and fill it with 50/50 antifreeze.

How to Superflush your Cooling System:

Here is How to Test your Cooling System:

Here is how to Flush your Heater Core:

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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.

100 Comments on "How to Quick Flush Your Cars Cooling System"


  1. What is wuter?? Or did you say water? I have a hard time hearing things. I'm from Texas , and I guess things are said way different here.

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  2. My water pump on my 2005 Chevy Colorado just bursts all at once and leaks the fluid everywhere every 1-2 years even faster way to flush.

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  3. hey chris i got a rlly good idea: how bout a video on how to install a digital engine temp readout

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  4. Rememer u flushing the radiator only but u forget to flushing at jacket cooling system bro .. unscrew bolt at the block and removed .. take out the radiator return line cooling hose and blow it with fresh with aircompressor … U know we need do this .. if the thermostat opened ..cooling water remain on that block will flow ..to the radiator .. with rusty and dirty..and it will reduce quality cooling and make u radiator little bit dirty… Nice video bro ..

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  5. I enjoy your videos. 40° is not cold us old guys worked on cars when it was zero well maybe 10°, and don’t even get me talking about wet , we worked in the rain as landscapers But either way the rain and the cold didn’t kill you. I can remember when I lost two fingers from a bad accident that same day and I continued working . I remember when my friend punctured his eye but we kept on working . I do remember my friend was under a car and it fell off of the supports and his head was cut off but he didn’t quit that day he just kept working. Yes us old guys we’ve got some really good stories to teach you young weasels how to work like real man with no heads fingers eyes or brains for that matter yes us old guys we’ve got some really good stories to teach you young weasels how to work like real man with no heads fingers eyes or brains for that matter .Again good job thanks for the tips. Yes I can also remember a story . OH OH I got to goner early comes my wife she’s the one who actually hurt us all and caused all those terrible injuries, don’t mess with a woman’s scorn. Hope you guys enjoyed on my lies have a wonderful week and happy Fourth of July

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  6. How are you assured the 50/50 had distilled H2O and just not well or city water? That is why I NEVER use 50/50. I buy full strength and use my own distilled H20.

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  7. Is it true that only the coolant reservoir should be check if below minimum level and top up and the radiator tank cap is ok not to open?

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  8. How did you get all the water out from the system just thru the petcock valve? You have to keep the car running so the thermostat opens and more wates comes out from the core and engine block?

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  9. CHRIS IS AN AWESOME YOUNG MAN WITH LOTS OF SMARTS.  EVERYONE, PLEASE MAKE SURE YOU DO YOU RESEARCH, PAY ATTENTION TO YOUR CAR.  CHECK ALL YOUR FLUIDS WEEKLY AND READ THE MAINTENANCE BOOK ON YOUR CAR, WHAT NEEDS TO BE DONE AND WHEN.  IF YOU BREAK SOMETHING, GO OUT AND PURCHCASE IT AND FIX IT.  DO IT ON YOUR DAYS OFF BEFORE OR AFTER WASHING YOUR CAR.  YOUR CAR WILL LAST FOREVER.

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  10. Does it really work?? And does it clean flutes out or do I need my radiator rotted out?

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  11. I’m a little late but I have a question for the more experienced people. Do you have to drain the coolant from the engine block or is using the drain plug on the radiator good enough?

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  12. I don't like this procedure.

    If you change coolant regularly there should be no rust and flushing with chemical is not necessary. I still use anti-leak however.

    If you use 50-50 and do not entirely drain the system, the coolant will be too dilute.

    Use undiluted and after mixing with the water that is not drained (after flushing with just water), resulting will be 60-80%, very good. If 80%, add pure water to reservoir.

    No need to drive the car; just idle will do.

    Be sure to turn heater on all the way, even in the summer, during flush (with just water) and adding back coolant and run with heater on for a few minutes idle.

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  13. Method i apply to flushing the system using the garden hose. Ok some radiators don't have drain plug/bottom hose has to be removed from radiator. Loosen bottom hose clamp. Sometimes a hose can be very difficult to remove. I use my home made flat bladed screw driver, end is bent backwards/like a hook. Gently open hose end. Use a can of spray silicone/spray around hose end. Use the screw driver to lift hose end away from radiator hose neck/gently turn hose from side to side, allow silicone liquid to work its way between hose internals & radiator hose neck, this action help with easy hose removal. Be very careful not to damage radiator, especially if your plastic radiator is old = brittle. Remove hose, drain old fluid into a container for disposal. Try to get access to one of the heater core hoses/remove/insert garden hose/slide heater control in cabin to hot = opens heater tap/ remove radiator or expansion cap/ push bottom hose back onto radiator/leave hose clamp off or loose/turn on garden hose to flush system. You are reverse flushing the complete system through heater core, (small radiator inside your cabin that provides heated air), back through 2nd heater core hose/ through engine block, cylinder head, through bottom or top hose depending where the thermostat is located & out of your radiator or expansion tank cap depending on what type of system you have. Remainder of old coolant/ water exists where cap has been removed. You can also have the motor idling with hand brake on. Keep the garden hose going till clean water comes out of system. Flushing is completed. Its the easy way, not so environmentally friendly. So good luck all you back yard mechanics. Cheers from 🇭🇲. 👌🏻👍🏻

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  14. So I have a 1987 Acura legend and when i was following your routine. I started to pour the distilled water in the radiator when it filled up. I had only gotten like a gallon in when it was full so I turned on the car but instead of the water sinking it actually did the opposite and overflowed. I replaced the thermostat and it is still doing this. Only when I squeeze one of the radiator hoses does the water seem to go down. Please help and respond with advice

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  15. Ahhh no you never put anything in a BMW cooling system except blue BMW coolant. They have the worlds pickiest cooling systems and that green shit will ruin it

    EDIT: Also never trust BMW temp gauges. Except for the live reading you guys had pulled up in the OBC

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  16. Is anyone familiar with draining coolant from the engine block? I have a 2008 Eclipse GT and it says I have to drain coolant from the radiator and the engine block. Has anyone had any experience with this?

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  17. So if you flush out your coolant completely, can you use inorganic coolant rather than that dumbass Dexkill?

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  18. I have a leak in my system, I have identified the cause and it seems to be the joint between the hose and the water pump. The hose is not ripped or punctured, what can I do to stop the leak?

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  19. You’ve helped me with so much with your channel! Some mechanic tried getting more $ from me but I showed him one of your videos!

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  20. Did you have to flush it twice? At 3:56 the "water" is still kind of orange, but then at 4:12 it was clear. Did you flush it twice? Or is that just from the same flush but two different trays?

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  21. Only around one half of the cooling system capacity drains from the radiator on my cars so I just drain what's in the radiator and refill it every year. It only takes 10 minutes . It's not as thorough as Chris's method but there's always fairly fresh coolant in there.

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  22. I don’t get it: my engine feels hot after I drove but the gauge goes up to the middle and stays there. No overheating warning.
    Still I thought I’d flush the coolant, which might have lost its properties.
    Doing it your way (which is the way it’s written in the manual) but only 3 litres come out. There should be 10.
    Filled with distilled water: could fill only 3 litres. Had the engine turning a bit then drained the distilled water: it was mixed with coolant!
    Where was this coolant and why does it not come out completely while draining. Faulty pump? If the pump was malfunctioning, there would be overheating, no?
    Put again three litres of water mixed this time with a cleaning agent. Drove 15 min. No overheating. Am waiting for engine to cool down and will drain again. Still, this is spooky to me.

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  23. Wouldn't the water pump only circulate if the engine is at operating temperature? I don't see how after you've waited the engine to cool down, and then drain the water, and turn on the engine, how the water pump is circulating the coolant… I don't think the thermostat is open at that point.

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  24. Those were junk cars. Aluminum blocks were problematic and use oat or hoat only… thepink

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  25. Hey Chris, while u were draining the chemical flush, that stuff might be hot right? So did you drain it right away? Or did u wait for the engine to cool down? Also does draining scalding coolant cause cracks in the radiator due to extreme temperature change?

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  26. Thank you!
    I accidentally put the wrong antifreeze (not diluted) and I am not sure if that will mess up my car or not. 🙁
    So hopefully doing this and putting the right antifreeze will fix my mistake.

    Side question: Will my car mess up if I leave the non-diluted one in there and just add distilled water?

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  27. Do NOT use any brand of pre-diluted coolant! All you're doing is paying for incredibly expensive water and giving the manufacturers a huge profit.

    Example:
    One gallon of full strength coolant – $14.00. Add one gallon of water at about $1.25 and you have 2 gallons of mixed coolant for $15.25.
    One gallon of pre-diluted coolant – $12.00, so basically you're paying $6.00 for half a gallon of water. Two gallons of mixed coolant will cost $24.00.

    So to make 2 gallons of diluted coolant, do you REALLY want to pay $12.00 for the gallon of water in the pre-diluted mix?

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  28. Don't you have to drain the engine block on BMW? On Subarus have to do it or else there will be old coolant left in the system.

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  29. i dont get it,how didnt you get air in the system if u drained the radiator and just poured water in without airing the system after?

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  30. Just replaced entire fuel system on my 1968 Cadillac, wish you had a video for that, what a shit show

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  31. Oh no, my father didnt do this to his car. He just cleaned the plastic tank and added the new antifreeze. What harm does is it do to the car if one does not follow this procedure?

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  32. Question need HELP: I followed these steps but when I went to drain the water only about a gallon (if that) of water drained from the petcock hole. I also took off the coolant reservoir cap. Also, while the water was circulating through the engine the air coming through my vents was not hot at all (so I guess I also have air in my heater core). How can I fix this?? How can I get the rest of the water in my system out? Need help.

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  33. Hey Chris, my car cooling system isn’t sending coolant to my head the hose isn’t getting hard at all

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  34. Will this work if my car has been running hot and my heat dont work due to needing a blower motor. Could I still follow these steps?

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  35. It helps if after you’ve removed the lower plug to remove the upper fill cap so it allows the coolant to evacuate the system completely. But I guess since it’s a BMW it really doesn’t matter because it’ll be stranded along the road or in some shop 90 % if it’s life.

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  36. I HAVE A 2018 MUSTANG GT WITH ONLY 2500 MILES ON IT SINCE NEW. ACORDING TO THE TRANSPARENT RESERVOIR IT WAS DOWN A HAIR, SO I ADDED 1/16 OF AN INCH OF GREEN PRESTONE ANTIFREEZE TO THE ORIGINAL ORANGE ANTIFREEZE, SO IS THIS MINIMUM AMOUNT GOING TO, HARM MY ENGINE? ( I USED TO DO ALL THESE THING MYSELF, BUT CAN NOT NOW, BECAUSE OF HEALTH REASONS) BACK THEN, WE ADDED ALL KINDS OF COLORS , AND BRANDS IN OUR CARS, WITH NO ILL AFFECTS. ( PLEASE GIVE ME A KNOWLEDGE ANSWER, ASAP)

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  37. I think i just saw chris for the first time in this vid. Im disappointed. It was kinda cool not knowing what the legend looked like.

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  38. umm.. what if the water level doesn't drop at all after you start the vehicle and it over heats? I only put in 1L and my truck takes 13l but the water level didn't go down at all after I started the vehicle?

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  39. Hey brotha. Love your work very helpful. I have a 2006 Dodge Charger srt8, I’ve been flushing the coolant out and it’s not coming up clean. It’s a dark reddish brown. How many times did you flush your cars before it became clear? Or does the reddish brown color mean there’s something wrong?

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