#1 Mistake Filling Car Coolant Fluid!!

Filling your car's coolant reservoir to the FULL line with fluid does not fill your radiator!
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[jacobnichols]

Some cars have completely sealed so you have to fill it via the overflow tank....

[charleswooldridge]

Important to note over time it will pull coolant from the bottle into the radiator and back as the coolant expands and contracts.

[greatnew_products]

You HAVE to make sure the engine is NOT HOT!!
Otherwise you will have 3rd degree BURNS!

[georgeburns]

Glad for the info, but please stress the safety of opening that cap under pressure more. Seriously guys do not do it. You’ll burn yourself with a geyser of boiling coolant all over you.

[cmscms]

Cold engine, remove cap, start engine, warmup with cap removed, wait for thermostat to open, run heater full force, then add fluid. Replace cap. This prevents air pockets from forming.

[sandiegodan]

In almost all modern cars, if the reservoir has at least minimum fluid in it, the radiator is full. There is no need to open the radiator cap. Adding to the reservoir directly is the proper way to add coolant. You can open the cap when everything is cool if you’d like, but it will be full with no room to add coolant.

[condor]

Wrong. A low radiator fluid level will be replenished from the reservoir over a given heat cycle or two. Go drain 16 ounces out of the radiator petcock and get the car hot. Turn off the car. Fill the reservoir to the full mark. Next morning reservoir will be empty because it replenished the lost fluid.

[charlesmckenzie]

Yes, you put the coolant in the overflow. Because, when the engine cools off, if the radiator or the cooling system is low, a vacuum is created and coolant is sucked from the overflow into the engine, next time, you fill rhe overflow again. Unless, you have a leak in your system, then you have bigger problems than low coolant.

[VamosFumando-koov]

Thanks for the short and to the point video. This is all I needed answered.

[monkeymcgee]

Some cars don't have radiator caps

[veto]

Bro.. you just caused about 1000 second degree burns 🤣🤣

[MisstyG]

I have a 2014 Outback. While filling the windshield wiper fluid container, earlier today, I happened to look at the coolant level. It was completely empty. I couldn't figure out why my car had not notified me that I was out of coolant. This video just explained that. What a relief!

[nodak]

I own three cars right now, none of them even has a radiator cap. This video is good advice if your car is from 30 years ago or older.

[mcfish]

This man does not understand “solid” fluid systems. Many new vehicles don’t have radiator caps(or they aren’t easily accessible) the reservoir is needed bc the coolant expands as it gets hot and then contracts again when it cools. So the coolant can expand out into the reservoir then when it cools off again the coolant shrinks, because the system is closed this creates a negative pressure in the coolant system which pulls the contents of the reservoir back into the radiator until the pressure is neutral again. Notice how there is a hose connected to the bottom of the reservoir. Adding coolant to the reservoir is just fine. It will not cause an issue. Any air that happens to enter the coolant system will be “belched” out when the system gets hot again because reservoir is vented at the top.

[Strtrkr]

Good luck finding the radiator cap. Notice the cap on the reservoir - it's labeled in PSI. The bottle is the radiator access.

[jFlockerzi]

A Properly functioning cooling system would indicate the amount of fluid in the system by the overflow bottle. So unless the system is leaking, putting it in the overflow would get it back into the system just fine.

[SniqrsFFA]

To further specify cool, make sure your vehicle hasn’t been running in the past 6 hours lol I’ve had too many friends get burnt up from opening the radiator cap when it’s not cool enough yet

[Cohunnamatta]

The reservoir overflows tank on my car has the radiator cap on it and it goes to the radiator. The water pump actually empty’s into the overflow. That’s how it is on my dodge challenger.

[Aaron-cdrx]

Thanks to youtube learning, the real mechanic shops are getting more work. Keep it up 👍👍 keep posting and thank you

[jsavage]

Depends on the vehicle, some only fill up from the resivore but if you have a place in your radiator to fill up the radiator, you better go into the radiator bc on those said vehicles, the resivore is only there for over flow