How to Bleed Coolant, Remove Air From Cooling System 

Thanks man!!! You told me how to do it the right way!!!! Gracias!

Excellent information. I'm about to tackle replacing the radiator on my FX

Damn good video and you explained everything thoroughly

Finally, I was glad to see a real mechanic giving good and appropriate advice I just saw 3 videos from (poor) 'backyard' mechanics who are giving advice when they need some serious advice and schooling themselves. Unfortunately, misleading those who may not recognize their quite limited knowledge. Thanks.

GREAT VIDEO!

Awesome Peter! Thank you bro!

Your Midwestern accent is amazing.

This is tge most detailed video i have watched... thank you so much... very helpful.

this is exactly what i needed thanks!

Good work my friend Thanks!

This video helped me out a lot after i found out i needed to put in a bleeder valve to replace that stupid plastic piece that the coolant runs through which cracked and caused me to lose all of my coolant, thus bringing air into the system. Great video and really helpful

Thanks for the video

well explained...thanks!

Nice explanation bro

Thank you!

Excellent video

Well done pal nice introduction for new Techs . Keep it up Pal

Master piece video

should the overflow coolant reservoir bottle be full of antifreeze before starting the process?

I have a few infiniti's including Q50 and FX45. My nissan Frontier SE CC 6 Cyl bottom hose was not getting hot and always cold. I Changed Clutch Fan, Thermostat, Antifreeze, bled the system and nothing. I eventually came to the conclusion that the Radiator was either bad or clogged up, Sure Enough I take Radiator to a Radiator place and asked for a cleaning of the Radiator "$25" Pretty cheap. When I went to pick up Radiator I spoke to the person that unclogged it, he said it was pretty clogged up, put radiator back on, added Radiator bled the system and Viola all is well and the needle is always less than half way 🤗. Mind you my Frontier is in Blazing Hot Puerto Rico as it is my Vacation Truck, yet my engine runs cool at all times. A simple air bubble in the cooling system can cost you lots of money if you let it get overheated. Thanks for sharing, I will be working on my Q50 which was low on Coolant.

GREAT JOB VERY WELL EXPLAIN LOVE IT.

Good stuff, much easier on our MDX than my 370z lol.

Perfect video

So really just need to fill it up, turn the heat on full blast, wait and watch coolant level in the funnel until no bubbles? Seems super easy but still have anxiety when thinking about doing it myself.

You turn the heat on not due to hot or cold air, but because most heater cores have a coolant valve that regulates the amount of coolant through the heater core. Some vehicles don't regulate the coolant, only the air. But to be on the safe side, heat temp all the way up to allow max coolant flow, and the fan on the first click just to make sure the system is on to ensure the valve is open. This is also a double check to ensure you've got the air out of the heater core if you feel heat once the engine warms up. It's a good thing to see air come out as long as it stops. If the head gasket is blown, there will be nasty colored water and air coming out and it won't stop.

Do you need to add more coolant to the reservoir after?

Dash is fluctuating a lot after thermostat and radiator change, never did this before. Was driving fine and anytime I gassed above 4k rpm I could visibly see the needle go up then as soon as I stopped gassing it went right back down. I’ve been trying to get any air out and still haven’t gotten it all out.

just wanna add in, these vehicles the fans should not always be running; if they are that would indicate a bad fan control module which is mounted on the fan shroud

Thanks buddy what’s the procedure on the w212 M157 engine after new coolant fill up. Thanks. Last time I did this - I had over flowing coolant all over the place and expansion tank went empty 😟

Thank you for this info. Can you explain please again a little more what happens when you run the car WITHOUT connecting the mass air flow sensor? What issues will it cause? I will appreciate it.

Hi how can you check for actually air on your sistem ?

I have a Toyota Camry 2001 2.2 Litter e tine 4 Cyl . I can hear a gnashing sounds like water in the top of my engine . Is that a Air in the intake .How do I get rid of that slashing sounds like a water ?Then I had a flaming engine lights But my car runs good How do I fixed this issue

When can i take the funnel off with the car on or off

I have the same problem what’s the reason for this help please

engine must run coolant level check infiniti FX 50?

What does it mean when the coolant is constantly overflowing?

ok i got a question about draining the coolant to have it replaced,,i am wondering if by draining it from the petcock if this will completly drain the whole system or will you always have some fluid left because you have a thermostat valve which will keep part of the coolant in the engine? does it need to get to temp and open up to drain the remainder? obviously you should not be runing it while doing this should you?

My 07 g35s sedan is over heating only at idle with AC on then causes my coolant reservoir to boil and spit coolant out of its drain hose (the hose that runs down between the fans)

My kid has a 2020 q50 and his belt shredded to pieces and over heated. He had coolant everywhere and he added some now his car runs like crap. You think he has air bubbles now

I need help My bleeder valve piece got broken /damaged. For my infiniti g35 2008 sedan . Should i buy oem valve with the hoses?

good video to learn from bro thanks. i have a little problem with my 2014 370z and i need answers fr, i changed the coolant fluid and the heater hose connecter but afterwards while driving the car i noticed water sound sloshing behind the steering wheel! i am kinda worried tbh and hope u got any idea to figure out what caused that issue and how to solve it. thanks again

I bled my system this past weekend and noticed no heat or very low heat when at idle.... but only when i drive or hit the gas. Car is not over heating at all, but, was wondering why no head at idle. I'm thinking the thermostat, will get that replaced soon.

I changed my thermostat recently and now for like 3 weeks almost lol I've been trying to get air out of my system by just popping the bleeding report watching this video I'm gonna go buy that blader kit that yellow bucket and I'm gonna do it this way this way what's wondering do I have to have my bleeder cap open while using the Yellow bucket kit? This all started when I changed my new thermostat and this didn't happen when I changed my radiator to put in a mishimoto radiator. Idk where I went wrong

How would this work for a 2006 Saturn Ion w the 2.2 Ecotec, the radiator is not accessible in this car. Thanks

Question, I got a 15 Infiniti Q50 3.7, customer has had its radiator replaced at another shop, looks aftermarket, and thermostat, car is overheating at idle. Checked for fan operation and everything seems normal, radiator cap looks good, bleed the system, did a leak down test to check for a blown head gasket, good. But keeps overheating. Im noticing temperature drops when I accelerate the RPMS slightly, and it drops quickly back to normal, goes from 234 F to 205-210. Im thinking its a coolant flow issue for sure, maybe water pump is on its way out? Car has over well 110k miles and its never been replaced.

Hey, I have a question I’m hoping you can answer. I need to replace the radiator fan control module on my 370Z. The dealer wants to charge $800, so I’m tempted to try it myself. To access it, I know you have to remove the reservoir, which has 2 hoses from what I understand, as the module sits underneath. It looks identical to the reservoir on this car in your video. My question is, do you have to bleed the system if you remove the reservoir?

Question: my gauge says my car is not overheating but every time when I get to work which is like a 15 minute drive, I get there and there’s steam/smoke coming out of the front. Any suggestions?

This engine kills me, my infinity fx35 has a cold lower hose after thermostat and water pump replacement. Just can't get the air out. Tried all the tricks and am at a loss. Any tricks that might help me get the Tstat open? Tried disconnected the fan too but that didn't help.

My car doesn't overheat at least the needle gauge Says so but I have noticed that after the engine gets cold (eg left overnight from a long drive) the coolant from the resorvoir gets empty but stays fine while driving) No visible leaks. Could it be a bad radiator cap

Would the vk45 be the same as the vq35 for the bleeding process ?

What about coolant got boiling when I drive and coolant got boiling out q50

I just recently changed my thermosta tried to get out the bubbles using this method and think it worked but some how if Idle for more than 5 mins the temp starts to go up any suggestions maybe the thermosta I bought is faulty?

i have a 2008 g35s and when i changed my stuck open thermostat i bled for about 45mins and i was not having issues. now my car overheats at idle however when heat is on there is no problem. i thought to try and bleed coolant out with this tool. it bleeds out well however when i turn off the heat it overfills the funnel with coolant and will overheat. any help?

Great video man , but still will be there is air in coolant system, only the way to make sure that no air by doing vacuum and coolant fill after vacuum

Trying to bleed my g37 and wondering if there is a bleeder valve you need to open before you bleed the system

Some mechanics say not to turn AC or heater on and they say to keep rpm at 2000 rpm for 20 minutes or so. Others like you say to turn AC / heater on. Which method is true?

Yo got a question , my car coolant boils out the resovior is that due to it not being bleed?

Question, my 370z keeps overheating when doing this then as it’s over heating, the fluid rises a bunch and starts boiling over. What am I missing? How do I get it to not overheat and how do I know when I am done and the system is bled?

Any ideas why my G only overheats in drive? When in park it can idle fine for hours without overheating, but soon as I put it in drive it starts to overheat again..

I put on a new thermostat did the flesh with the funnel no more bubbles my heater was coming out hot when I'm driving the car's fine but when I come to a stand for a long time my temperature goes over the middle 2008 Infiniti G35 sedan I need help is that a failing water pump no leaks nowhere

So if I were drain my q50s radiator and refill it very slowly and carefully would I have to bleed the system? Appreciate anyones answer here.

dont you mean to say by runing the heater it removes and decreases heat from the engine and not increases it?

I followed all your steps. I left it on for 15 mins then all the coolant was gushing out of the funnel?? Why is the funnel overflowing???

I did it but coolant leaves reservoir and fills the funnel. Not sure what I’m doing wrong

Thank you for your advice. I was looking for that part of lifting the front if its a go or no go. My last mechanic stole my coolant reservoir of my CB4. So from now on ill try all by myself. Takes longer and ill make some mistakes. But at least no one steals my shit xD

The level in the funnel rises because coolant is expanding from heat not proof that there is air in the system

This is a 3.5 hr there’s a bleeder valve that makes this easier unlike the 3.7vhr

Has any one found a fix for this? I'm having the same issue 2011 g37 sedan. It's driving me crazy really cause I can't figure it out and no shop I take it to can figure it out I've dumped roughly 600 bucks in diagnostics and shop visits for this issue but no one can figure it out...why does it overheat at a stop but cool down when driving? No leaks any where head gasket is fine, fans do come on, coolant switch works, water pump works, changed thermostat problem still persists. Any answers?

And obviously wait until the car cools so I can remove the funnel ?

I want to do this , but everyone in the comments seems to be having overheating issues. I don’t even think I wanna do this anymore, I’m afraid my g is going to start overheating too.

Upper hooose

You used half coolant and half distilled water?

what if the bubbles just don’t stop?

I didn't get it

How TF is the ac going to cool down the coolant?

Why is it important not to tip car on 2 wheels?

Didn't see nothing no bleed

Is t this a 37 not a 35

you didnt bleed the air out all talking talking

such a long video on a 5 min job

Hello what’s the best brand of coolant for the g35 m35 and 350z