Understanding Coolant Flow in a Tesla

[@djosbun]

There is NO ONE better at explaining automotive systems (and how to properly diagnose and repair them) than Professor Kelly. Thank you, Professor!

[@WeberAuto]

Thank you Dave!

[@thomasruwart1722]

Ditto.

[@nooshiofficial]

Just came across your channel. Super glad I discovered ya!

[@briank10101]

​@kingofcrunk4237I'm thinking the same.

[@hole62]

I’ve learned so much from him studying Teslas…

[@jaybird7534]

I'm still astounded by Professor Kelly's Tesla Heat Pump bench trainer and excellent tutorial.

[@WeberAuto]

Thank you!

[@mikedevine1885]

This is the most interesting series of mechanical training I have ever found. John Kelly is a fantastic resource.

[@WeberAuto]

Thank you very much Mike!

[@Pukhraj_vansh]

I saw lots of video on this channel, and now i can say this man a bestest explainer i ever seen , hat's off professor

[@MegaHugro]

Impressive presentation of Tesla engineering. At 68 y.o. I am chomping at the bit for my Cybertruck delivery date. I have hated my pickups made by the Big 3 and their Unions for years. Go Tesla.

[@Hazard4K]

I've worked on high-end high-performance cars most of my life and I can't say enough about how amazing you are at your job. Even though I do have a master's -- I've always been bad at learning in a classroom or online. (experience) ... Somehow you have a way of conveying "experience" though a youtube video and I cannot thank you enough. I have always wanted to learn about the Tesla (and other EV systems) inside and out, all of the systems and how they interact -- so I would be able to work on "any EV platform + be comfortable in doing swaps on older ICE cars like my 2000 Boxster S. I've learned so much from your videos that I'm finally back to the point of "I really don't know crap" :) -- which is GOOD! You've managed to educate me more on this stuff in ~5-videos than I've been able to absorb in the past ~5-years.. Thank you. I will surely donate soon to this. I could handle being in your classroom for 10-hours a day 7 days a week!

[@randomvideosn0where]

This octovalve is a great device when every watt counts! Maybe this type of thinking can be applied to grocery store freezers and data rooms within buildings (currently all heat is dumped outside even in the dead of winter).

[@WeberAuto]

Agreed! Thanks for watching.

[@ArtCooler1]

Many grocery store refrigeration rack systems have heat recovery coils inside the building where air from the store interior is blown over them to recover heat from the refrigeration cycle vs. dumping it outdoors through the condensing units.

[@randomvideosn0where]

@@ArtCooler1 I am curious, where have you seen this installed? My company does a fair amount of grocery store and wholesale warehouse construction, and I have yet to even see provisions for this let alone install.

[@ArtCooler1]

@@randomvideosn0where I've seen it in older grocery stores.

[@ralanham76]

I also think and this being used in restaurants and homes

[@dirtyhank]

Very informative, as always. Keep up the good work!

[@WeberAuto]

Thank you very much D H!

[@bi5048]

Nothing but only immense knowledge from this channel. Thank you professor from Jakarta.

[@WeberAuto]

Thank you very much

[@seantt]

Thanks!

[@WeberAuto]

Thank you very much Thanapol!

[@D0li0]

That's freaking awesome. Excellent job describing how it works.

[@WeberAuto]

Thank you very much!

[@alexnutcasio936]

Savagegeese gave you guys another big shout out today 11 3 2023 . I’ve been here for years and agree!!!

[@thomasruwart1722]

I just found your YT Channel and it is outstanding! I really appreciate all the effort you put into these videos. As a retired [computer] engineer, I really enjoy learning how SHIT (Software, Hardware & Integration Technologies) works, especially when it comes to learning about the inner workings of my Tesla Model Y. Thanks!

[@WeberAuto]

Thank you

[@rjherche]

Thanks!

[@WeberAuto]

Thank you very much!

[@stephenw4720]

Awesome breakdown. Professor Kelly! Love from Cali.

[@WeberAuto]

Thank you!

[@Neil-ru7kw]

Professor , I wish you a great year with good health , good times and peace . Take care , Neil (a 74 y.o. old car nut) 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@UrbanOpsOffRoad]

Greetings professor Kelly! The class was awesome!

[@WeberAuto]

Thank you!

[@rud]

My air to air heat pump at home, needs to defrost in the winter time. I wonder if the car ever need to defrost. Would be kind of hard while driving to get the radiator above freezing to melt the ice.

[@WeberAuto]

Yes, it does at times. I believe the system can run warm coolant through the radiator to thaw it as needed. Thank you for watching.

[@rud]

@@WeberAuto thanks for replying! :D

[@rb-qc1fn]

Now that deserves a long; slow clap. Exceptional, as always! Kudos, and thank you, sincerely.

[@gp2003gt]

Always interesting videos, thank you.

[@WeberAuto]

Thank you very much!

[@MayGreenWho]

helps a lot, good video. the octovalve is excellent! so your presentation is!!

[@notnecessaryok8066]

You are the best teacher in world Mr professor can you please make video on ECUs how they commucate with other ecu using CAN bus ,how they collct data from sensor how actuator works I am eager to see this video Thank you in advance

[@mohammadhassankhan6707]

Thank you for the great video

[@WeberAuto]

Thank you very much

[@skybot808]

Love all the work your channel does. Enjoying these shorter videos!

[@WeberAuto]

Thank you

[@tedmills1962]

Another excellent video! Thank you.

[@WeberAuto]

Glad you enjoyed it!

[@TeomaveBahia]

Excellent Vídeo! Congratulations teacher!👏

[@WeberAuto]

Thank you Teomave

[@ralanham76]

Thanks for overview

[@WeberAuto]

Thanks

[@zakir.89]

Very useful information. Continue in the same spirit. I would really like to see the analysis of the Toyota bZ4X. Thank you!!!

[@32bits-of-a-bus59]

Thank you for this very informative video. What I found noteworthy about this design is the fact that the autopilot computer is in the same loop with the battery. If I understand it correctly, it means that the computer will be warmed up upon preheating the battery to about 50°C before charging. This is weird but I can imagine that even then then cooling power for the CPU will be high enough to cool it adequately (CPUs in notebooks often run at 100°C with no problem at all). So, the only downside might be large and fast temperature swings. These might cause mechanical stresses on solder joints due to different thermal expansion of the chip carrier and the PCB board during the temperature transition. Let's hope its impact on life expectancy of the computer will be far beyond the lifetime of the vehicle.

[@WeberAuto]

Thank you. Agreed, the temperature difference is more than enough to keep the autopilot computer cool. The autopilot computer has been liquid cooled on Teslas for many years. I do not know what the failure rate has been, but I have not heard of any failing.

[@joe2mercs]

This video is outstanding!

[@tesfahungetahunargachew4328]

Tnx a lot sir for all your effort to help us

[@danielnegash7985]

Professor you are different thanks lot for your explanation

[@WeberAuto]

Thanks for watching

[@TheKdcool]

I have a hard time understanding the difference between 2:18 series radiator bypass and 3:15 off mode. It looks very similar

[@piconano]

Learned a thing or two. Thanks.

[@WeberAuto]

Thank you!

[@dirkvanvuuren6227]

Awesome presentation.

[@WeberAuto]

Thank you Dirk

[@brddukaty7460]

Great video

[@WeberAuto]

Thank you

[@mcpeirotv7367]

It’s very interested

[@Pablo_Automotive]

Thankas for another Great explanation

[@WeberAuto]

Thank you!

[@DownshiftDre]

Best video! I drive in service mode sometimes to watch this all in action. How were you able to force to get into the different modes. Can you provide the logic on how each mode is entered?

[@WeberAuto]

Thank you. It requires the paid Toolbox 3 subscription from Tesla to enter Service Mode Plus; I should have specified that I was in Service Mode Plus. Use a Tesla Toolbox 3 Action called "Thermal Coolant Flow Cycle" to cycle the Octovalve through its four modes as shown in the video. The procedure takes 20 minutes (five minutes in each position).

[@MrEMILIO1959]

buenas tardes Profesor, que tal esta, mi pregunta. cuando vuelve a subir mas videos, Un Saludo.

[@max_power8510]

I donated to Weber Auto today. If I want to learn about the inner workings of TESLAs, it is either Monroe Live or WeberAuto. I went to UTI, but would have loved to have gone to school with professor Kelly if I could do it all over again. Keep up the good work.

[@GripFreak]

Excellent explanation! My goal is to one day attend your 5 day bootcamp. I have been building automatic and standard transmissions for 28 years and I have focused my attention and future on hybrid vehicles (Toyota). The transmission in a hybrid is far more than a conventional, computer controlled transmission. I would like to know what textbook you use or recommended for detailed study on theory and operation of hybrids? Thanks for sharing your vast knowledge and experience! See you soon professor Kelly. 😊

[@WeberAuto]

Thank you. I don’t have any book recommendations. Everything I have seen is already out of date.

[@scottklaw]

Awesome Info.

[@WeberAuto]

Thank you

[@markferraro5250]

Thanks JOHN this stuff is amazing. How are you doing?

[@djaliuma]

Thanks for that!

[@LawpickingLocksmith]

Thanks John, great info.

[@WeberAuto]

Thank you

[@mohammedsuboh1420]

Thank you very very much ❤

[@WeberAuto]

Thank you Mohammed

[@voytek34ify]

Thank you

[@aljones8519]

Super great Vid, but the word coolant is now old school since the '''coolant'' can now both heat & cool right? How about glycol...

[@WeberAuto]

Thanks for watching. Coolant is the name Tesla service information uses.

[@nkrish9232]

mind-blowing

[@존도우-r9x]

take care professor

[@7710747]

Thank you for your KZbin channel, I thoroughly enjoy your content and manner of presentation. One question if I may: What label maker are you using to create your yellow and black labels?

[@petef.4361]

Now if this guy could just get his hands on a Cybertruck!!!

[@iztokpavlic8785]

Nice presentation. But particucily in this case, what needs to be cooled? There is no any component with high temperature. My Tesla is cooling something in parking mode hours after I come home. I realy start to wonder what needs to be cooled down?🤔🤔🤔🤔

[@WeberAuto]

The high-voltage battery and all other high-voltage components get hot while operating. The battery gets hot while charging too.

[@nowsc]

… to my way of looking at this diagram, when the loops are “in parallel with each other“, I don’t see the parallelism. I see two separate loops, running at the same time. To me things that are concurrent are almost never parallel. How am I thinking about this wrongly?

[@WeberAuto]

Thanks for the feedback. It is how Tesla describes this system operation. Thanks for watching.

[@carlosfranchi5043]

Always top

[@WeberAuto]

Thank you Carlos!

[@carlosfranchi5043]

@@WeberAuto I'm thankful for every class sir

[@engeclassautoscop1819]

your course are online? i´m in Portugal, is possible to make one course please,

[@surendrapatel2573]

My tesla model x2019 P100D makes gurgling sound like boiling water. Could there be air bubbles in the coolant fluid. I hear this in the cabin. Thanks for your information.

[@golgothapro]

Hey professor ! I just got a wild idea ! If you could pull the three-phase leads for both MG 1 & MG 2 off the inverter in a 2nd or 3rd gen Prius, connect them together in the right order, and get the engine to run, (perhaps with an external 12v starter on the crank bolt)... would it drive the car without the hybrid battery connected to the MGs ?

[@kingzrecap1835]

Good day sir your video are really educative sir thanks for your time for sharing this knowledge sir, pls sir i want ask a question about tesla gear system pls sir how can i contact you.

[@kurdmap77]

Hey professor What is low voltage ev parts .

[@zahlex]

I don't get where in the diagram the heat transfer between coolant and cabin air is. Can anyone help? Is it the radiator? But isn't there a radiator in the bumper?

[@edc1569]

me neither

[@joeclaveau519]

This is the coolant side, it interfaces with the refrigerant loop at the Liquid Cooled Condenser (LCC) in the upper left and the Chiller in the upper right. One for receiving and one for rejecting heat, respectively.

[@WeberAuto]

The heat transfer from the coolant to the refrigerant happens in the Chiller. The refrigerant side of the supermanifold is not shown in this video, but you can see it and how the cabin is heated here kzbin.info/www/bejne/eqbNo2Z6h9Cjerc

[@zahlex]

@@WeberAuto Oh, the heat exchange with the cabin is in the refrigerant loop. Thanks, and thank you for the link. But after watching the whole hour, I still don't understand why. Wouldn't you want to keep the refrigerant loop as small and simple as possible?

[@WeberAuto]

@@zahlex This is the simple version. You should see the heat pump system in some other cars.

[@tianic]

Sir, with all the respect, but you look like kinpin from spiderman, bad ass look, but in a good way

[@WeberAuto]

LOL, thank you!

[@liveandletlive2894]

The colors represent temps?

[@wirelessnet2747]

So is series radiator bypass also used to cool the cabin and heat the PT/Battery simultaneously? Just open the valve to the LCC instead of the chiller?

[@carlosfranchi5043]

We're miss you mr Kelly when you gonna back? Don't forget us

[@WeberAuto]

Thank you. Soon

[@carlosfranchi5043]

@@WeberAuto thank you sir

[@danielnegash7985]

I just want to train the ev technology practice how can to join?pls

[@WeberAuto]

See continue.weber.edu/professional/programs/evtraining/

[@webreakforsquirrel4201]

I dont understand. If there is ambient heat outdoors what would the need for heating the cabin be? Its hot outside why would you want the heater on?

[@DanielEdwards-fj2ew]

Hi what simulation software is this please

[@53ricci]

I wonder how often those octovalves go bad and how hard they are to replace. Interesting video 👍🏼

[@WeberAuto]

Good question. Time will tell. Thanks for watching

[@ClockworksOfGL]

Probably not too often. IIRC, there’s an actuator motor and that’s about it. I’d be more concerned about the myriad of seals and o-rings that go into the Tesla thermal management system, especially within the manifold. That being said, Tesla does a pretty good job keeping the hose count down. Every one of those connections is a potential point of leaks.

[@jaybird7534]

When the student is ready Professor Kelly will appear 🧐

[@WeberAuto]

Thank you Jay

[@unpluggedganne2259]

I recently encountered the error codes “DIR_a103_lowFlow and DIR_a126” on my Model 3, which seem to be related to the coolant system. I ran a coolant test in service mode, and it indicated that the PT pump isn’t running and the rear drive inverter is showing a high temperature. The car is from 2020 and is out of the initial 4-year warranty. While I suspect that the coolant level might be low, there doesn't appear to be any visible leaks. Do you think simply topping off the coolant could resolve this issue, or might there be a larger underlying problem?

[@micheleunico]

hello or an error u 0110 on a Toyota Auris (loss of communication with the control motor control unit a) I'm literally going crazy either replace the inverter or replace the control unit checked the system on the gearbox up to the inverter, checked the one from the compressor to the control unit everything is ok the system and perfect can anyone help me please

[@collincarter1564]

Here because all my Temps are like 20c more than this 😊

[@wrzl1675]

I like the “fire mode” which seems to work well.

[@MrFoxRobert]

👋👍

[@WeberAuto]

Thank you Robert

[@djruido1]

I honesty hope everything is ok, I’ve come periodically but no video update. 😞

[@stillIdontknow]

Hi, I have Tesla's whole car here. Do you need it?

[@kurdmap77]

And how can i become a ev technician

[@richardshultz6834]

There are two diffrent coolants in a car. The water and antifreeze. And refrigerant for the heat pump. (A/C, r134a) You did not explain how these two worked together. I am pretty sure that the refrigerant dose not go through the battrie.

[@WeberAuto]

Thanks for your feedback. Tesla does not refer to refrigerant as coolant. This video is about the coolant (antifreeze) side of Tesla's heat pump. See my Heat Pump video for an expanded demonstration and description. kzbin.info/www/bejne/eqbNo2Z6h9Cjerc

[@surenbono6063]

..space age tech..mybe adopted from the international space station..you could tweak it on the software.. hopefully the A.I was not responsible for it to catch fire... terminator paranoia ..

[@santaclause2875]

Thanks, Prof. Kelly! Another excellent presentation. Seems EV's are much more complicated than we have been led to believe. Imagine a 10, 15, 20 year-old Tesla with multiple owners over the years, and a poorly maintained cooling system as this. Corrosion, damaged heat exchangers, pumps, controls, coolant passages plugged up.... OH BOY, what a NIGHTMARE!!!!!!

[@WeberAuto]

Thank you!

[@uosiumen]

It might be not so bad. ICE coolant has many temperature cycles in range of 0-100*C, while BEV coolant works much cooler, I guess up to 50*C. Add no blow-by's from exhaust or motor oil.

[@spazzman90]

Probably depends on the EV. But all of these types of cars put much less temperature stress on these components and fluids. Like almost none compared to a regular ICE vehicle. My wife and I both own Bolt EVs. 5 years and 60000 miles separate them, yet the coolant and brake fluid look identical between them. Manual doesn't even call for servicing until 150k miles.

[@bluelightguy1]

Lol these cars wont see 20 years, engineered to fail

[@WeberAuto]

@@spazzman90 The Bolt EV coolant needs to be changed every five years or 150k miles, whichever occurs first.

[@Alex-rv8gw]

hi

[@Sam_Haddad]

sad thing in EV vehicles that Tesla was the leader to EV cars in the whole world , we can see the clone everything from tesla .. Starting from the inside touch screen , the batteries , the AutoOpen charging port ,autopilot , and the Tesla door handle which now Mercedes and Range rover and other brand cars use , Sad thing is the china market has cloned all these systems copy\paste and they now got over 60% of EV market which kills the creation in this world ..

[@Sunset4Semaphores]

Executive Summary: buy a Toyota PHEV.

[@WeberAuto]

They have five coolant loops instead of two!

[@telwood15]

Why do people make life harder for themselves with this advanced technology. What is wrong with the the old 4 cylinder petrol car.

[@UQRXD]

Too much crap to go wrong.

[@zodiacfml]

fair

[@Alex-rv8gw]

hi