How VW Coolant Bottles Fail

For full show notes, check out the blog; goo.gl/l0CIxo
Today we are looking at failures of Volkswagen coolant bottles. This has been happening since the start of VW having a coolant bottle. Failures of this VW part comes in a few different forms. Luckily this is an easy DIY, and pretty cheap too
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Deutsche Auto Parts! They are the VW and Audi parts experts. They have great prices and awesome service. Plus they work really hard on a ton of VW DIY videos. goo.gl/pf8tD7
Buy a new coolant bottle from Deutsche Auto parts here; goo.gl/GcGlGu
Join me as we break down the VW coolant bottle
What the VW coolant bottle does
How the VW coolant bottles works
How the VW coolant bottle fails
Signs of coolant bottle failure
Diagnosing VW coolant bottle issues
Is the coolant bottle a DIY part?
and more
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[@EL-Duder-Reno]

My coolant bottle just broke and I knew I could count on the humble mechanic for the right info. Thanks

[@MrGary10k]

Thanks My friend. My 2013 Tiguan had this happen today omw home today. Watched the temp like a hawk when I pulled over. Temp read like it always does. Letting the motor get cold. Now I know what to look for. Thank you much!

[@willrobinson1671]

Thank you very much HumbleMechanic. Very clear explanation, very informative.

[@alansauer6853]

My 04 Jetta was running hotter than normal. I had already changed the reservoir and cap. I then changed both the thermostat and ects ( engine coolant temperature sensor). Well everything is perfect again. I don't know which part was the problem, but since I had to drain the system I thought I just change both parts . Thermostat was$9 ,sensor was$17

[@andreturner4190]

yes I also have a 2004 Jetta 1.8T engine the reservoir cracked at the top and I just ordered another one not only did that go to coolant control temperature when also I replaced that but now it doesn't seem to be working I guess the whole problem is the coolant reservoir bottle

[@dj_marty_d]

You keep saving me money!! Very straight forward. Thanks!

[@mercer982]

all old mk3's have the bottle so fuzzy you can't really tell how much coolant is in there.

[@drivewasher]

Just thought I'd mention this, as I had an issue with coolant level sensor on a Skoda (same as VW & Audi). The 2 prongs in the bottle dont relay resistance the cluster module calculates capacitance. This type of sensor is called a capacitive sensor.Similar arrangement also used in the sump pan to detect oil level, but the capacitance calculator is built into the oil sensor.

[@bonifatiusshimbaranda]

Correctly said...

[@monkkeylover123]

best video yet on this subject. I have 2001 Jetta. Have flushed and filled with VW coolant. Always the one sensor rod closest to firewall corrodes. have replaced 2 times. No coolant migration. Even after flush/fill, coolant gets brownish. Could this be oil and could it be due to a bad oil cooler or seal? Thanks

[@themachine8009]

I’m replacing mine today. Very excited

[@DJDrue]

very helpful video, answers a bunch of questions I had. Thanks so much for posting.

[@alansauer6853]

Hi. I watch all of your videos. I don't know if you answer questions, but I have a question about my 2004 2.0litre Jetta. It just started to run a little hotter than normal. The temperature always ran with the gauge straight up in the middle. Now its more like 1 o'clock. I changed the reservoir and cap because there was small leakage around the return line. I also bought a thermostat and a coolant temperature sensor. What does the sensor do? Does it control hi and low fan speed?. I'm not sure how the cooling system works. Thanks

[@michaelsullivan8934]

Thanks for all the videos! I have a 2008 mkv GTI, fsi engine. I just developed a bad coolant leak a couple of days ago and it seems to be coming from the lower front area of the engine. Where should I start looking?

[@TommyCubed]

Its probably the radiator. I had something similar on mine and it was a busted radiator.

[@sollykhan2385]

Thanks for this really 'COOL' video Henry,as ever great content man, keep on posting these 'COOL' uploads 🙂

[@scottlinder2258]

Thanks for the video! Saved me some dough and a trip to the dealer for something in my wheelhouse!

[@marcusag2733]

Hey Charles. I have a 2004 vw touran 1.9tdi 102hp. After a new head gasket, water pump, timing belt and a lot of other small stuff, I have a problem with my coolant. After 15min of highway driving I get a low coolant warning. And when I check the coolant tank is empty. Unscrew the lid and all of the coolant comes back. What do I do?

[@brandonmazariegos1412]

MK4 I have boils and the coolant antifreeze presure and wanna come out. What do you think it's the problem?

[@richard66754]

This would be a great video to launch off into VW coolant system woes. I had a coolant light and a p2181 error on my daughter's 2003 Beetle. I replaced the reservoir and still had the coolant error.😬 it ended up that the thermostat was stuck open and the engine wasn't getting up to optimum operating temperature. The water pump wasn't suspect because we had already replaced that due to a broken plastic impeller and previous coolant error. All said and done, we still love our driveway full of VW cars!

[@maxvorobey1316]

So I had my ac on high blast in my vw golf 2013 and it was a really hot day. After about 15 minutes, the coolant light came on, and the engine temp started going up. When I looked at it I found spilled coolant on my headlight, and around the coolant bottle, along with some spilled below it. There was also a puddle right below it on the ground. Was this just the coolant bottle spilling coolant from the pressure? Or is it something worse like a pipe or a plastic flange? Thanks!

[@brianvazquez6854]

Max Vorobey same question did you ever figure it what it was?

[@amcrae1]

Can you tell me what the voltage is supposed to be at the coolant bottle? and THANKS for the video!

[@bryanyasuhara2994]

Doing mine tomorrow. Thank you!

[@KittyCakeHate]

Thank you, very detailed information. I am about to check it and I am praying it's not the connectors.

[@BryanKnight877]

very cool, I'm pretty sure I have this exact problem on my 2006 Jetta TDI, the low coolant light comes on when the engine is cold, but if I turn the car off and back on again after it warms up slightly, the light doesnt come on, and the coolant reservoir is full

[@pwollerman]

Same here - did cleaning the electrodes fix it? (OK - 6 years ago but hopeful : )

[@christopherhaislet6460]

2005 beetle convertible gls 1.8t Coolant leaks out when outdoor temperature drops down. Gonna replace coolant bottle. Any other things I ought to look for? Will Fiberlock help ? Getting tired of this problem, have spent so much to .are this car run good !

[@JavierGomez-lh8uj]

Hey man, so as I'm coming home from a road trip today I got the coolant light go off, maybe 10 mins before I got home. A hose broke off from the nipple it was connected on. It's a hose that is on the right front side of the engine bay on my mk6 gti 2.0 tsi. Right next to the air cleaner box...was wondering if you might know the name of not the hose, but what it was connected to?

[@kluwe801]

Will the coolant bottle In the Mk4's make the low coolant light go off? I checked for leaks their is none. I've used Pentofrost SF coolant. My Jwagon has been going through a lot of coolant lately..

[@RahulSharma-lw3ei]

HumbleMechanic , I have a trouble with my vw Polo 1.2 MPI (Petrol) here in India. Recently, i am observing some weird engine RPM while driving. My observations are as follows: 1) At cold start Engine RPM is 1300. Then, it falls down to normal 900 range after a slight warming up. 2) When the vehicle moves, in the 2nd gear with an RPM close to 2000, and if i leave my foot off the gas paddle, the RPM hesitates to fall down immediately. Basically, it stays at its place and starts to fall after say 1.5 seconds. Same goes with all the gears after that. 3) RPM up : Gas Paddle Off : RPM needle does not start falling, but stays for a sec and then begins its fall. 4) Later, when the engine is up and running for a while and if i stop at a traffic light, in neutral, the RPM stays at 1200 and does not come down to normal idle(say 900). 5) If, i press and release the gas paddle once or twice...then, somehow sometimes, it returns to 900. . P.S. I took the car to VW show room and they said car is normal after driving. But these fluctuations are definitely not normal. I tried to correct it by myself, i cleaned and checked the air intake filter(it was clean) Opened up the throttle body pipe, and cleaned up a little carbon deposited around it(with engine off and gas paddle pressed with key on). Still the problem stays. However, cleaning throttle body intake, made the gas paddle responsive. Initially with the press of paddle i was not getting an immediate RPM up too. This issue is fine now. Please help if u can. Pardon me for such a long query . Thank You.

[@swifty7449]

Can the deposits in the coolant tank/bottle get loose and flow around the the engine or water pump and cause damage? Also are the any how to vids to help me replace my bottle and coolant flush and refill? I have a 2013 Passat SE. 30,000 miles. After a service the VW service center they spotted coolant deposits in the bottle and recommended a water bottle replacement and coolant flush.

[@martyray518]

I just changed my coolant , fresh and clean . It’s still running hot 200 to 230 . Normally it would run at 190 always . What do you think ? Water pump ?

[@24BLUEELMO]

hello . do you know the adaptor to screw on needed to pressure test thesecooling systems?

[@kevdub11]

Hey y'all, I just replaced a few cooling system hoses on my diesel 1986 Westfalia Vanagon but wasn't sure which wires go to which poles on the expansion tank sender. Any tips?

[@StevenPatrick]

hahah u rock dude i been workin through this problem for the last week ... I even parked the vehicle thinking it might over heat and was getting ready to go buy a new thermostat , heat sensor and water pump just to say hey these are all new ........ and i should probably do that anway but thats another day so the first time i checked the level in the coolant bottle the car was running and it looked fine ........i just went out and checked it while it was cold and not running and wa la sure enough it was low so i filled it and started it up and bingo no more red light ........ sometimes its the little things in life that make you feel so stupid lol but thanks for the video you saved me money for the time being yet i will replace all the cooling components soon ......... u saved me time and money for now and released some of my stress hahaha

[@yugnoswam4]

Do you know what pressure the cap will start to vent at with these bottles? Looks the same as a '15 Audi A1 bottle.

[@twocups8994]

Hey Charles I know this is kind of an old video , My coolant bottle has changed color to a dark brownish kind of orange color I'm not getting any lights on the dash but do you know if I would have to replace it?

[@abepenner4714]

Did you solve this? My car has the same thing

[@kilovwdude6457]

It’s fine but the discoloration means the plastic is being Eatin into id replace it if you are worried about it

[@Mikeyk07002]

Question, my coolant looks dark and has a bit of foam or bubbles on the top. Will flushing it resolve this.

[@HumbleMechanic]

Might have to flush a few times but probably

[@thejezta]

hi mate I have an audi b5 1.9tdi on 2001 plate just wondering why there is third connection for a coolant pipe underneath the filler cap is this a vent of some kind or am I missing a pipe somewhere for reference my engine code is alm thanks dude

[@RyhnoMight]

would you recommend that coolant flush product and they fill with my regular 50/50 mix or is just distilled water probably just as good? Also I see people all over KZbin pour in their concentrate then their water to get the 50/50 mix, but shouldn't it be mixed in a separate container first or does it not necessarily matter..?

[@rhondawoodhouse5508]

I was told by VW parts department employee to mix equal parts of water/coolant in separate container, then pour into the car coolant bottle! Hope that helps!🔔

[@su3zero]

Hello there!!! I'm having some isses in my b6 2010 passat TSI. At cold mornings (10°c here in Brazil) when i start the car, temperature light start blinking. The cooling liquid is in propper level and the car temperature goes up till 90ºc and stay there. If i turn the car off and start again the light stop blinking..... is it possible to be this bottle issue? Thanks, and sorry my poor english.

[@RonaX]

Mostly, yes. I have the same issue in a Polo 2007. I'm thinking to change the bottle as well.

[@1988DERBY]

Hello I have Polo 1.2 12v 2001 when car is cold the water level is on Min and when it reach the working temp it comes to Max . what could be the issue, maybe air pockets, does this system circulate water by it self and remove air from system i dont know . All suggestions and advice's are welcome . Thanks

[@vishalodedra]

Hello, My 2013 Audi A3 kept losing coolant after every 100-200 miles. Would deposits on the level sensor be responsible for this? It’s seems to have stopped after I cleaned them. Cheers

[@ZSMGG0723]

I am losing coolant from my reservoir however the car is not overheating. I have checked and have others checked and still can't find where the leak is occurring. I have also change the coolant bottle and still experience the issue. Do you have any advice for me in terms of what I am missing or need to check?

[@wuwade33]

my vw 2000 beetle I replaced thromast and fill coolant in bled air out couple days later when I drive like 30 to 45 mins I got red temp light blinking and shut down the engine and let engine cold a little bit start engine drive 30 to 45 mins the light comes on sometimes on sometimes good coolant level is good no leaking found what is the cause the red light on? coolant bottle?

[@ignacioguerrero6134]

Hello humblemechanic I have an issue with a 2004 Volkswagen Beetle engine code bgd can you give me some advice on a alternate oil pump I have price shock or is it just easier to do a engine swap

[@higgs1991]

Any suggestions as to a csr not overheating but losing coolant. No visual leaks. Changed thermostat and coolant temperature sensor housing. It gets really hot but doesn't overheat... Which I find strange. No sign of coolant in the oil or vice versa. Any suggestions would really help. Vw golf mk4 1.6 akl

[@davidzaletchi657]

Very helpful information! Thanks

[@omnizen]

My mechanics worked on my 2003 VW Passat 2.8L GTX cooling system to find and repair a leak. A couple years later the heater core was replaced after removing the dash. I am fairly confident the coolant system was completely flushed both times. But after the first repair, the coolant bottle swelled up and developed a crack on top. The coolant bottle was replaced. After replacing the heater core, the coolant bottle again swelled up and developed a crack on the underside. Sometimes when I stop the car, steam comes out from under the hood from the coolant dropping on the hot engine. I have to top the coolant frequently. After the second repair, I replaced the coolant temperature sensor myself but did not burp the system. Now I know better. But do you think the swelling and cracking coolant bottle could be from air in the coolant? The gauge on the dash indicates the car is not overheating, and there is no problem with the heater core for cabin air. Any suggestions are welcome. - - Also, could you discuss how the VW Passat coolant bottle cap functions. I have come to the conclusion that the cap opens and accepts air into the bottle after the coolant in the radiator cools down and creates a vacuum in the coolant bottle. Looking through the cap opening, there is a small side compartment with a drain tube down the backside of the bottle open to the ambient air pressure. Somehow the air must get into the center cup in the cap after the plug is sucked down, but I do not see any openings or even pin holes. I cannot find anyone on KZbin or Google describing the function of the VW coolant bottle cap.

[@rickreid81]

Great video! Thank you. Very helpful. I will be using Deutsche Auto Parts in Future. They have a store less than a hour from me.

[@HumbleMechanic]

Oh nice. I’m on the other side of NC

[@OscarGagliardiJr]

Great video! Thanks for sharing.

[@hamkaothman7803]

Is there any problems if my coolant level is above max? Do i need to drain it? My car is audi a5 2013. Thanks

[@tusharin1984]

Dude, great video. Yesterday my wife, son and I were getting ready to run around. Backed my car out of the garage (2012 Passat SE V6 B7/NMS platform) and the light started blinking. The coolant is below the min in my resovoir so I headed to autozone today to pick up some pentosin pentefrost e. Manual says that light is a coolant system malfunction. I’m surprised there wasn’t a a low coolant warning light that came on, however my wife drives it daily and hopefully she didn’t over look the warning light. Being that the light flashed however based on your video I will look at the contacts and see if they are gunked up. There is approx 70k miles on the car.

[@darinhill6543]

So upon further discovery: when i went to add coolant to top off the reservoir, the first thing i noticed was that the cap was loose. This was probably done during the last service at the dealer. I'm assuming i lost coolant due to evaporation?? I guessed accurately at adding 16 ounces of fluid (8-oz coolant, 8-oz distilled water). My next question is since the system is to be pressurized, would there be contingent damage due to the cap being loose? Any thoughts ?!?!

[@pederfree1251]

Is the silica bag still something that is seen in the coolant bottle, on new cars? I have a golf 7.5. It doesn’t say ‘mit silik at’ on the bottle...and i can’t really see any bag inside...? But should i empty it to be sure?

[@grahamball364]

Great video and very helpful going to give it a go ,thank you .

[@mykkeau]

My 1985 mk2 doesn't have any lights for warning me about low coolant levels and such (It has 4 lights total, power connected / warning light for engine running too hot / oil low / high beam), I just check all its fluids monthly, works for me.

[@matthewcarter232]

Regarding coolant, how often should it be replaced in a 2014 Diesel Touareg? Don't think there is any mention of it in the maintenance schedule? What type of coolant is required and are there good aftermarket alternatives? Thanks

[@HumbleMechanic]

I’d do 100k. Either Peak OE, VW, or Pentosin are my go to

[@BeeShopcs]

For my Audi the square one I have changed it 2 years before. Issue was the return side broken. But it's good 11 years life in area which 50+ cc 3 hot seasons.

[@derekkchung]

At what resistance of the coolant would the temp light start flashing? Is it temp related/calculated? Only the pink OEM coolant has the right resistance? What if RO water is added to the cooling system?

[@LynxStarAuto]

The tank only relays coolant level. Not temperature. Temperature comes from the coolant sensors located elsewhere in the system.

[@leeverink32]

Hi my mk1 looses coolant on top but im not sure from where could it be the cap? The rest of the hoses seem fine. I do smell coolant in the car when i turn the heater on could that be the dash radiator? I flushed the coolant and found a grey molten tube like kap no idea where it came from every thing acts normal any ideas?

[@AdrianMartinez84]

Hey Charles, How difficult is to do a coolant flush? Need to do one on a 2012 Beetle Turbo. Thanks for all that you do!

[@HumbleMechanic]

+Adrian Martinez not too hard. Many times a drain and fill will do the trick on a car that new :)

[@diegojaimes8008]

Theres a plug at the bottom of the radiator which allows for easy emptying

[@Nikolias007]

I have a 2003 beetle 2.0 and I replaced the coolant bottle and ECT with after market parts and they don't seem to be functioning correctly is this because they are cheap after market parts or a deeper issue?

[@Brainiarc7]

I’ve had a similar issue with a Touareg. Replacement coolant reservoir tanks kept exploding.

[@nikoabednego1734]

Please help i hv water coming out tru a reservoir breather on my vw polo while am drivin bt the car does not overheat ,fan turns on fine at 90 degres i changed the reservoir cap bt nothing changes what could be the cause

[@TylerPKegger]

My temp light came on and the liquid inside my coolant bottle was boiling like water on a stove, any ideas what could be causing that issue?

[@manuelsarria1377]

On a 2008 vw beetle how would you know if you are overheating know gage??????? I changed my bottle it was licking, but how would I know????

[@nelon5234]

Do you think that a crack-leak in the bottle would also cause the engine to idle higher? 2010 MK6 Golf TDI far from stock. My drives are short so I think the battery is just not getting charged, but it is a VW!?

[@djansen2442]

This video is awesome. You just saved me like $200 worth of gravy work at the shop.

[@PanamaSticks]

So does the coolant evaporate, or does the low level indicate a leak, or worse, coolant getting into the engine?

[@danyo1972]

Doesn’t evaporate, closed system. So if coolant level drops you have a leak, and hopefully it leaks externally otherwise you are in trouble.

[@furn9160]

my mk4 jetta is having a problem with the cap its lose enough to allow it to depressurize and allow the coolant to boil should i replace the bottle or just the cap?

[@LastHumansTech]

Is filling a mk7 gti cooking system as simple as just filling this reservoir? No bleeder valves like old Honda’s?

[@HumbleMechanic]

You really need to use a bleeder. They are a pain to bleed

[@chrislavigne1212]

What are the most common prone coolant leaks on vw. Specifically a new beetle? The wife has one and i cant seem to find it. And there is a spot on the ground so not looking like an internal thing.

[@802Garage]

If you have time, I have a question. If I'm using one of these expansion tanks in a project, do you know of any way to use the coolant level monitor prongs to set off a custom light? As in, I have the expansion tank, I have an LED. How do I get it to turn on when the coolant is not touching both prongs? Apparently the prongs are usually connected to something which monitors resistance, and when the resistance gets too high, the light turns on. Creating a simple circuit to do that seems complex. Typically the job of a micro controller. Would be much easier if they connected when coolant dropped like float sensors work. I was thinking, I could just use a normally on relay and use the two level sensor contacts as the switch lines for the relay. As long as there is coolant, the relay is switched to off, meaning no light. Coolant drops too low, resistance becomes infinite, relay returns to normal on state, light goes on. My only concern is I will be passing current directly through coolant. Obviously a very small amount, typically in the 200mA or less range. Just not sure if that can have unintended consequences in terms of electrolysis. As long as neither contact is touching coolant, it shouldn't pass current through the whole cooling system. I realize there is a low chance you'll see this comment. Maybe I'll hit you up on social media sometime. Just figured it would pique your interest if you do see it. Forums were not helpful and I figured if anyone knew, it would be you. Thanks for the awesome videos!

[@802Garage]

I think part of the solution may be putting the relay in the power side of the level sensor wiring. Provided both sensor pins aren't touching coolant, resistance should be so high that the relay does not switch and therefore it should pass nearly zero current through the coolant. As an additional precaution, I could use a MOSFET instead of a relay. It should draw such low Amperage that current through coolant is a non issue, especially since the reservoir and connecting hoses are plastic. Since a MOSFET is Voltage switched, provided there is high resistance, it definitely shouldn't switch without coolant present. I'd need to make sure the resistance through coolant wasn't so high it would never switch though. At any rate, if you have more insight, please let me know!

[@rudolfhuijs4526]

Are you the guy who made a Scotty Kilmer parody video?

[@802Garage]

@@rudolfhuijs4526 That is indeed me!

[@rudolfhuijs4526]

@@802Garage That video made me laugh like mad all the way. Then at the end the gas tank goes nuclear and I was pissing. Cheers man!

[@802Garage]

@@rudolfhuijs4526 Hahaha thanks a megaton! Maybe I'll make another one someday. For now focusing on cool engine swaps and all that. :D

[@emiliomartinez3201]

I have a Gti 2.0l turbo and have a problem with coolant circulating, what do you think I can check?

[@snoopy5736]

Did u ever figure it out?

[@Chris-zg8rk]

I Have 215,000+ miles on my 2004 Jetta TDI, got the coolant light and ended up being a leak at the small hose. Speaking from experience...TAKE YOUR TIME CHANGING THIS RESERVOIR- The parts of the reservoir that connect hoses/connector were VERY brittle. The old reservoir doesn't matter but the job is way harder and longer if they break on the inside of hose or even the connector clamp. Cheers and good luck!

[@flemming725]

Hi. My son has a 2014 Passat and use`s coolent.Theres no white slime in the oil cap,no pressure an oil resudue in the coolant tank.When the weather was cold white smoke came out of the exhaust. Now in the summer theres no smoke. Do i have to change the headgasket?

[@robinamusic]

PLEASE HELP! I just pulled 2 floating “filters” out of my coolant bottle from vw scirocco.. was wondering if I needed them in there? Or they’re pointless.. they seem to be making it corroded

[@bubblebubblegum2732]

Yes. Mines keep leaping out.. I fill it then it is gone 2 days later... and my overheat light keeps flashing when it's hot

[@simentalg]

I have 2006 Jetta flushed coolant and replaced bottle, the red temp light still there all new parts used any ideas

[@moisesjl75]

What would cause the lid to keep shooting off? Just looking at a second hand mk4 and the owner says the cap keeps blowing off. Apparently the engine temp still sits at normal 90 degrees Celsius (or half way mark). Would a flush and new expansion tank fix?

[@AK-ir1xl]

If the cap keeps shooting off then this indicates too much pressure which could be two things 1. Faulty cap 2. Blown head gasket

[@wesleyhurd3574]

I'm wondering if the electronics monitor the coolant level circuit for a low resistance (high conductivity) condition. In other industries, conductivity is used as a measure of the impurities in water. High conductivity would indicate a high level of impurities (or a short in the monitoring circuit).

[@alirezaashtiani8519]

Hi, my 2012 jetta 2.0 gas is losing coolant, it leakes right under this bottle on the ground, any idea where to start looking for the cause? Thanks

[@robertgreenfield9051]

Replaced one today that was so corroded it didn't even register continuity

[@aswanation]

Hi, Is this same bottle used on mk3 golf?

[@HumbleMechanic]

Similar, but not the same

[@KillerJoeFIN]

What is recommened pressure for testing Volkswagen coolant systems? I allready have pressure tester and vacuum refill kit from ebay with adapters. And do you know how many pascals is safe to use when testing coolant system with vacuum or vacuum refilling? Is there any adapters for Volkswagen coolant cap pressure leak testing?

[@KillerJoeFIN]

My test kit only has test adapters for metal pressure caps. Im looking adapters for Volkswagen caps. Not for reservoir... For caps

[@brandondayer2623]

Hello just a question I have coolant light flashes but only when I get up to 60mph plus then when I'm back below 50mph turn engine off and on again it stays off until I go above 60 again

[@Nick_G7IZR]

Would you take the silica bag out before they split?

[@kerolesnashed4729]

I have 2003 VW passt v6 one time I have coolant leak on the passenger side after searching on where is the leak located after loss the Catlic on the passenger side find the leak on the body of the car question mark how that's happen leaking on the body ? If you have any answers please help

[@threestoges3]

I loved the video on coolant bottles. Very helpful. Thanks a lot.

[@aaroneverett296]

I need to stop watching your videos. Everytime I see one I think I need replace something. So far I'm replacing the valve cover, vacuum pump, and map sensor. Luckily haven't seen any sign of this failing.

[@HumbleMechanic]

Lol don’t stop!

[@jasoncameron34]

Charles or anyone who can help i have an 02 jetta 1.8t my spark plugs are getting coolant on then im thinking bad head gasket? But no oil in the coolant ball could the head gasket be bad or should i check something else out? And also doesnt overheat either Thanks

[@Droning_on_ak]

So my reseviour in my 1990 Jetta 1.8 keeps "boiling over" everytime the engine warms up. It's not over heating, but as the engine gets to tempature, the coolant raises to the top of the reseviour and pours out of my overflow holes? Any ideas what it could be? I'm thinking it might be my level sensor? Or the reseviour cap?

[@JohnnyMacaw]

Ben Poelman did you over fill it over the max line?

[@weman5390]

Where does the coolant bottle contacts get voltage from or do they not get voltage?

[@208flatbedOO]

Any tips on replacing the trans cooler o rings on a 2014 passat 1.8 tsi?

[@sy7zx]

I've got a coolant leak, but I don't see anything under the car, it's happening once a week or 2 to pour some coolant into the system. Is it the bottle the problem? I've changed the water pump and timing belt recently, now I am thinking the problem it might be the bottle or flange or do a total flush of the coolant, I heard that help to fix the problem ( hopefully it's not the head gasket, I don't see any blue smoke from exhaust pipe). Can you help me with suggestions of what other common problems could be in a coolant leak on an audi a3 2.0 tdi 2007? Thanks

[@HumbleMechanic]

Maybe the EGR cooler?

[@vr6caddy843]

Hey Charles, paid subscriber now. Need to ask, VR6 going in my caddy soon, can I replace my coolant bottle with an aluminium one?

[@HumbleMechanic]

awesome!!! You can use that. They look cool. The only issue I see is not being able to tell the level

[@DavidGarcia-jf5jr]

Hi. So I have a 2017 Tiguan SEL 4MOTION, I'm at 72k miles. My coolant keeps dropping fast and i have to top off every 3 days and I'm California and the weather has not been very cold or hot. I don't see any leaks anywhere, so I'm at a loss as to what it could be. Could it crack and evaporate instead of leak?

[@clint1285]

I have 2014 tiguan. Can't find leak.....1 garage replaced radiator. Still leaking....

[@angelramos4788]

My car randomly purged all my coolant through that overflow tube you mentioned, never had any temp problems before any thoughts?

[@HumbleMechanic]

Seen a head gasket do that a few times, also seen a few bottles fail that way

[@angelramos4788]

HumbleMechanic I don’t think it’s my head gasket. Filled the coolant back up and tried to see if I could get it to repeat and it’s been running fine for a month now since it happened. Thankfully happened in my driveway while idling so I was able to shut car off immediately

[@edsheeran2994]

Daryl Ramos did you ever find the solution? My car just did the same thing

[@louismartinez213]

Can a crack on one of the hose plugs be a cause of a leak?

[@MarioRedd-wi7gb]

Thank you for this. hey my bottles is not hold coolant but no signs of leaks. The inside of my bottle is like pink dirt inside. How can i fix this

[@seanog00]

I have replaced the coolant bottle in my 2002 VW beetle after noticing a leak from the coolant bottle. Now though the issues I have is that when under pressure the coolant disappears from the coolant bottle and comes back once I open the bottle can you please point me in the right direction. The collant pump was replaced aswell recently. thankyou!!

[@JazzCabage]

This is intended. The coolant will return to the bottle after you shut it off for awhile. When you take the cap off while it's still pressurized it bubbles back up violently. This is dangerous because it can overflow and burn your hand. Stop doing this.

[@Ovrful]

I have a problem with skoda 184bhp 2.0tdi. Its loosing coolant, mostly during dpf regens or hard driving. I have checked oil level, oil cap and everything seems ok, car performs flawlessly and i just cant find where the coolant is going. I can go a while without loosing any coolant and then at some point the level drops.. Had to top it up a few times... Any idea?

[@daemn42]

I had the plastic crack around the coolant return, replaced the bottle, and now I'm losing coolant at a furious rate, but don't know from where. It seems to be collecting on the rim around the middle rim of the bottle, but have never managed to catch it actually coming out of anywhere. It's gotta be the cap or the overflow tube, or the sensor port.. but that narrows it down not at all. I tried a new cap and it doesn't *feel* like it is as snug as the original one, and leaking just as bad (if not worse). It's like the tolerances of the new bottle opening just don't match the old or new cap.

[@dexterhill9122]

I have a VW cc 2010 This car is so weird I have a problem when I drive the car and turn it off about 3-5 times depending it will start up and when I go to drive off the car will cut off then when I try to start it again it will start and cut back off like it's not getting fuel. Had it at the VW shop twice the first time they replaced the High pressure fuel pump. but I still have the problem doing the same thing. but they say everything check out on the codes. But they cant seem to fix the problem. Can you help please.

[@kamakaziozzie8379]

Thanks for the video! You provided me with helpful troubleshooting info for my Mk4 Jetta flashing coolant light. Good stuff!