Thermostat Replacement and Cooling System Upgrades

Thermostat Replacement and Cooling System Upgrades for a 2004 VW R32. This thermostat replacement will cover all 24v VR6 engines. This will also cover thermostat housing replacement and coolant transfer pipe or CRACK PIPE. This thermostat was failing, but some how there was not a thermostat housing leak.
~~~~ PARTS USED ~~~~
Coolant pipe ~ goo.gl/95BBXs
Thermostat housing ~goo.gl/Yc6oCt
Coolant ~ amzn.to/2Gccm68
ECT ~ amzn.to/2pPqY0r
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Box wrench set ~ amzn.to/2FzoJch
ScrewDriver set ~ amzn.to/2FEjcgd
Shop towels ~ amzn.to/2FC7UgM
Torque Wrench ~ amzn.to/2I7ke5h
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[@HumbleMechanic]

If the video helped out consider subscribing ~ kzbin.info One note on the video~ When placing the thermostat in the housing, I mention a "DOT". That "DOT" is a bleed vent. ;)

[@Blaylock1988]

When I did mine I didn't pay attention to that dot (didn't know I needed to). The car has been running fine for a few months, is it something I should be concerned about?

[@HumbleMechanic]

It’s probably fine. I’m guessing there are some situations where it may not flow properly. But I wouldn’t worry much about it

[@oatmeal9164]

HumbleMechanic I'm so happy your doing all these mk4 repairs/upgrades, definitely gunna be referring to these in a few months

[@mattlucas7407]

Picked up some of those Blue Point locking hose clamp pliers on your recommendation from another vid. Those things Rock! Thanks for all the great vids, keep it up.

[@dylanpowell3213]

What about if you replaced the thermostat, water pump, and upper/lower radiator hoses and the car still overheats, I don’t have temp #’s but about 3/4 up the gauge, only going uphills though

[@manihamedi2357]

Just did this on my golf 4 v6 4motion and it's the exact same as the R32. Followed this guide and it made everything so easy. Thanks for the videos Charles! Keep'em coming!!

[@89yanii]

As someone with an aging 04 R32, your videos are an amazing guide. Thank you so much!

[@HumbleMechanic]

AWESOME!

[@therealderjett]

I really like that you gave an explanation for why you were doing the repair. Showing the fault code message makes this really clear for people who are new to the VW DIY community. Your camera work and editing makes this look easy. Another great video.

[@HumbleMechanic]

Thanks so much. Glad the codes help. The job is really not that bad. Like all VWs holding your tool the right was is the difference between an easy job and a bad day

[@BlueBox777]

This is the most complicated thermostat change I've seen (that I recall). Good job Charles!

[@HumbleMechanic]

The 2.5 is worse. Lol. The W8 is electronic and under the intake in the “V”. 🤷‍♂️

[@holidayhouse03]

Wow....a torque wrench in action. I'd heard about such things but never thought I'd see one on KZbin.

[@HumbleMechanic]

Haha I’m not a torque wrench nazi by any means. But I try to include it when I can. That said I can get 10nm pretty close most of the time. 😂

[@siamean1]

I torque everything down to 1 ungadunga.

[@David_Watts]

@@siamean1 Of course we all know the Honorable Charles H. Hungadunga, lawyer for Groucho Marx, set the standard..kzbin.info/www/bejne/lWOvoqCZn66Yg7c

[@gplusgplus2286]

Actually I think they're ONLY used in youtube.

[@gtr-heavenparts3525]

I just replaced my mk7 thermostat and water pump and it called for 11nm and I also used a torque wrench, I ain’t messing about plastic parts and torque values.

[@dmytrowp]

Yes!! Great video, had the same P2181 code. Replaced the thermostat because it was stuck open. Also replaced the OEM housing, green top, coolant cover, and the crack pipe. Upgraded the crack pipe with a 42DD crack pipe and managed to do so WITHOUT removing the manifold. It was a PITA, but it was doable. Had to do this twice since the o-ring on the pipe didn't seat properly the first time but I think it was still worth it rather than removing the whole manifold.

[@HumbleMechanic]

Man I hate the leaks after repair. The 42dd pipe is what the GTI HAS. :)

[@TheMatadrum]

This is the best video ever - Just wish it was around 2 years ago when I was fixing this issue on my V5 Bora. Oh well...

[@ExhaustedOfficial]

Great video, concise and informative. Good job👌🏻👍🏻

[@petecurran3995]

Great job, Charles! 👍🏻

[@RoguePlank]

Of course you've already done a video for this, thank you! My metal coolant housing and crack pipe are on the way, mine lost 2 litres of coolant over the weekend, housing leak against the block.

[@qwiklok]

Excellent. Learned a lot. Although I have a V6 and 2 W8 cars, the principles are the same. I now know why I had overheating issues, did not bleed the air properly, plugged rad and needed a flush. Man, I made so many mistakes. . . . . as said, excellent. And a few tricks like dielectric grease, hose clip pliers, a clip pick, removing hoses etc And btw, you have a great voice for narration. Audio is crystal clear, huge difference.

[@mattleggett9782]

Top draw video with ALL the info need to confidently replace my R32 thermo complete kit. Many thanks, great work.

[@1990lillulu]

You always make the jobs easier and explain everything necessary. Thank you again, and my car thanks you too!

[@HumbleMechanic]

Happy to help :)

[@mcawrse]

Nice work Charles. I just did the t-stat housing on my wifes 04 Touareg VR6. :-) Those aluminum parts look great. The first time I did the job I used an aftermarket plastic housing. That was a mistake, it leaked like a sieve. Lesson learned and now it has a genuine part and no problems. The parts house took the junk part back for a full refund.

[@HumbleMechanic]

Glad they gave you the money back. Some of that aftermarket plastic is awful

[@rsage_]

I'm all about using a little dielectric grease on those hose connections and o-rings. Love that stuff. I use it for all sorts of other stuff, too; like at the bottom of the battery terminals (between the post and the cable). It definitely keeps the crusties away, haha.

[@HumbleMechanic]

Yea man. I use it all the dam time. Lol

[@Toolaholic7]

See it with the GMs,Chryslers and Fords with the PO128 code too.Replacing the thermostat fixes the problem too when this code appears.The hose picks,Snap On makes the best ones now.A wide flat tip instead of a pointy tip to prevent poking holes in hoses.

[@jellevanonna1389]

Absolutly love this type of videos. Super clear and every question u might have is answered. I am about to replace my themostat on my mk4 2.8. This will help alot!❤

[@HumbleMechanic]

Awesome thank you!!! Super pumped to help

[@mentaldan666]

This calls for a 12 minute toilet break! Screw work. HM comes first 😁😂

[@HumbleMechanic]

Comment of the year!!!!!

[@mentaldan666]

HumbleMechanic Lol! This R32 is an absolute beast, and already looks wayyy better than when you got it. Sounds incredible too. Between this and the VR, I’m practically nursing a semi 😳😂

[@HumbleMechanic]

Well you did just spend 12 min in the bathroom. Hahahaha. Just wait until you guys see the suspension. It’s 😎😎😎

[@luisc853]

Thanks for this video Charles. It really helped me fix that DTC on my mk1 TT 3.2!

[@tullgutten]

I recommend everyone to get a vacuum filling tool for the coolant, it creates a 0.8 bar vacuum so there is no air left, cost around 50 dollar (Here in Norway at least) and is worth its weight in gold. I use it on every car at work, and it doubles as a leak detector when you cant get vacuum because a leak. Takes around 3 minutes to bleed with it and 0.1% chance of overheating or having to refill more than 0.2 liter after driving instead of filling and having to rev the engine and drive until it is hot and refill again that might take over 30 minutes on some cars or even having to wait to it is cold again.

[@ferfire9]

I think its worth mainly if you work on many cars. But if you care about your money and only have 1 /2 cars at home, its just not needed, at least with VW cars. My car bleeds itself without much trouble pretty fast, 2 or 3 runs and the air is all out.

[@tullgutten]

i have 3 Audi XD and my dad has one, i think even for a home mechanic it is gold, saves much time and you can loan it to friends if they need it. at work we have 2 but I had felt the need for having my own as well, as I prefer to be 99% sure the engine wont overheat from a lack of coolant since that happened to me once before I bought the tool

[@glahut93]

I used the airlift brand but still can't get all air out .Now my bottom coolant hose is cold and car runs hot It has new fans,new water pump,new thermostat and new radiator.

[@MyJarrus]

nicely explained in depth

[@TheDaf95xf]

Absolutely brilliant your way of working looks so easy 😊 👍🏻 Stevie 🏴󠁧󠁢󠁥󠁮󠁧󠁿

[@Sooperdooper74]

Awesome! I stopped everything to check out the majic. Yes the V-dubs, can be a bit hectic with hoses and wires. Great Job!, and thanks!

[@HumbleMechanic]

💙💙💙💙💙💙

[@RoguePlank]

Thank you so much for showing where the little hole goes in the thermostat

[@broadband1912]

very informative and clear information thank you. Going to attempt my golf r32 now thanks.

[@yafte95]

Thanks man, this video was super helpful! Extremely clear demonstration on this rare engine! God bless you. Worked for Mk4 VR5 4motion

[@mikewiremt]

Something about pouring in some nice fresh G12 feels soooo good! Love seeing that color in the reservoir instead of green or brown.

[@HumbleMechanic]

:)

[@carlosmartinez-kl1ho]

👍👍👍👍 this video is going to come in handy this weekend

[@suj1945]

You have some of the best camera angles I've seen for demonstrating car work.

[@HumbleMechanic]

Thank you. 💙

[@jeffalsop5299]

Great stuff! Thank you for showing!

[@suesmallwood9794]

As always great information thanks so much.

[@bassistproducerpitbullgymc6734]

Man… you are the friggin best at making these diy vids make sense !! I’ve done all of my repair and maintenance work on my Tiguan with your help!! Would there happen to be a vid of yours for the Tiguan ( water pump / ect / thermostat replacement instructions)??? Looking like it’s gonna be my next project as I’m noticing the slow start up and slightly overheating when idle…

[@fernandomarquez5681]

Awesome you make everything looks easy hahaha

[@HumbleMechanic]

LOL, this one is pretty easy. The only tricky parts are removing the clamp from the crack pipe, and fishing the crack pipe in and out. But that is not too bad either.

[@cmcolfax1]

Timing is everything... I'm about to do this job on my 2.0. I don't have to worry about the crack pipe, and things are a little easier to reach, but still a great how to!

[@HumbleMechanic]

Thanks. Be sure you replace the housing too. 100% chance it will leak if reused

[@cmcolfax1]

Yup. Got a nice box 'o parts from #autohausaz sitting here. Thermostat, housing with o-ring seal, outlet flange with o-ring seal, expansion/recovery reservoir with cap and seal and finally a new coolant temperature sensor...

[@chrisjones444]

My assumption is it’s the same steps for the 2.8 Trying my hand at this, this coming weekend. Aluminum thermostat housing, billet crack pipe 70c thermostat! Excited.

[@panzerveps]

Gotta love the VAG vacuum bleeding kit.. One of the few special tools that makes the job so much easier.

[@HumbleMechanic]

Totally agree

[@ginnyXP]

Excelent explanation! Thanks!

[@takeomack2782]

Another Great video my friend!!!

[@HumbleMechanic]

Thanks dude! 👍

[@fuenteskevin72]

Car genius, i can only hope to have half the knowledge you do.

[@rosesbite]

Thank you. I feel like I’ll be having to do this soon. Owner of a 11’ MK6 TDI. Brought my car to a mechanic to replace my timing belt. They did a flush and didn’t put the recommended G12 or G13 I’m my car. Instead they put the green coolant in my car. 5 months later coolant dash notification goes off because of low coolant -_- which either means I now have a leak or the coolant is simply evaporating in my cooling system.

[@christophertenley6654]

Great video, love watching you work on your vw, I was curious, as to the coating you put on the housing and crack pipe before installing, what is it and did you do it yourself

[@rodrigoalvarez8662]

real good tips thank you

[@Mellchior]

Another P2181 checking in! Mine is on a MKV GTI. Nothing like lukewarm heat all winter :D

[@stonewp]

Really enjoying these R32 videos. I have an mk1 TT with the 3.2 VR6 so a lot of these videos apply to my own vehicle. I’ve had to have the thermostat housing, temp sensor and o-rings a few times. My primary cooling fan just retired so I’ll be back in that area again soon. Do you have a recommendation for a silicone coolant hose kit to refresh all of the old rubber? Is there a reason that you painted the aluminum parts? Glad you picked up the R32. Keep up the good work.

[@shanecouty5316]

Hey man what’s the part number for that Tee piece you recommend replacing ?

[@alexmessina3383]

Hello charles, thanks for great vids!! Some advice please. I've just replaced coolant thermostat with housing on 2002 Mk4 Golf. It has the green coolant sensor and also an extra 2-wire component that connect directly to the thermostat in the housing. Trying to understand what the extra component does. cant find a PID for it. Believe it may allow PCM to trigger trigger opening at lower temperatures, or perhaps it is just a on/off signal to PCM to indicate when thermo starts to open??? Keen to understand its function and how it works.

[@Motorsportsgeek]

Man these VW designs and materials they chose makes me cringe and make my mercedes look like a toyota in comparison...No offence, great video and right to the point , upgrading what VW cheaped out on was a great idea and investment!

[@HumbleMechanic]

LOL, I don't take offense to that. I didn't make that stuff. HAHAHAHA ;)

[@chrishernandez2490]

ltwargssf R, What I love about your comment is that to a non-car guy, it would make absolutely zero sense. "That VW makes my Mercedes look like a Toyota" "What does that mean?? Is that a bad or a good thing??" But to any car enthusiast they know exactly what youre talking about. XD

[@JaguarDieCast]

I love your videos. I've been turning wrenches in my mk4 vr6 24v a lot this year. How hard are control arms on these?

[@HumbleMechanic]

They aren’t too bad.

[@tycosandoval4489]

I have a Audi TT mk2 with vr6 engine And I have to replace thermostat Is this the same procedure?

[@annieworroll4373]

This is reminding me of my Grand Am. Shudder.

[@naomithemarketer]

Awesome channel! I Just bought a 2003 VW Jetta and when the car is in idle it overheats would upgrading the coolant system solve my problem any advice?

[@993ts]

The piece you mentioned might brake in the beginning of the video broke on me once. I just bumped it while doing something not related to the cooling system and the next thing I know I was getting hot coolant sprayed on my face. Fun times.

[@HumbleMechanic]

Yep. Seen dudes get some nasty burns from that part

[@kimnguyen4059]

thanks you sir very good explaning this is the way to telling of all detell how to changed the cooling system please show me how to replace the thermostat on the jaguar 2010 xf 4.2 l 8 cyl

[@mmaviator22]

When you said at the end to check the bomb the next day for any air that may be left, what would the symptom be if a little air was still in the system? About to switch about all my hoses and housings in my mk4 gti, love your vids, btw my boss just got a mk4 r32, and I hate him! ;)

[@MrWoowootila]

I would recommend getting the Ross Tech Vag Com. When I needed to program 2 keys it was cheaper buying the keys and FOB's online, cut, and program myself with the Vag Com, than going to the dealer and buying and programing there. Then I had the software to reset and trouble shoot codes on my car. It payed for itself in one use.

[@HumbleMechanic]

VCDS is awesome.

[@cifamotanii4587]

Nice & Easy! As always! 👍😀 Ps Where did you get that cool torque wrench from bro? 🤔

[@joelaplnski5394]

Nice

[@thebrownguy79]

It ain’t no 8 valve... awesome video!

[@HumbleMechanic]

No it’s not. Haha

[@daRayofSunshine]

Great video!! I wonder if it's would be the same as mk5 r32?

[@HumbleMechanic]

Very similar

[@dustgr]

Just a quick question I have a golf 4 with the plastic thermostat housing and thermostat , if I ll change it with the aluminium housing + metal thermostat.

[@selflesswanderer]

I get to do this today. Have watched the video several times, not looking forward to the crackpipe at all.

[@stonewp]

Is there any concern with the little bit of dielectric grease used to lube the seals mixing with the coolant?

[@milosilic1456]

Great video Charles, love your work. Can i do coolant replacment and bleading procedure without that no spill funnel.❤

[@Badgertronix]

Milos Ilic it has a header tank, you don't need a spill free funnel

[@HumbleMechanic]

Yep. No need for the funnel. I had it and wanted to try it out.

[@milosilic1456]

HumbleMechanic, thank you man you are the best.

[@dyelan2010]

I always have leaks from the where the housing hooks up to the head ANNNNDDD where the sensors hook into the housing. I've been careful, and I still get leaks the first time. Second time with some sealer usually works but makes a redo of the job messy.

[@beerweather1566]

How important is cocking the thermostat in the housing the same direction? It’s not upside down. I just did this yesterday but I didn’t add coolant yet

[@rohankhosla-stevens6068]

Does the crack pipe just tight-fit into the thermostat housing?

[@Extendohh]

1:22 I need help, so the part/piece you mentioned that breaks, broke on my golf I have an mk4 vr6 12v and can’t seem to find the part I’m looking for, all I see is similar looking parts for a 2.0l or a 1.8t but can’t seem to find vr6 a specific part,help meeee.

[@full_metal2452]

Is it possible to swap out the coolant temperature sensor without pulling housing out of car or taking front end off and moving support forward on the mk4 2.8 vr6?

[@K03sport]

At least yours doesn't live under the intake manifold like in my 1.8t, such a pain; granted I don't have to deal with the xfer-pipe, but overall yours seemed 'easier'... Awesome stuff...waiting/wanting for mo.:Re 👍

[@kendromartinez5772]

K03sport 1.8t is like a 20 minute job lol. 30 minutes if you don't have a wobble extension and have to move the alternator out of the way

[@1971graverobber]

Question I have a 2001 vw jetta glx vr6 and can't find a coolant flange kit with all 5 pcs. I see individual pcs but very expensive separately please send a link if you know of one that are fairly inexpensive. Thanks again

[@braddowns17]

Great video as always. You always think of putting in the thermostat in the correct flow position but leave it to VW to have to clock the thermostat as well. Is it that way with all VW water-cooled engines or just a few?

[@HumbleMechanic]

I think the Vr is the only one that is oriented. I THINK! Lol

[@braddowns17]

HumbleMechanic Thank you I have a 12 valve VR 6 in my Eurovan based Rialta and plan on changing the pipe and thermostat when decent weather hits. Good thing to know. Thanks again.

[@Scouty208]

Is there any practical purpose for putting on the coating on the new parts or is it just for style?

[@bernardaflores1720]

What's the story w/ upgraded crack pipe and housing regarding fitment problems causing leaks. I have yet to replace mine on 2003 VR6 w/ 90K on it. Appreciate any feed back!

[@oxulucozcan4923]

Hello humble mechanic, newbie to your channel here, One question though, wouldn't silicone paste be a more appropriate lubricant? Isn't dialectic grease an electric insulator? Thanks in advance and have a nice day

[@rubenlarosa959]

HumbleMechanic first thanks for posting the videos and helping us, first , I have a TSI GTI 2009 i have a malfuction in cooling system Active/Static and I also have Coolant fan2 difficulty of movement/blocked this one Passive/sporadic.....any ideas plz....Me i l rather to do the most dificult task than start from the simple one...

[@oxdudepoege]

The shift cable attachments look awesome. What are those?

[@HumbleMechanic]

Yeah it’s amazing. kzbin.info/www/bejne/j4XJoZWamsRmibc

[@SETHNAMIBIA]

Awesome stuff! Your Thoughts on silicone hose kit for older cars? VR6 24v? worth it?

[@HumbleMechanic]

If you need to replace hoses anyway, then YES. But I don't think I would do it just to. I did them on the GTI. The fitment was MEH.

[@Catman1987]

The hose clamps , where did you buy those ? or can you leave a link in the comment where to buy some on Amazon ??? thank you .

[@jesselyons2002]

What do you do with the coolant that sprayed onto the transmission

[@HumbleMechanic]

Wipe it down or rinse it

[@soranrix]

since this is an upgrade will you put the dsg intake on the car??? it will need a reflash but gains are good and still oem, the lmm is 10mm bigger on the dsg version(same as the audi a3 3.2 250bhp) it´s officiel 9bhp since the r32 only has 241bhp. regards Sören

[@thepope4970]

Do you know of a 2.0 side coolant housing upgrade to aluminum? 04 jetta 2.0

[@DSperformance96]

When I changed the housing and crack pipe, i decided its better to pull the whole front of the car off.. just to swear a bit less..

[@HumbleMechanic]

That’s a great way. It’s how I had to do the mk3. The pipe was stuck in the block

[@RFM-]

Hi, what is the name of the plier you used for the hose clamps ?

[@dylanmckinney3405]

Great video as always. Why the dye electric grease tho? I know it creates a seal to help keep dirt and water out of as well as lubricates the plug on electrical components. Is it acting in the same manner for this application? Also, would the grease getting into the cooling system be any cause for concern or no because of the small amount? Thanks in advance

[@HumbleMechanic]

You nailed it. Purely a lubricant for the seals. I’ve been using it forever. Never seen any ill effect from it. I guess if you put a crap ton on it may. Haha

[@PerZonE0]

Hi! I've got problems with my thermostat on a GTI mk5. I've been googling about the location for the thermostat, and some say its on the left side under the alternator, and some say its on the right side like yours. I'm really confused

[@rubenretana6839]

Where did you buy your clamp pliers?

[@ezequielcabreravilanova4056]

Could I be able to fill my 08 A3 v6 with new coolant while it’s flat on the ground? How would I be able to burp the system.

[@DavidMortaz]

Wil I be able to tell if my 2013 Golf TDI thermostat is bad by reading the Temp on the Sensor? What should the temp reading supposed to be? It's taking about 15 minutes for the Temp Gauge to reach the middle and there is no HEAT coming inside!

[@S54VR6]

Think my valve cover gasket needs replacing asap. found oil in the spark plug sockets. Charles, make a valve cover gasket DIY! Please and thank you lol

[@vanterg3]

I got 2000 vr6 Jetta and Idk where the coolant is going it’s not leaking or anything it’s just going somewhere else in the car and I got thermostat change last month

The other day i was flushing my radiator fluid in my B5. That hose was just not coming off so i drained my fluid trough drain plug in the front of the radiator. Isnt that easier?rather that pulling hose clamps etc? I understand that you have to get to termostat so in this situation maybe but just Q i am wondering. Thx for the answer. Love your videos. Fan from Slovakia (:

[@joshcosta423]

Matúš Vápeník you don't have to remove the bottom hose and you can use the plug like you're saying but the hose is generally faster.

Darn those hose clamps. Hate them

[@bernardaflores1720]

I read some forums where they install a metal crack pipe only to have it leaking or not sealing properly. Is the one in your link the better one??

[@HumbleMechanic]

That I’m not sure of. I’ve installed a bunch and never had one leak. Often times issues like that are an error by the installer

[@vusa7]

Does anyone know if Eurowise still make these as the site say 12v AFP

[@nokenel]

Would these parts transfer okay into a 08 TT V6?

[@izaigarcia9202]

Is the some work for Audi A3 3.2 s ???

[@Treizez34]

I have a question as I'm running around trying to figure out a problem and am out of ideas... I just performed a coolant flush for my wifes Audi Q3 (2016 Quattro) and now I'm running into an issue where the radiator is not sucking the coolant out of the Coolant Overflow tank (this was also replaced for a brand new unit, btw). I definitely have coolant flowing into the heater core (as I'm getting really hot air) but the lower radiator hose is simply not flowing anything. We definitely utilized a vaccum bleeder/filler to load up the new coolant (even drained it again and performed a refill) but we just can't seem to get it to flow through the radiator. Any ideas would be helpful

[@loyalsoldiermac]

I’m getting a chirping sound from my mark 7 gti engine bay. It happens randomly and doesn’t matter if the ac is on or off. Any ideas? Vw has the car for a week and could not recreate the issue

[@HumbleMechanic]

Man it could be anything had a handful of noises be rattle under the cowl from the sound box

[@Andy-hi9do]

Hello, my Audi tt 3.2 had a p2181 code pop up. So I'm going to need to replace my thermostat.... great video. I noticed the shift linkage is aftermarket, is that yours? Or do you have experience driving it? How do you like it?

[@HumbleMechanic]

Yep it’s mine. Its a short shift kit from Diesel Geek. I did a video on rebuilding the entire shifter and shifter box in the car

[@hiemabedrog]

Has anyone made a billet aluminum blank block off piece for the sensor hole since?