VW B5: Passat 1.8T Thermostat Replacement 

Cooling system bleeding clarification: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ErLQbSnbOF4.html

Thanks for being so thorough in your videos. These videos helps to save tons of money and time.

Thanks for the video. helped me change my thermostat - was easier than I thought. Had to bleed the sysem afterwards though which was no big deal. You replied to another comment diagnosing a failed thermostat - had the same symptoms with my car - you nailed it! Car toasty warm and behaving itself again. Thanks again.

This is one of the best videos I have seen on You Tube for a repair. Thank you very much.

Thanks for the info & sound over, I hate when they can't just leave well enough alone. Keep posting

Thank you for good instructions! I have to do this operation to my Passat, before the winter comes and this video helped a lot!

These vids even help me on this day. My 04' Passat GL Wagon with the AWM 1.8T and 5-Speed Manual just wants to keep running. Unfortunately tho the thermostat likes to stay open so time to replace. Appreciate the walk thru. Replaced the coolant temp sensor not long ago and refreshed all the coolant in it. Figures the thermostat now wants to throw a fit. All good tho. Always ordered an extra jug of Ravenol. Live in Central Wisconsin, where it gets just as cold as Germany. Knew where the thermostat was, but it always helps to watch over another person to remind yourself of what is ahead. Thank you.

This guy is a total PRO. Respect.

My daughter has a 02 Passat 1.8T with 186k and you have saved me so much money over the last 7yr with these videos. Thanks man!!!!

Thomas, good job👍Thank you for the video

I did this job w/o removing anything. 1/4" ratchet 10mm w/ extensions got both bolts and a ziptie around the old thermostat to pull it out. Cleaned with paper towels and used a air compressor to blow out coolant from the bolt holes. In not a small dude either and could get my arm under the intake '02 Passat w/ AWM motor.

very good video. found out on my way home from my auto class it went bad. First gotta work on car for class and now I gotta work on mine.

Awesome thanks you make it look easy, your awesome at your job !

Excellent job!

Thank you. I was able to quickly confirm my judgement from your video that it would not be necessary to remove the upper radiator hose and belt and alternator like alldata says.

Great video, thanks!

There you go, thanks bro. Freaken thermostat

Great video will be doing one for my step brother tomorrow

So I just drove my aeb Passat for 30 minutes. It's 26 degrees Fahrenheit here in Michigan. It took almost the entire time just to creep out of the highlighted cold Zone. About 35% of the way to 190°. Then when I shut it off at a gas station for 5 minutes. I started it back up and it had gotten a lot warmer. Like the heat traveled through the motor. but then after 1 mile down the road back to where it was just above the highlighted cold area on the dash.

It took me 3 hours to do this and this guy does it in 20 mins😂

Great video! ! Can u give me a part number for the thermostat housing and o-ring please?

tengo un 03 passat 1.8 pierde todo el antifreeze por atras del deposito le compre el tapon nuevo y sigue iguaal la aguja esta en normal temperatura cuando traabaja despues de unos cuantos miinutos espiesa a llenarse el deposito y lo echa afuera espero tu consejo gracias

Good Evening Thomas. You may remember me😂 The VW has gotten me again either my thermostat housing has popped (gasket failed) or the hose right next to the thermostat blew out. And now im working on figuring out how to fix 👍

your a VW/Audi GOD! Love all your videos!

Awesome job. AAA has left me stranded with no tow. Maybe tomorrow, maybe not. Wtf? I got the thermostat, so looks like a midnight job on the side of the road with the help of your video. New sub. Thank you! You just made my night a lot easier.

Over all I found the quality of the information very helpful (Great job). Cons: Could use better video quality, the most ion of the camera was vey erratic and hard to follow. Thank God for the included captions. Thanks for your help!

Good video... i need to change my thermostat but wasnt entirely sure where it was (new to this platform of car, both VW and a turbo system). This showed me just how easy the job will be. So far, i like my car but it has been being a P.I.T.A. the last few weeks with breakdowns. First my coils failed (replaced them and drove great for 3 days), now i dont know whats going on.

Fast efficient educational

Fantastic video! Thanks for sharing. It's great to see work by people who really know what they're doing. (Got to get one of those hooks!) What was the red compound you put on the throttle body? I did this job by removing the alternator, and your way is definitely faster, but it gives you pretty good access.

Thanks for saving me a couple hundred bucks man

Forgot to mention at 16:00 that "no circulation of coolant" can be due to a faulty water pump. BUT, if you had heat BEFORE the thermostat was changed, then you should have heat AFTER as well... so most likely you have an air pocket that needs to be bled out.

Hey Thomas, Another Great Vid. will the Silicone make it difficult to remove next replacement? What type do you use?

Very useful video. However, I can't find that tool you're using to remove the two thermostat housing screws. I typed in 1/4" universal into google and a bunch of different things are coming up. Can you give me a link of what you're using?

HELP! First, THANK YOU for this vid - you saved me from being ripped off. Mechanics quoted me from $500-1,500 for this job! Would you please tell me how to get the thermostat housing loose from the radiator hose? It has no clamp I can see, and I need to replace the plastic housing. Thanks again!

Hey I have same exact car same year and all but quick question is there anyway to tighten up gas pedal I can’t seem to find throttle cable

Great write up. One question, what kind of grease did you put in throttle body before reinstall? Thanks!

grazie, molto chiaro. Un saluto

Nice video! just one question: What do you mean at 09:48 "do a throttle alignment with VAG-COM?

I prefer videos like this without music. i can concentrate better and this is how i work anyway

I am trying to remove the Tstat bolts on an AUG1.8T, but they are tight enough that either rounding the 10mm head of the bolt or breaking my 5mm allen key are potential concerns. These little bolts should NOT be high-torque items. Any suggestions?

Hello Thomas. Is the thermostat responsible for regulating the high and low speed of the electric/ a.c fan?

Could this explain why I have NO cold air at all ever and my heater works way TOO well? My check engine just came on last week (03 Jetta Non Turbo) and I took it down to the dude... says it's a P2181 code and needs new Tstat, which kinda makes sense. Never noticed my temp gauge overheating tho. Thanks for the video... you just saved me $200 :)

Thanks for the video! I have to replace plastic housing. Cant get the hose to release at all. Do you have any tips or tricks to get it off? please Thank you

Tengo un passat 2001. 1.8 pero se calienta mucho se pone rojo el convertidor y me quema la bobina

what do you mean by the flange should sit flush? im confused on that part.

Hey thanks for the video. I have a 2001 Audi A4 1.8 and I followed your video but my car is still over heating. I put in new thermostat and coolant. I had heat before I did it and after. The hose at the top is hot but the hose at the bottom is cold. Any ideas?? Thanks in advance.

I have a quick question off topic. I just got my condenser and dryer and pretty much whole AC changed, and now, I hear a high pitched sound. I got it changed about a month ago, and thought it was just the sound of a new system, but it's still there. It's kinda like a sqonking sound, and happens more when I down shift or low rpms. Any ideas or have you heard of this happening?

I was suffering genuine anguish as I watched the housing screws dropping off the key just as you'd almost located it! I'm not a professional mechanic but a DIYer and things like that make me swear!

also, how do i know if i need to align the throttle and what is vag-com/ vcds?

Thanks for this video. Iam assuming it shouldn be that hard to replace

So there’s the rubber gasket for the thermostat, and then an o-ring for the housing as well? I just replaced my thermostat because it wouldn’t open…the old one didn’t either but neither were installed with a housing o-ring since I didn’t see one with the old thermostat. Im assuming that’s where it’s pulling air into the system, preventing the thermostat from opening??? Thanks In advance.

I found a 2002 Audi A4 quatro 1.8t they said it had front end damage and the motor smokes they fixed everything cosmetic but I'm not so sure about the motor I'm thinking head gasket turbo burning oil or injectors stuck open I don't know what color the smoke is they didn't start the car because battery was dead the car is 1,800 is it worth it or would there be problems down the road

Do I bleed the heater core hose open the reservoir cap open too?

On another video the guy installed the rubber o-ring first (in the block), while you did it second. Does it matter?? I have a leak and have tried both ways with no improvement. And it is much more of a hassle on a Jetta!

I have a passat 1.8 4motion and it will not get 90 celicus only like 40-50. Thermostat issue?

Hello Thomas, I have a 2002 Passat with a 1.8T engine. When the outside temperature is 32 degrees or above, my car blows hot air and the engine temp gauge is around 190 degrees. When the outside temp is below 32 degrees, I get luke warm air and the engine temp gauge stays around 90 degrees. Could it be the thermostat or something else?

My Passat is leaking coolant from under the glove box out off where the fan blower is. The temp gauge is stuck on cold all the time ! Could this be because my thermostat is stuck on open?

first off im definitely not a mechanic. now that's out of the way I'd like to share my situation... radiator reservoir cracked while driving... car slowly started getting hot so I pulled over... Friend checked the thermostat and it was cold while engine was hot got it hot on my way home a couple of times that day but I would pull over shut it off wait for a cool down and then drive a mile and shut it off before it got too hot... though I did get it hot 2 more times but he said I was fine as long and engine oil has no coolant in it? it sucks not knowing about cars...my question to you is would you recommend I change the thermostat? waterpump? when I called this guy to change my reservoir he didn't bother to check the thermostat and said it was fine after a few revs but this was not the case because with my stop and go method home took me 4 hours for a distance of like 7 miles ...yes a very bad day for me for it had even warned the guy... but anyways.... what are your thoughts? and how much do you charge for a job like this? I was even debating on buying the radiator water pump and thermostat just so I don't have any more problems...

I just replaced my thermostat on my 01 Audi b5 a4, followed every step but didn't disconnect the throttle body since I have small hands anyways my question is my temp needle inside rises faster.. before on my old one it took forever to rise to the middle but this new thermostat I put on makes the needle rise up after a 5min warm up but the car doesn't over heat idk if that's normal for a car to do that but the needle stays at middle even when I turn my heater on and another thing I don't have heat and both heater ore hoses are hot and so is the lower hose for the stat as well and no leaks no where any ideas? ?Just worried about it rises quicker.

My 1999 Passat 1.8t aeb 5 speed is good in summer. Stays around 190°. But now in winter here, it stays pretty cold. Usually just above the 1/4 mark. But it does have descent heat. Not amazing. But I don't ever recall thinking I'm cold. I'm trying to determine if the thermostat is stuck open? Or leaking? But the car has been this way since I purchased it so I don't know how have these cars usually run in 25°F temps. Are they supposed to heat up to 190 and hold there or close still? I am also missing my belly pan if that can be taken into consideration for added cooling. The car has a APR tune, but I do not believe that would influence it any way.

Hi I have a 2001 Passat glx and the coolant bubbles out of the rescue cap and it overheats help please?

I have a 2005 passat wagon and it doesnt heat up while driving until after a really long time even after idling for a good 10-15 minutes, also no heat inside, could it be the thermosat?

I have a 2003 1.8 passat. The return hose fore the heater broke off, lost a ton of coolant. As a temporary fixed, we got the broken plastic piece out of of the hose from the connector on the engine side, slid the hose over the remaining plastic and tightened it down, no leaks. Now the car overheats only when driving, but not at idle. I refilled the, coolant, the heater is making heat without issue. Could this be an issue of not building pressure in the system first, or maybe a stuck thermostat?

What kind of silicone did you use for gasket?

me púedes ayudar con mi problema tengo un jetta 1.8t y en relentin suben y bajan las rpm. me indica mi mecanico que son los sensores de oxigeno

What year is this Passat ? My thermostat is not in the same place as the one in the video . Thanks

Hello Thomas. My 2003 Passat 1.8t a.c blower fan has been on and off recently. That's sometimes it works when I turn it on, sometimes it doesn't. What might be the cause?

Have a 2001 passat 1.8 t bottom hose was cold top was hot did thermostat still no heat and hose`s are the same any suggestions ? Thanks

I have a code of P2181 Cooling System Performance, my heat works so I dnt think its my water pump. Do you think I have a fauty Thermostat? Or could it be something else?

So I have a question... I replace the thermostat and the water pump. and I bleed the air... but I have overheat the coolant is coming out of the reservoir... I notice that the upper hose in the radiator is warm... ... I wonder What do you think is the problem.... Thank you...

my car is a passat 99 1.8 V4, but it doesnt have a termostat, its that ok?

Laik:)

Hi i have a question, i just bought an 04 audi a4 1.8t and i guess the seller took out the cooling fans cus some was wrong with them, so rite now im driving the car without cooling fans, do you think it will hurt anything now in winter? i know i will need to put 1 on in the summer. I have vag com and i scaned the car for codes cus its got a check engine light on and i get 4 engine codes P1931 P1672 P2181 P3081 thanks. and the heat works it doesnt get too hot but its hot enough i guess.

Hi, i have a problem of overheating, its a 01 passat 1.8 t, the other day i dont know how but the sealing cap wasnt on the tank and all the coolant gone, i refil with new coolant, but now the car overheat. What do you think ? Sorry for my english, its not my native tongue thank you

I’m havin over heating issue took thermostat out and it was stuck closed but when it over heated I had heat then when it heated up it went to cool like the air did so what could that be heater core or what ?

Dont these have plastic impeller in the water pump that starts slipping?

where did you buy your tools I. need the 5mm allen long arm and i can't. find it.

Would the process be the same on a 2002 1.9TDI passat?

Remove the throttle body? brilliant.

Hey. I have VW Passat 2003 1.8T and motor cooling temperature only goes to 75C. Termostat problem?

Go Pro is cool:)

can this cause the engine to run really cool if its stuck open?

i have a passat 2002 and its over heating. when i let it idle for a long time, im not sure whats wrong with it?

I don’t know if my thermostat is bad or not, my car overheats when I push it hard like in high way if I take it to over 4K rpm it overheats but quickly come back if I let the gas, it doesn’t overheat at idle and the lower radiator hose Is cold compared to upper

ok so my car is going through coolant flanges like crazy... every single one cracks... the head gasket was replaced 27k ago.. could this be the problem?

How do I bleed out an air pocket

I have a passat 1.8 00 , problems with sensor of temperature and lost potencial when i run it , wat u think is the problem

hi thomas,my thermostat not working but is good ,what is reasons.please

Por que se recalienta un audi a4 2001

Герметик там не нужен

check out this audi making a burn out ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-o9YT2_vtkV4.html

He visto vídeos peores.

What a stupid place for a thermostat

Such a badly shot video. Your camera is all over the place.