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2011 Tiguan S coolant flange replacement


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#1 OFFLINE   TommyBoy0329

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Posted 08 January 2020 - 06:49 PM

Purchased a used 2011 Tiguan S a couple months back (right before Thanksgiving).

 

The car was in great shape, looked like it was driven off the showroom floor yesterday except for some exterior wear and tear, but for a 9 year old car it didn't concern me any after all it gives me something to tinker with down the road. This is my first VW and so far, its a beauty!

 

-----

 

Unfortunately about 2 weeks ago, I noticed a small puddle (just a couple drops) under the engine and got concerned really quickly, it was pinkish-orange in color with a sweet smell to it and had me freaking out that it was leaking transmission fluid (I can do a lot of home repairs, but I am not going to try and replace that pan and seal gasket, especially on a VW which I am not familiar with).

 

I took the car to the nearest VW dealer last Thursday and they said I had a coolant flange leak and they wanted to do a complete flush and replace the flange for $375. I did a quick search and the flange itself is only $30 (I paid $32 with taxes from the parts dept at that same dealership) and removal/replacement seems pretty straight forward according to the internet (it must be true if its on the internet, right??). I am trying to save some money right now and its a relatively simple mechanical fix that I am positive I can do myself. All manufacturer and used dealership warranties are expired, so I really have nothing to lose by doing this repair at home.

 

I don't plan on doing a full OFFICIAL flush of the coolant at this point, as I just moved back to the US from overseas and I don't have the finances to buy all the special equipment to pressurize the system, etc (again why I am doing this repair myself). 

 

Again did a little research and it seems pretty straight forward...

 

- Replace coolant flange.

- Fill the coolant reservoir with 50/50 G12/Distilled water (until the bubbling stops, which is a good indicator that most of the air is out of the system.)

- Run the engine for 5-10 minutes with the cap off and let the coolant circulate through the engine.

- Once any residual bubbling stops and the coolant level stops dropping, fill the reservoir to the MAX line and cap.

 

Please let me know if I am crazy or not, but I think I can do this.



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Posted Today, 01:17 AM



#2 OFFLINE   shawng

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Posted 09 January 2020 - 01:16 PM

Sounds like you are on the right track. There is no need to purchase special tools to change the coolant. The coolant system is fairly well designed and there is little chance of getting air trapped


Shawn
2010 Tiguan, 2007 Golf, 1928 Chev AB National
Owner of an independent auto repair and performance shop.


#3 OFFLINE   TommyBoy0329

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Posted 29 January 2020 - 05:25 PM

Sounds like you are on the right track. There is no need to purchase special tools to change the coolant. The coolant system is fairly well designed and there is little chance of getting air trapped

 

Sorry for the late reply, I actually completed this project about 2 weeks ago. Removing the air box and locating to flange (took me about 15 minutes cause I was looking in the wrong area) was pretty straight forward, it was a super SIMPLE replacement. The hose clamps were a pain in the *, but didn't pose a big problem. The car has been running flawlessly and absolutely ZERO leaking. I'm stoked at how easy it was to get in there and replace.

 

Quoted at $375 by the VW dealer, completed by me for $60 +/-...that's a win in my book...

 

Next project is to replace the vacuum pump gasket, but it also doesn't look too complicated.



#4 OFFLINE   iangaryprice

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Posted 29 January 2020 - 05:52 PM

Hi Tommy,

What engine do you have in your Tigusn.

I am loosing coolant from my 2.0Tdi but cant see where it is getting out.

 

Where is the flange you have replaced?



#5 OFFLINE   shawng

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Posted 30 January 2020 - 12:07 AM

For a TDI with missing coolant and no obvious leak, best bet is it is entering the cracked EGR cooler and being consumed by the engine.

Shawn
2010 Tiguan, 2007 Golf, 1928 Chev AB National
Owner of an independent auto repair and performance shop.


#6 OFFLINE   iangaryprice

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Posted 01 February 2020 - 08:55 PM

For a TDI with missing coolant and no obvious leak, best bet is it is entering the cracked EGR cooler and being consumed by the engine.

Thanks, I will check that out.

Timing belt is due for replacement soon, I'll change water pump at the same time. That will rule out the pump, if it still leaks I''ll look at the EGR.

Coolant level has dropped from max to nearly min over the last 2,000miles, 2 months, not a lot but definitly leaking.






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