Failed Thermostat Housing/Coolant Loss Info Gathering

[aaronc7]

Mine was loosing coolant, saw the dried coolant down the side of the engine etc. I topped it off a few months ago to decided I wouldn't touch it for a while to see how long it took to reach the min line or light come on in dash etc., For some data to give to dealer for taking it in on warranty claim.

Fluid level dropped down to halfway between min and Max and has been there for months now, static. Not sure what to think lol.

Either way I will probably go ahead and replace it all if I ever take off the intake mani for MPI, valve cleaning etc.

 

[rojiee]

Well thats some what good news that it doesn't drop to crazy. I'd say just stress more about the light going off when you decide to take to the deal.
I filled mine to max and drove it a bit now at the half way point but it was 3 days. Definitely a leak somewhere.

 

[rojiee]

 

[amsr]

Mine dropped from full to 1/2 and then stayed there for a long time. It was definitely leaking though.

 

[pricej636]

I think I posted earlier in this thread, but 2017 GTI SE with just over 30k on it. Was losing fluid regularly and yesterday there was a small puddle of coolant under the car when I backed out of the garage. VW replaced both thermostat housing and water pump today after pressure test showed both were leaking.

 

[Judas]

water pumps and leaks in tubing fixed at around 30k
thermostat housing and more tubing leaks fixed around 59k

now i have a fault in the secondary waterpump, so needs to be replaced , which of course is leaking, and more tubing leaking coolant at 67k

 

[Leonardp]

1. Model year and model 2015 VW GTI
2. Mileage. 52,000
3. Have you tested your coolant system? YES
4. Have you had multiple failures and replacements of the housing? NO.
5. Took to dealer today as I just started noticing lower fluid level in tank. Dealer will replace housing and thermostat under warranty, no questions asked.

 

[theDoktor]

1. Model year and model 2015 VW GTI
2. Mileage. 52,000
3. Have you tested your coolant system? YES
4. Have you had multiple failures and replacements of the housing? NO.
5. Took to dealer today as I just started noticing lower fluid level in tank. Dealer will replace housing and thermostat under warranty, no questions asked.

AFTER your repairs are done, please file a report/complaint with NHSTA. We need to build a big enough case file with them so the repairs hopefully will become a recall item and finally VW will put enough engineering & production resources into this issue that it finally gets fixed. See the first page/item on this issue.

 

[elamothe15]

1. Model year and model: 2015 VW GTI S
2. Mileage: 65,000 miles
3. Have you tested your coolant system? Yes, on multiple occasions
4. Have you had multiple failures and replacements of the housing? No
5. Took it to the dealer 3 times over the last ~5,000 miles.
   1. Low coolant light - first time no leak was found and they simply topped it off.
   2. Drop in coolant (no light) - They found corrosion at the coolant sensor and said there was a "coolant migration" issue that has been observed and it is out for recall on Tiguans. Replaced coolant expansion tank and sensor wires under warranty, no questions asked.
   3. I actually brought it in for a small EVAP leak code and during visual inspection they found a coolant leak, pressure tested and failed. They replaced the pump and thermostat housing under warranty, no questions asked. EVAP canister and purge valve also all replaced under warranty, no questions asked)

Basically since I had documented coolant loss just as my power train warranty came to a close they honored everything 5k miles later.

 

[Leonardp]

AFTER your repairs are done, please file a report/complaint with NHSTA. We need to build a big enough case file with them so the repairs hopefully will become a recall item and finally VW will put enough engineering & production resources into this issue that it finally gets fixed. See the first page/item on this issue.

Ok will do

 

[jimlloyd40]

AFTER your repairs are done, please file a report/complaint with NHSTA. We need to build a big enough case file with them so the repairs hopefully will become a recall item and finally VW will put enough engineering & production resources into this issue that it finally gets fixed. See the first page/item on this issue.

Worth a try but I don't think anything will cause VW to fix it. Thousands of warranty repairs haven't caused them fix it.

 

[geokilla]

I think I'm affected. I topped it off twice now since I owned the car. Last December, I took it to Pfaff VW and 5 months + 7,000km later, my coolant is barely above the low mark.

 

[MonkeyMD]

Just had mine replaced at 97k miles. In that time had to refill coolant 3 times at 81k, 85k and 89k. Hopefully get another 100k out of it.

 

[ReadTheBook]

Has anyone found a company anywhere in the world making aluminum housings yet?

 

[MonkeyMD]

Has anyone found a company anywhere in the world making aluminum housings yet?

For the MK6

https://www.uspmotorsports.com/06H-121-026-DD-USP-Cast-Aluminium-Water-Pump.html

They have this one for the MK7, but really just the same plastic housing with metal impeller

https://www.uspmotorsports.com/Ulti...w-Metal-Impeller-For-Gen-3-MK7-06L121111.html

So I guess the answer is no