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Failed Thermostat Housing/Coolant Loss Info Gathering

relive

Ready to race!
Location
USA
View attachment 206680

here is the mark I’m questioning. It’s hard to tell in the photo, but it COULD be coolant. It’s a typical spot for it to run down. Mine was similar. Mine was pooled up on the oil pan rail. It can never hurt to have someone look at it. Dealers seem really resistance to fixing what is a widespread problem.

Yeah, I figured that this was the spot that was concerning. What is the cheapest way to get a second opinion on this? I assume that the dealership would give me the same answer if I reached out to them again.

My warranty expired a few days after my service, but my complaint is logged in the work order, so it should still be covered under warranty if it is indeed leaking.
 

gixxerfool

Go Kart Champion
Location
New Jersey
Car(s)
2016 Golf R
No, the work is being done at the dealer. You take the car to any repair shop and the shop sends the claim in. You can get a $50 discount on your deductible if you take it to an "approved" shop, but i'd rather just let an actual VW tech do it.
Agreed. At least they know how to do them.
 

gixxerfool

Go Kart Champion
Location
New Jersey
Car(s)
2016 Golf R
Yeah, I figured that this was the spot that was concerning. What is the cheapest way to get a second opinion on this? I assume that the dealership would give me the same answer if I reached out to them again.

My warranty expired a few days after my service, but my complaint is logged in the work order, so it should still be covered under warranty if it is indeed leaking.
If it were me, try another dealer, if possible. If not, a strong independent may take a peak for 1/2 labor or so. If you can get them to put it in writing I would return to the dealer. If the dealer pushes back I would be cordial to them but would contact VWoA to get the concern covered.
 

surfstar

Ready to race!
Location
Cali
Well I'm a moron and had it in my head that it was 6 year 60k miles so I'm out of warranty. Dealership quotes me 4 hours at $1100, guess there's no real reason to have them do it and I should shop around. I have another garage I go to that offers a 2 year warranty on their work so I'll see what they say, unless there's any reason I should have VW do the work?
Many have had it covered under the 5/60 powertrain warranty. Are you past 5 years?
Read this thread, and note how many were covered under 5/60 and INSIST that your dealership simply treat you the same way. You may have to escalate to VW, but be persistent. If one dealership is able to do it under warranty coverage, others should as well.
 

geokilla

Go Kart Newbie
Location
Toronto, Ontario, Canada
Car(s)
2018 VW GTI DSG
Got my coolant thermostat union replaced today after losing coolant over 10k km. Part numbers were 06L-121-139-A for the seal and 06L-121-131 for the union. Went 48k km with the original system and 4 or 5 top offs.
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
Got my coolant thermostat union replaced today after losing coolant over 10k km. Part numbers were 06L-121-139-A for the seal and 06L-121-131 for the union. Went 48k km with the original system and 4 or 5 top offs.
Done under warranty right?
 

geokilla

Go Kart Newbie
Location
Toronto, Ontario, Canada
Car(s)
2018 VW GTI DSG
Done under warranty right?
Yep though I'll probably get my IE stage 1 tune this weekend or next weekend. I want to make sure it really is no longer leaking before I flash. Don't want to give the dealer or VW any reason to deny a warranty claim if I got unlucky with the replacement union.
 

ReadTheBook

Autocross Newbie
Location
Bay Area Smoke Hell
Car(s)
2019 AT, 2018 S4
Yep though I'll probably get my IE stage 1 tune this weekend or next weekend. I want to make sure it really is no longer leaking before I flash. Don't want to give the dealer or VW any reason to deny a warranty claim if I got unlucky with the replacement union.
But... why didn’t they replace the housing? The thermostat housing itself will warp. That’s first hand from the service director at my dealership. They know they are terrible parts. He freely admits that. I fear you will have the same issue with simply the union and seal.
 

ReadTheBook

Autocross Newbie
Location
Bay Area Smoke Hell
Car(s)
2019 AT, 2018 S4
Got the car back. Looks like they only replaced the thermostat housing so let's hope that's it. Spilled a bunch of coolant around under the hood too. View attachment 206681
I hope you demanded they properly clean up that fucking disgraceful mess. Unreal what these people will do.
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
But... why didn’t they replace the housing? The thermostat housing itself will warp. That’s first hand from the service director at my dealership. They know they are terrible parts. He freely admits that. I fear you will have the same issue with simply the union and seal.
I agree. It's usually the housing that leaks.
 

JacobAllison

Ready to race!
Location
San Diego, CA
But... why didn’t they replace the housing? The thermostat housing itself will warp. That’s first hand from the service director at my dealership. They know they are terrible parts. He freely admits that. I fear you will have the same issue with simply the union and seal.
We'll see! It's still got 10k miles of warranty soooo...
 

geokilla

Go Kart Newbie
Location
Toronto, Ontario, Canada
Car(s)
2018 VW GTI DSG
We'll see! It's still got 10k miles of warranty soooo...
We actually have 5 year, 100k km powertrain warranty up here. So I have another 2.5 years and 52k km to go, assuming they don't say flashing a tune voids the warranty.
 
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