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Thermostat housing and water pump fail.

HalfGerman

Go Kart Newbie
Location
NH
Car(s)
2018 Golf R
The housing is plastic, the pump impeller is plastic. Nothing wrong with any of that, it's the seals that go.

Buy an electric car, no more stupid coolant problems!

Except some electric cars have cooling systems, for the battery.
 

NCM

Ready to race!
Location
Fort Wayne, IN, USA
Car(s)
2015 Golf R
So wifey's '16 GTi SE w/perf pkg (commuter car :D), that just logs slow, highway miles just clicked 70k - and dealer quoted the following: replace thermostat housing (just the housing, not pump) - $1710; mount two new tires - $599 (I just had 4 new Michelin SS mounted early 2019); replace brake pads - $1345 (front with rotors, rear just pads); recondition 4 wheels (some inner well dents) - $1,259. I get dealer costs will be higher but some of these are flat out outrageous - my recent annual service (just an oil change and basic check) on my 991.1 Turbo S was $1100 (exorbitant for just an oild change, but you do have to remove the rear bumper cover, which is a PITA, as I've done it)

The kicker, nearly $1300 to 'recondition' the wheels? the Austins brand new are $194 a piece... and over $1300 to replace two rotors and 4 pads? Interesting indeed. I'll pick up the USP water pump kit and get back into doing some work myself. lol (btw, the USP deal is pretty good, as they allow for a turn-in of the old pump, with a shipping label, and they'll give you $40)

Anyone with some insight to the replacement work?

That's, um, astounding.

Water pump/t'stat assembly parts are about $300 online, let's say $500 through dealer channel. There is some labor involved, since the intake manifold usually comes off for that job, but not that many hours.

Mount and balance tires, what, $40 each at any tire store? Wheel refinishing runs about $100 each at my local specialist.

You may need to point out to your dealer that the GTI doesn't come with the solid gold brake rotor option...

Neil
 

Kyle1116

Ready to race!
Location
Miami
Has anyone ever had their water pumps replaced under warranty with a tune? I had my car tuned for 2k miles roughly and decided to return the car back to stock. Starting to think my water pump is leaking at 52k miles
 

GTIfan99

Autocross Champion
Location
FL
Has anyone ever had their water pumps replaced under warranty with a tune? I had my car tuned for 2k miles roughly and decided to return the car back to stock. Starting to think my water pump is leaking at 52k miles

Yes, that's pretty common from what I've read. VW generally replaces them., even on tuned cars.
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
Has anyone ever had their water pumps replaced under warranty with a tune? I had my car tuned for 2k miles roughly and decided to return the car back to stock. Starting to think my water pump is leaking at 52k miles

I had mine replaced under warranty and mine's tuned. But I am lucky to have a tune friendly dealer. By the way it's the thermostat housing that's probably leaking.
 
Ok so I’m trying to see if there is any difference between new thermostat housing vs old thermostat housing

06L 121 111M (new) vs 06L 121 111H (old)

The only thing I noticed is that the left hole is blocked off?

Other than that, I can’t see any other differences / improvement.

I really hope it never leaks again...because damn it’s a sh!tty job! Took me whole day

See picture
 

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dr_mat

Go Kart Champion
Location
Berkshire
Except some electric cars have cooling systems, for the battery.
All electric cars now have temperature control of the batteries (heating and cooling). The difference is there's so far almost no reports of stupid coolant problems with it, and there's plenty of ten year old electric cars out there. VW thermostat housings can't even make it to five years by comparison. Presumably due to cost cutting?
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
All electric cars now have temperature control of the batteries (heating and cooling). The difference is there's so far almost no reports of stupid coolant problems with it, and there's plenty of ten year old electric cars out there. VW thermostat housings can't even make it to five years by comparison. Presumably due to cost cutting?

Good point. Everyone I know that has a Golf or GTI has needed the thermostat housing replaced within two years.
 

mopar22

Autocross Newbie
Location
Michigan
Car(s)
16 GTI
Ok so I’m trying to see if there is any difference between new thermostat housing vs old thermostat housing

06L 121 111M (new) vs 06L 121 111H (old)

The only thing I noticed is that the left hole is blocked off?

Other than that, I can’t see any other differences / improvement.

I really hope it never leaks again...because damn it’s a sh!tty job! Took me whole day

See picture
Most leak at a seam that is plastic welded from the factory not the mating surface (although there are some that do)
 

amsr

Ready to race!
Location
Michigan
Does the replacement use a revised part to solve the problem? Or will it fail again in the same way soon after?

Does this effect all MQB vehicles? Or just the GTI?
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
Does the replacement use a revised part to solve the problem? Or will it fail again in the same way soon after?

Does this effect all MQB vehicles? Or just the GTI?

All MQB. Mine was replaced on my 18 at 20,000 miles and I'm now at 74,000 miles and it's fine. Friends of mine with the TSI had theirs replaced also.
 

dr_mat

Go Kart Champion
Location
Berkshire
Our 1.4 tsi was probably leaking for nearly a year before I got it done, but it made nearly five years..
 

amsr

Ready to race!
Location
Michigan
Does the replacement use a revised part to solve the problem? Or will it fail again in the same way soon after?

Does this effect all MQB vehicles? Or just the GTI?

Are there other common coolant leaks on this car? The replaced mine in July 19, but I still smell coolant from time to time. Meh.
 

GTIJH

New member
Location
Nashville
Car(s)
2017 GTI Autobahn
The water pump on my '17 started leaking at about 49,500 miles. Replaced under CPO warranty.

My old '12 GTI had the water pump go out about 51,000 miles and the leak made the G 28 Engine Speed Sensor fail (car went into limp mode). This was just outside of warranty, but VW covered the repair and a new sensor!
 
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