Failed Thermostat Housing/Coolant Loss Info Gathering

[Ecapskcab]

A slow leak is a problem waiting to happen.

I've unknowingly had this problem for quite sometime. Thought it was "normal" to top up. No disaster, yet. Are there any all aluminium options available for the housing and pump assembly? I'm at 67k miles and out of warranty so this will be self funded.

 

[Subliminal]

At what point should you bring it to the dealer? As soon as you first notice it leaking coolant?

 

[Diggs24]

At what point should you bring it to the dealer? As soon as you first notice it leaking coolant?

Yes, you don't want to be stranded and need a tow.

 

[Subliminal]

Oh damn so it can blow at any time? I thought it took more of a buildup

 

[Diggs24]

It can easily go from a drip to a pour. Not saying it will but it can.

 

[volks6]

It can easily go from a drip to a pour. Not saying it will but it can.

Yup seen it with my previous MK6 and now my MK7. Perfect one day or a drip one day and a gusher the next.

 

[jecks]

completed mine at 25k

COOLANT: G-A13-774-1G-DSP
WATER PUMP: 06K-121-011-C
THERMOSTAT: 06L-121-111-M
UNION: 06L-121-131

 

[GTIfan99]

Is there an aftermarket upgrade for this yet or are we stuck with factory parts?

 

[Ecapskcab]

Is there an aftermarket upgrade for this yet or are we stuck with factory parts?

I haven't seen anything. Maybe someone else can chime in. I ended up purchasing through FCPEuro, for the warranty aspect.

 

[Leonardp]

I recently had my housing and thermostat replaced free of charge by the dealer and the coolant level in the tank is already well below the max fill line

 

[mopar22]

I recently had my housing and thermostat replaced free of charge by the dealer and the coolant level in the tank is already well below the max fill line

One of two things, they didn't bleed it or they installed the parts wrong

 

[jimlloyd40]

Is there an aftermarket upgrade for this yet or are we stuck with factory parts?

Someone does make an aluminum housing but I'm sorry I can't remember the name of the company. I saw it in the forum not too long ago but a search didn't help.

 

[mopar22]

Someone does make an aluminum housing but I'm sorry I can't remember the name of the company. I saw it in the forum not too long ago but a search didn't help.

its only made to fit the mk5/6. mk7 doesn't have it

 

[jimlloyd40]

its only made to fit the mk5/6. mk7 doesn't have it

That's too bad. They would probably sell lots of them.

 

[NeedSleep]

For my own online documentation lol. This happened a couple weeks ago. Car is 4 years old now, and this happened at 32,753 miles.

No signs of coolant issues. Suddenly got stranded at Costco when I saw steam when parking and later coolant on the ground. Diagnostic shows "defective pump and thermostat housing." Replaced under warranty.

Just filled out that NHTSA form.