Coolant Reservoir Leak

[Shoehat]

Somehow the coolant reservoir developed a tiny pinhole leak, that orange circle in the picture

Has this happened to anyone?

Guess I'm replacing the reservoir. Haven't found a DIY yet but how hard could it be? Any advice?

fwiw, according to Dashcommand coolant temps were 205 - 210 while driving around today in 90 degree weather.

 

[Shoehat]

I am the king of unpopular posts.
Got a sweet new amazon reservoir, install was easy, all is good.

 

[GOODS]

Nice!

 

[Cryptic19111]

man, for a 2010, that's a shitty looking reservoir.. the plastic will yellow and get brittle / crack over time, but I wouldn't expect it in that short a time

 

[Shoehat]

man, for a 2010, that's a shitty looking reservoir.. the plastic will yellow and get brittle / crack over time, but I wouldn't expect it in that short a time

Agreed.

 

[jay745]

really odd, i've never seen that happen before.

 

[Shoehat]

really odd, i've never seen that happen before.

My theory;

I've driven up the steepest street in Los Angeles at least four times a week (Loma Vista) for the past five years. When I get to the top and park I noticed (just recently) the coolant flowing back into the reservoir and splashing the container right where the tiny hole happens to be.

Coincidence?

I think not.

What's your opinion?

I'd like to know.

 

[jay745]

well your theory certainly makes sense. Especially if you are parking on a heavy incline because that definitely looks like it got too hot on the top. Not really sure, maybe the plastic is made differently from bottom to top with different heat ratings.

 

[XGC75]

man, for a 2010, that's a shitty looking reservoir.. the plastic will yellow and get brittle / crack over time, but I wouldn't expect it in that short a time

This. I have a '12 with 85k miles but the reservoir doesn't look nearly this bad. Something else is wrong.

My theory;

I've driven up the steepest street in Los Angeles at least four times a week (Loma Vista) for the past five years. When I get to the top and park I noticed (just recently) the coolant flowing back into the reservoir and splashing the container right where the tiny hole happens to be.

Coincidence?

I think not.

What's your opinion?

I'd like to know.

The return line feeds into a bucket which overflows back into the reservoir so as not to cause bubbles and frothing. Recirculation is tamed by design. If you're getting coolant flowing back from the coolant circuit where the coolant is supposed to be drawn in from the reservoir, the coolant would look as though it were splashing up against the side up to that spot.

I bet you have a coolant circuit issue. I bet that your hot coolant isn't flowing into the radiator but back into the reservoir, ageing the plastic and causing that degredation.

 

[xHeartcoreboyx]

To the guys complaining about how it looks, the 2010s reservoir is a bit more yellow out of the dealer.


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[KunsTwerk]

Strange...similar crack on mine. Noticed it after taking it to the dealer for a oil change. Disregard the overfilled engine coolant reservoir. Don't know why they do it. Time to drain some out...

 

[Kwelitysoul]

I am the king of unpopular posts.
Got a sweet new amazon reservoir, install was easy, all is good.

I'm having the same issue, which reservoir did you get off Amazon?

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[ferrariF601]

Strange...similar crack on mine. Noticed it after taking it to the dealer for a oil change. Disregard the overfilled engine coolant reservoir. Don't know why they do it. Time to drain some out...

i just noticed some coolant on my garage floor also.....was worried it was the water pump on my 2010 GTI with original water pump and 40K miles on it

but after thorough investigation i noticed some dried out coolant on the coolant reservoir....

where can i get a CHEAP replacement??

thx

 

[Jemin_G]

i just noticed some coolant on my garage floor also.....was worried it was the water pump on my 2010 GTI with original water pump and 40K miles on it

but after thorough investigation i noticed some dried out coolant on the coolant reservoir....

where can i get a CHEAP replacement??

thx

I had a similar issue last summer. After a new cap and hose failed to fix the leak, I bought a new tank from RockAuto. Problem solved. Check out rockauto.com if you need one.

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[Uberryan]

i just noticed some coolant on my garage floor also.....was worried it was the water pump on my 2010 GTI with original water pump and 40K miles on it

but after thorough investigation i noticed some dried out coolant on the coolant reservoir....

where can i get a CHEAP replacement??

thx

eBay