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Model specific boards => Golf mk7 => Golf mk7 GTD/TDI => Topic started by: CamGTD on 23 August 2018, 11:11

Title: Coolant mystery golf GTD mk7
Post by: CamGTD on 23 August 2018, 11:11
Hey there,

Having a very strange problem with my GTD and have now been turned away from 3 garages.

When i drive normal day to day, the car is absolutely fine. However, when i go on a long journey (2 hours +) and every now and again put my foot down for a little fun as soon as i turn the engine off the coolant tank empties itself.

I've had replaced: Cam belt, water pump ran cam belt, Rear engine water pump, the small water pump that pumps the water back up to the header tank, and i've had the header tank replaced. I've also had it tested for head gasket and also pressurised test to find any obvious leaks.

The strange thing about the problem is that the coolant tank will only empty once i've turned the engine off. I've done 1 hour drives and had it happen and 2,3,4 hour drives and had it happen all at the end. the coolant tank will be fine and not empty during the drive.


If anyone has experienced a similar problem and got a solution help would be amazing.
Title: Re: Coolant mystery golf GTD mk7
Post by: fredgroves on 23 August 2018, 15:50
When you turn the engine off the coolant tank empties?

Where does it go? It can't just vanish! You'd either get water or steam and lots of it surely?

If you left the engine running after a long drive and look at the tank, is it there? Then switch off, how soon does it empty?

Or are you just seeing it as a low coolant level warning on the dash next time you switch on?
Title: Re: Coolant mystery golf GTD mk7
Post by: fredgroves on 23 August 2018, 15:52
BTW a quick Google suggests a faulty radiator cap has these symptoms - no visible leaks but coolant vanishes...
Title: Re: Coolant mystery golf GTD mk7
Post by: dervdave on 23 August 2018, 16:14
Sorry to hear about the problem, my oldest daughter had exactly the same with her low mileage 1.9tdi Touran.
Changed, checked and flushed everything but never got to the bottom of it, finally reckoned it could only be the head even though a test said otherwise.
That sick she got rid of it before actually having it done.  :embarrassed:
Title: Re: Coolant mystery golf GTD mk7
Post by: Guzzle on 23 August 2018, 19:33
How old is the car and how long have you had the problem?

When you say turned away, presumably by independent garages? Why have they turned you away?

Also notice you've has lots of work done to tackle the problem, but haven't had a new radiator.

Is there any fluid under the car, or does the coolant appear to be evaporating?
Title: Re: Coolant mystery golf GTD mk7
Post by: CamGTD on 24 August 2018, 01:29
Hi there everyone, thank you for replying so quick!

the car is a mk7 2013 gold gtd with 40k miles.

I went out for a 3 hour drive today and about 1:30 in my car shot up the empty coolant message again, so I pulled over and took pictures of what you can see of the water, the header tank is brand new so it isn’t that so just a little confused what it could be and could try replacing next.

https://imgur.com/a/tx580RR
Title: Re: Coolant mystery golf GTD mk7
Post by: fredgroves on 24 August 2018, 08:48
So as you drive, the coolant escapes - it doesn't empty when you stop yes?

I'd definitely get a new rad cap immediately - its cheap and DIY....
Title: Re: Coolant mystery golf GTD mk7
Post by: CamGTD on 24 August 2018, 11:17
hi mate, i've added photos in one of my comments
Title: Re: Coolant mystery golf GTD mk7
Post by: DavyC on 25 August 2018, 10:40
By the looks of it you have head gasket failure!Read the thread on Golfmk7 forum about the guy asking the same questions as you.My GTD was the 1st known head gasket failure in the UK!Went through all the same parts as you have before taking the head off to find a blown gasket between cylinder 2 and its water jacket!
VW dealer and VAG specialists could not get to the cause of the fault.   
Title: Re: Coolant mystery golf GTD mk7
Post by: CamGTD on 25 August 2018, 11:51
hi there mate, Thanks for the info but i can't find the thread?! can you please link me?!
Title: Re: Coolant mystery golf GTD mk7
Post by: DavyC on 25 August 2018, 12:18
Coolant on outside of expansion tank by Jengli
Title: Re: Coolant mystery golf GTD mk7
Post by: SRGTD on 25 August 2018, 12:47
hi there mate, Thanks for the info but i can't find the thread?! can you please link me?!

https://www.golfmk7.com/forums/showthread.php?t=44848
Title: Re: Coolant mystery golf GTD mk7
Post by: Ldrowlands on 29 January 2019, 10:38
Hi CamGTD, I've been googling and it sounds like you've had exactly the same problem as me. I was wondering if you ever got it sorted? I've got a mk7 2.0 diesel GT model (not the GTD). Any help would be much appreciated!
Title: Re: Coolant mystery golf GTD mk7
Post by: Cjpenfold on 03 March 2019, 10:03
I have the exact same problem Vw had my car for 3 months in total and replace the egr cooler

But still losing coolant

2 independent garages have checked everything and recon it’s the gasket

Did either of you guys get it done???