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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +)

VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +) Discussions area for the Mk7 (2015+) Golf and Golf Wagon TDIs based on the MQB (Modularer Querbaukasten) platform.

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Old October 26th, 2019, 13:23   #196
Gottfried
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Join Date: Nov 2018
Location: Slovenia
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Got my matrix replaced also. I drove too few km's to give any conclusion yet..
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Old October 29th, 2019, 06:06   #197
Kennyboy993
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Join Date: Oct 2019
Location: Leeds
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Better news my end - 4 long trips in and no loss of coolant at all. Approx 800 miles.

Looks like this forum has saved me a huge amount of money and who knows how much grief....... thanks guys


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Old November 13th, 2019, 07:22   #198
minu94
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Join Date: Nov 2019
Location: Bucharest, Romania
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Quote:
Originally Posted by mm-rocco View Post
After 5000km i have coolant-issues again. This time the coolant is not blown out after a DPF. The coolantlevel drops under minimum and the an alert is generated on the MFA. As soon as i loose the cap pressure is released and the coolantlevel rises again. I am thinking of the EGR-cooler now.....
I am still confident that the heater matrix was related to my problem, being the first part
https://youtu.be/Mi3BnMo_F7g
https://youtu.be/j9cVRIpoMP0
https://youtu.be/KYPoK3WRado
Any news? Did you manage to get it sorted out?
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Old November 13th, 2019, 08:50   #199
mm-rocco
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TDI(s): MK7 GTD 2016
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Quote:
Originally Posted by minu94 View Post
Any news? Did you manage to get it sorted out?

Thanks for asking ! On friday my EGR Cooler will be replaced, this weekend i will do some testdriving and let you all know what happened. If this is not the solution i am lost ??!?!? The good news is that all the repairs have been been payed by de German dealer under extended waranty.
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Old November 18th, 2019, 12:03   #200
kisvamos
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Join Date: Nov 2019
Location: Hungary
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Hello Guys,
This forum thread helped me a lot, because in case of my MK7 Variant (2014) CRBC engine the car made the same symptoms like it was mentioned before. Normally, the problem occurred during longer trips, when the DPF regeneration phase happened. It was clearly audible that the coolant boiling and head out towards the front right tyre (because there is and overflow pipe). Beside it, the car was unable to make hot air when I set to HI the climate. After changing the Expansion tank and the cap on it the problem occurred again, so I tried to look after maybe someone else has the same problem. Luckily you guys identified as a construction problem of MQB platform VW systems, means that the Heater matrix inside the cockpit is undersized, and prone to clogging. Of course the dealers told that it is sure that there is head gasked, water pump or thermostat error, but i believed you guys instead of them. So I have booked my car to a coolant specialist where they are changing heater matrix as a daily routine. After disassembling they stated that the original was totally clogged, means that the fluid from the EGR cooler was unable to flow through it, because of it, the overflow pipe activated and the boiling coolant generated overpressure inside the tank so, this caused the problem.
So, fingers crossed, waiting for the next DPF regenations and see how the things are working. The price of the changes with Nissens heater matrix was ~230Euro.
I will update you guys if I have any news.

Last edited by kisvamos; November 18th, 2019 at 12:05.
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Old November 21st, 2019, 16:03   #201
mm-rocco
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TDI(s): MK7 GTD 2016
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Not very lucky here. After the replacement of the EGR Cooler i still had a pressure build up resulting in a blow out of coulant. My VW Dealer gave me 2 quotes: Head gasket and pressure test and head + head gasket + pressuretest. 2300 Euro and 4400 Euro. I claimed the coolant-problem within 6 months of buying the car so i have a claim now on the dealer who sold me the car.

Last edited by mm-rocco; November 21st, 2019 at 16:11.
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Old November 23rd, 2019, 19:23   #202
BirdmanofTas
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Join Date: Aug 2019
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Quote:
Originally Posted by mm-rocco View Post
Not very lucky here. After the replacement of the EGR Cooler i still had a pressure build up resulting in a blow out of coulant. My VW Dealer gave me 2 quotes: Head gasket and pressure test and head + head gasket + pressuretest. 2300 Euro and 4400 Euro. I claimed the coolant-problem within 6 months of buying the car so i have a claim now on the dealer who sold me the car.
Sorry to hear of the ongoing issue mm-rocco, have they checked the electric coolant pumps on the engine, one of them is in the coolant circuit for the heater etc, and one in the egr cooler coolant circuit.. they have a habit of the impeller spinning on the shaft of the motor, so reduced coolant flow..
best of luck with it.. i can say my golf highline has been perfect since the replacement of the matrix approx 6500K,s ago, so feeling lucky
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Old November 24th, 2019, 09:57   #203
Gottfried
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Ji guys. Thanks a lot for all helpful posts. Mine seems to be fixed by changing the heater matrix. My friend showed the difference by blowing in old and new part and the old one is substantially narrower apparently.

fingers crossed for rocco and kisvamos.
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Old November 25th, 2019, 07:09   #204
c@n
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I have the same problem with my 2015 Seat Leon 1.6 tdi CLHA engine.

We changed pretty much everything but still no luck. Heater matrix included, but it is the OEM matrix, might help to replace it with Nissens.

I have no EGR and DPF installed. They all been deleted due to the mods I had.

Will update if I get any solution.
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Old November 30th, 2019, 04:38   #205
kisvamos
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I have a good News in my case. I am after 7-800 kms with two dpf regen cycles without any loss of coolant. I still believe that this was the problem in my case and maybe I was lucky because I did not used the car after the second occasion when the previous problem occurred. Maybe this saved the head gasket and the egr cooler as well.
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