I got coolant level warning this morning, and needed to top up with 200-300ml.

 

Didn't see any obvious leaks but found this (see photo), that looks like traces of a very long term leak. I ran the engine for some time but it felt dry around this part/connection.

 

But what is the use of this connection ?   Is it coolant water inside at all ?  Anybody that have had the same issue ?

 

Edited 24 November, 20241 yr by Ingper

Hello Ingper, that looks to be a leak of Adblu fluid from the injection connection. 

Just now, Warrior193 said:

Hello Ingper, that looks to be a leak of Adblu fluid from the injection connection. 

Thanks. You're right - that is typical "Adblue crystal"..... 😉.

But then the coolant leak will be even more mysterious. Maybe I need to wait and see if I need to top up again soon, I think.....

From what I have seen reported for TDIs, the EGR is a possibility for coolant loss.

2 hours ago, Warrior193 said:

From what I have seen reported for TDIs, the EGR is a possibility for coolant loss.

Yes, I have found a lot of such EGR issues (Google).

But almost everything seems to be a little bit "older" cars, mine is a MY 2019 (2.0TDI, Bluemotion, dual cat). Is the weak EGR design still an issue on MY 2019 and on ?

Edited 24 November, 20241 yr by Ingper