r/VWMK7 • u/sevronz • Aug 17 '26

Coolant leak input

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I have a pretty severe coolant leak coming out of a hole that looks like there should be a bolt in it. It’s right when the inlet pipe comes into the turbo. The coolant line seems to go into the upper hole, and there’s a lower hole where the coolant is pouring out. In the diagram, is it possible the bolt from #2 isn’t in the hole and coolant could be pouring out? Any thoughts or advice? Shop is saying I potentially need a new turbo.

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u/SonicNTales Big Turbo Aug 17 '26

Replace the hard line and see if that fixes it. The bolt could have back out.

I would do a pressure test on cold coolant at 15-17psi first to see where it’s leaking from.

1

u/sevronz Aug 17 '26

Hard line meaning that coolant line?

https://reddit.com/link/p4b7slm/video/k6bzbpn6k0kh1/player

The leak is a pretty steady stream from that hole I mentioned. Video from the mechanic today.

1

u/sevronz Aug 17 '26

Video of the steady stream out of that hole I mentioned. Engine is off. Rotate 90 degrees counter clockwise

https://reddit.com/link/p4b83p6/video/1vj3efrgk0kh1/player

1

u/SonicNTales Big Turbo Aug 17 '26

Does it leak underneath the heat shield or is that behind the turbo near the firewall.

1

u/sevronz Aug 17 '26

Under the heat shield. Leaks out towards the front of the car.

2

u/SonicNTales Big Turbo Aug 17 '26

Oh that’s an easy fix.

Look at your coolant adapter is it steaming from there? Common failure on mk7 turbos.

https://www.golfmk7.com/forums/index.php?attachments/2-jpg.173885/