m5 f10 turbo coolant line bubbling

[neeks007]

hi, i've been searching forums for a couple weeks now but i can't seem to find any conversations about a problem i'm trying to solve. if i drive and get the car up to temp and then get back home and turn it off u could hear a bubbling/gargling sound coming from the turbo coolant lines and you could even see them shake a little bit. has anyone came across this issue before or is it nothing to worry about ? coolant is filled to max and car does not over heat or anything like that.

[M5Rick]

Sounds like a part blockage somewhere, topping it with distilled water and a/freeze mix to the bottom marker only?

[neeks007]

what do you mean ? i understand the blockage but what should i try ?

[M5Rick]

The level of the coolant in the coolant expansion tank, you got it at the max level which is at nearly the bottom of it on the marker and not right at the top near the filler, not being funny or anything but filling it right to the top would be bad.

[neeks007]

lmao oh i gotcha yeah it's at the bottom of the tube it's not close to the top !

[M5Rick]

It then sounds to me like an air leak in it, run the engine and while hot, park up and switch off, then with the turbo coolant pump running unscrew the turbo coolant expansion cap slowly so that it sort of bleeds itself. It'll be tight to undo and maybe not remove it completely but just to let it hiss itself out or you could get scalded, so that's what I would try and wear anti-scald glove/protection just in case.
The engine cooling and turbo cooling are two seperate systems, I see you've been on redit for a solution but that's all I can suggest for now.

[neeks007]

okay sweet sounds good and just to be clear that's the cap on the passenger side cause the other side is for the engine coolant right? and also how do you ever know if the engine coolant the one on the driver side is ever low cause there's no min/max is there like a secret to that or just when u don't see coolant anymore it's low lol ?

[M5Rick]

Yes on mine it would be on the drivers side as cars are RHD.

For main engine coolant, which is the other container on the right side looking from the front of car next to the power steering reservoir, just top up until you can see it flopping about at the bottom of the tube there.

[neeks007]

sounds good thank you ! I appreciate the responds !

[M5Rick]

GL there in the Windy City !