[Smokedlights17]

Just got the car few weeks ago, replace multiple lines, water outlet, water pump, oil filter housing etc that seems fine now. When I got the car the smaller reservoir was straight water and seems I have to keep topping it off, seems its obviously going somewhere. I have a lift, and have had everything apart and I do not see any signs of leaking anywhere. That system is not even pressurized is it? Any common places to check maybe otherwise hard to see? I've heard something about rocks hitting something that could be part of the secondary system? If its not pressurized, not really a chance it could be cap then?

[F32Fleet]

Try reddit

[LA430]

I haven’t seen any common leaks with that circuit.
Only thing I would say is use a UV dye kit to see if you can find the leak. Leaking water will be difficult to spot.

When searching for issues I believe people call it the “low temp” circuit. Phrasing may help the search.

This could also be an internal leak in the intake manifold, but I have no way to verify that.

[Smokedlights17]

Originally Posted by F32Fleet

Try reddit

I havent been on forums in awhile, seems they are dead and/or no one works on their own stuff anymore like the good ol days

[Smokedlights17]

Originally Posted by LA430

I haven’t seen any common leaks with that circuit.
Only thing I would say is use a UV dye kit to see if you can find the leak. Leaking water will be difficult to spot.

When searching for issues I believe people call it the “low temp” circuit. Phrasing may help the search.

This could also be an internal leak in the intake manifold, but I have no way to verify that.

ya almost seems the only place it could leak is intercooler (way more common) from a peddle, or intake manifold. Not sure where it would go if in manifold I dont have any smoke or anything from tailpipe... Tried to pressure test it today and finding a correct adapter for that small tank is also next to impossible had to use a universal fitting that pops out even at 5psi. I think I will continue to look around intercooler from the back underneath etc as I have a 2017 they didnt come with rock guards installed yet

[F32Fleet]

Originally Posted by Smokedlights17

I havent been on forums in awhile, seems they are dead and/or no one works on their own stuff anymore like the good ol days

BMWTech subreddit

[quakerroatmeal]

Pressure test the coolant system to find the leak.