2010 135i Water Leak

[Soldi3r]

Hey guys,

I have a 2010 135i N55 - And it's using quite a bit of water, I did a pressure test twice and no sign of drop in pressure during test. However it runs empty over night, and I have water laying under the right front tyre.

It has 100k on the clock.

Any idea ?

 

[akash]

Possible radiator leak

 

[husaindindar]

Was the pressure test done on a hot/warm radiator?
It could be possible that the crack or hole opens up at night when things cool down.

Just a thought. I could be wrong.

 

[Maljan]

If you do the pressure test on a cold rad, the leak might reveal itself. Good luck!

Blerrie plastic cooling systems! Why do they keep fitting them?