help with a coolant leak

[Zenun]

Hi there...

I have a Audi s4 3.0tfsi b8 2010.

Not long ago bought the car and it is leaking coolant internally. Water is definitely in the crankcase (not moisture). We have replaced to oil cooler, pressure tested the supercharger and still same symptoms of losing a noticeable amount of coolant after 30min drive, nothing external. Also we replaced the thermostat. This is looking like hg or cracked head but no white smoke and never has misfire and runs like a dream always and never overheated.

As these engines are very complex, is there any other way water can enter the crankcase other then what we’ve tried & hg?

Thanks for any help

 

[Ginge247]

PCV unit common on these to use oil and coolant

 

[Zenun]

thanks.
How would coolant get into the PCV ?
are there any ways of coolant getting into the oil other then supercharger, oil cooler or head gasket/head.
it's driving me mad.

 

[Ginge247]

Have a look at this m8 save me explaining it haha.
http://www.audizine.com/forum/showthread.php/778180-If-you-have-invisible-coolant-loss

 

[Zenun]

thanks for the link sounds just like what I have. already have the supercharger off so I get a new pcv.

Thanks for your help