I agree he should try that. For me the slightest coolant leak smell jumps out. Perhaps it's the higher temp the 4.4 runs at and maybe the td6 runs cool enough to miss it.

Mine had a hairline crack in the expansion tank; took me a while to spot it as the leaking coolant evaporated from the tank surface.

If that exhaust is blowing then you will get discolouration like that from the combustion gases mixing with water from the road etc...

Also a leak like that would show up with a pressure test of the system.... Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

It is a starting point to check. Nothing looks wet and traceable. Try running the car around for 20 min or so. Shut off and see if any coolant is there. Check every 10 min as it cools.

Hi.

Well, finally, i have a diagnosis of that coolant leak. Unfortunately, the cylinder head is cracked.

To tell you the truth, I'm a bit dissapointed with BMW engines. I thought they were more reliable. Maybe former owner overheated the engine or, as I have been said, the cylinder head might have been cracked after a neglected repair of the turbo.

In a fex days i will have Rangie back, so we will see how it is working.

Anyway, thanks everybody.
Pepa80

Oh so sad.