I started having coolant leak after changing the coolant.
Today i found a spot in front of the engine.

Click image to enlarge

Click image to enlarge

Click image to enlarge

Hi Umitbat,
Have a look at the pipe that runs to the EGR cooler. I had a coolant leak, long before my Changeover valve problem and my indy mechanic traced the leak down to that pipe. He said it had perished so badly that it had 'turned to mush'. Replaced the pipe and no more coolant leaks.
BTW, got the new changeover valve fitted and the FFRR is now toasty warm. Did a wedding run for a friend of mine last week and she loved the RR experience, especially as I had my best suit on and a chauffeur's cap. It made her day!

Lovely photo!!!
Thanks for info.
Is it hard to access??
My changeover valve is working just after some sanding and cleaning too.
Best wishes!! 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

This guy is leaking then?
Hope it is the hoses.

Click image to enlarge

Think the egr cooler should be okay, but check the hoses to and from it. It's a bit of a sod to get at on a 4.4 TDV8, but not sure of its location on the 3.6 engine.