It appears I may have the same problem as Peter Seow had last year....
It appears I may have the same problem as Peter Seow had last year. http://www.ferrarichat.com/forum/threads/secuderia-rampante-coolant-hose-leaking.533981/#post-144963417 I had all the coolant hoses under the plenum replaced with Scuderia Rampante hoses last February. Now I have a very slight leak coming from the valley. It's been nine months since the hoses were replaced just like in Peter's case. I've pressure tested and the system holds pressure but just moving in and out of the garage leaves about a tablespoon or so of coolant on the garage floor. I'll be taking it to Ben at Salerno Motorsports in a couple of weeks since pulling the intake manifold is beyond my capability at my age. I'll know more after Ben pulls the plenum and reports.
Check if the leak is occurring at the thermostat: if that's so then the two gaskets (#7 and #15 in this diagram https://www.ricambiamerica.com/car-diagrams/ferrari/v12/gt-group-2-2/456gt/water-pump.html) that seal the thermostat unit have degraded and are beginning to disintegrate due to age. It happened to my 456: the leak was almost undetectable but was definitely there.
