Hi Guys. I have been trying to solve this problem for over a year now! Symptoms are a loss of about 2 pints of coolant after a long drive. I know when it has happened as the driver side heater blows cold even when engine is hot. Car gets hot in traffic and coolant seems to exit via the expansion tank over-flow. My theorys include: 1. Blown head gasket. They where both replaced 18 months ago, but have not had the head bolts retorqued, is this needed? Job was done by my brother-in-law and I and both heads were skimmed and crack tested. 2. Leak from a pipe or join in cooling circuit. I found a leak from a heater valve pipe recently while I was pressurising the system with a pump, cold. At 13lb there was no leak into the cylinders. This changed one of the symptoms which was the expansion tank now empted as it should as the engine cooled down after shutdown. 3. Air in system. I think these cars are fairly easy to bleed. I have even lifted the front of the car and think I am achieving a good bleed. Has anyone had a similar problem with this type of Ferrari, I would be interested in any ideas anyone has.