hey guys
after installing the water system (many thanks to all off you that helped),
i drove the car for 15 min's and then the rpm guege start coming up and down and there the car just shuts down.
any idea what could be the problem ?

 

Sounds like an electrical issue, low battery, bad connector, possible bad regulator. Mines done that when its busted the alternator belt and I was running off a low battery.

 

Guessing its a V12??????

CTS (Coolant Temp Sensor) flaky, or its wiring has gone AWOL, very common.
Air in the cooling system, so above sensor is NOT immersed in coolant, it cannot read air or steam.

The list goes on.

Maybe my sticky at the top might track it down.