Have an Astra Van 2001 TDI, it has been leaking coolant for a while. Have taken it to garages all have a view but none resolve it. Last one changed RAD a costly exercise, still leaks, leaves a pool on the floor when left on drive. Have tried to explain to the mechs that if filled, the expansion bottle, and left for a period there will be no leak, after you have run the van to temp and then left, perhaps even after utilising the heater, it will leak. None of them seems to check it in this mode which has always astounded me, even when they pressure test it would appear they do this when cold, is this correct. Can anyone provide me with, or point me to, a diagram of the full cooling system with parts location and items shown.
Any help would be greatly appreciated.