I am still experiencing a cooling system leak on my 1993 940 non-turbo with automatic trans. The hose clamps are tight and a new heater hose is installed. There is a sensor at the front of the transmission at the top which is right next to the pipe from the water pump. I noticed that the insulation on the cable for this sensor appears to have been somewhat melted away presumably from hot coolant spraying on it. Is there any coolant in the transmission by this sensor? I am thinking that perhaps the sensor may have been cracked or is just worn out and maybe coolant is actually coming out through this sensor thus burning the insulation away some in the process. Someone mentioned in another thread that this might be the crank position sensor if it is any help. This is a very baffling problem since the leak only appears to occur while driving the car resulting in coolant leaking all over the exhaust pipe creating a cloud of steam from under the hood. Pressure tests have not found any leaks that might be causing the problem.