Problem Slow leak cooling system (radiator - water pump - expansion tank)
Starting out - the coolant in the expansion tank is full After highway driving the coolant in the expansion tank (up top) is down half way When I take the expansion tank cap off the expansion tank the coolant level returns to the full mark on the expansion tank.
Eventually, after a couple of days the coolant level falls low enough to trigger the dash-board light
I have not yet identified a point where the leak is.
Question Does anyone know what is happening/the problem in the cooling system or where the leak might-be ?
Model: 1989 Jetta Carat 1.8 Liters (engine displacement liters (1780 cc)
Vehicle Model # RB1G Vehicle Type 4S Engine Type SOHC Engine code PF Engine Series (ID/VIN) 105 hp@ 5400 rpm with A/C Fuel system Digifant II Digital Electronic Fuel Injection Manufacture Date 11/88 Model Year 1989 Transmission Automatic 3 speed / air conditioning Volkswagen AG West Germany Wolfsburg Car number 266,124 Manufacturer make Europe passenger Car Body Style 4 door Sedan (upgrade)