Car is loosing coolant. 2 qts in 80 miles with ac on half the time. temp climbs from 80 to 100C with ac on or when driving up hill. Water pump does not leak when pressurized. Also losing washer fluid down to top of heater coil. My mechanic thinks they are related and each will be cured by replacing the washer heater coil. I think they are on separate system. Mechanic has been working on these cars since 1957 and has been able to fix things that others in town could not. Very confident in him but puzzled and not wanting to trash a low mileage engine.