A4 loosing Coolant
 

My son has a 1997 A4 1.8T with about 135k on the ODO. The heat was not working so we flushed the system with clean water by removing the heater hoses and running water through the system until it ran clear. We also flushed the heater core the same way. Since then the heater has been great but we started loosing coolant from the 2 fittings on the turbo. Are there Orings on these fittings that can be repalced? If not what ideas do you have?
Thanks

If I recall correctly, there is a crush gasket on each fitting. They are most-likely best sourced from the dealer.