Join Date: Mar 2007
Location: San Antonio, Texas
The advice to drive the car a bit is good. You've already got it together and you aren't going to hurt anything. I'd also recommend adding a small can of "Alumaseal" or something like it to your water. Alumaseal consists of very finely ground aluminum flakes. Suspended in water, it will cure a number of small seepage issues in Alfa motors. AlfaUSA used to recommend it.
If the problem still persists, you should do a pressure test at the radiator.
Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
'62, Lancia Flaminia Zagato3c, 2nd series