The head gasket may leak oil externally. The oil will be visible around the cylinder head and block area.Google+
Car Problem Reports
Saab 9-3 Head Gasket Leakage
Saab 9-3 Problem
Engines Affected: 2.0L 4 Cylinder Turbo, 2.3L 4 Cylinder Turbo
Average Mileage: 125,000 mi (61,000 mi - 180,000 mi)
not fixed yet.
Visitor, 1999 Saab 9-3, 2.0L 4 Cylinder Turbo, 180,000 mi
oil leak into coolant, thankfully not coolant into oil. Oil leaks from cylinder head. White coating on spark plugs and o2 sensor. replaced gasket timing chain, re machined head, etc..
Visitor, 2003 Saab 9-3, 137,000 mi
exterior leak passenger side rear head gasket