I'm doing a timing belt change and discovered a small amount (10 cc) of oil in the air pipe between the turbo (passanger side) and the intercooler (drivers side). Is this normal? The 2003 A4 Quatro 1.8T has 110,000 miles, everything is original OEM, and runs excellent. If this is a sign of a problem then I'd like to know what to fix or watch out for.

Thanks