2002 Audi A6

Engine Cooling problem
2002 Audi A6 4 cyl Front Wheel Drive Manual 130000 miles

When I start my car from cold the cooling fan makes this high humming noise for about 5-6minutes then the noise stops as well as the fan. What could be causing that?
Secondly, I hear this clicking noise from the left side of the engine every time I turn left or when I try to accelerate in second or third gears. Can you tell me what is causing that?
July 4, 2010.

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