Porsche 1972 911 Workshop Manual page 64

C o o l i n g S y s t e m .
T E N S I O N I N G AIR PUMP BELT
A d j u s t i n g
Loosen bolt.
1.
2. Move air pump to left.
Tighten bolt.
3.
The belt tension is correct, if the belt can be
4.
pressed together about 1 5 mm (5/8 in.) at its
centerpoint with considerable thumb pressure.
Removing/ installing pulley (California version).
E x h a u s t S y s t e m , E m i s s i o n C o n t r o l