S5 Workshop Manual
Engine
EM-11
Inspection before Dismantling:
1. Inspect whether the pulley has crack, abrasion and oil stain. If yes, please replace it.
2. Inspect whether the pulley is correctly installed in the groove of belt pulley.
3. Inspect the deflection of belt in the middle point of the pulley.
Notes:
■ The inspection should be conducted when the engine is in cooling condition, or
turned off for 30 mins.
■ Use
a pulley tensometer for inspection.
■ If the deflection value exceeds limit value, adjust it.
Dismantling:
1. Unscrew locking bolt of power steering pump belt, select the tension of adjusting
bolt, and then loosen power steering pump and air conditioning compressor drive belt.
2. Remove power steering pump and air conditioning compressor drive belt.
3. Unscrew adjusting locking bolts of electric generator, and then loosen engine drive
belt.
4. Remove electric generator drive belt from electric generator pulley.
Installation:
1. Install belt onto the pulley according to the reverse order of dismantling.
Notes:
■ After replacing belt, adjust its "new belt" value to make it suitable for pulley
groove.
■ When installing belt, make sure that the belt and pulley groove are aligned and
arranged correctly.
■ Do not splash engine oil, power steering fluid and engine coo
lant onto belt and each
pulley groove.
■ Do not excessively wind or bend the belt.
2. Adjust the tension of belt. First adjust it to the specified value, and then rotate
crankshaft for two circles. Re-inspect whether it reaches the specified value, to avoid
the deflection change between pulleys.
3. Tighten bolts and nuts to the specified torque.
4. Make sure that the tension of all belts is within standard range.
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