A8 Quattro Sedan V8-4.2L (AUX) (2001)
Drive Belt: Adjustments
Checking and adjusting alignment of ribbed belt
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Position alignment gauge -3201- on pulley of A/C compressor.
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Pump pulley must be aligned with pulley of A/C compressor.
If the two pulleys are not aligned:
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Unbolt pump pulley.
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Install shims (available as replacement parts) so that both pulleys are aligned.
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Install ribbed belt and remove pin -3204-.