Q7 Quattro V8-4.2L (BAR) (2008)
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A/C Coupler O-ring: Service and Repair
O-Ring Seals For Refrigerant Circuit
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Always use only once, replacing.
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Lubricate with refrigerant oil before installing.
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Ensure seal fits properly on pipe or notch.
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Work in clean environment.
NOTE:
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Install only O-rings that are resistant to refrigerant R134a and corresponding refrigerant oil. These O-ring seals are color-coded to avoid
mistakes (currently "red", "light purple" and "dark purple").
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The O-ring dimensions - a - and - b - are different depending on installation location.
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In addition to the color-coded O-rings, black O-rings are also used in production for certain connections.