A3 Quattro V6-3.2L (BUB) (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 O-rings only once, replace.
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Coat O-ring seals with refrigerant oil before inserting.
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Make sure O-rings are seated properly on pipe or in groove.
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Perform work free of contamination (even the smallest deposit e.g. a hair, may lead to a leak).
NOTE:
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Install only O-rings that are resistant to refrigerant R134a and corresponding refrigerant oil. These O-rings 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.
