Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2011Q5 QUATTRO (8RB) V6-3.2L (CALB)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRPROCEDURESREFRIGERANT CIRCUIT O-RINGS
2011 Audi Q5 Quattro (8RB) V6-3.2L (CALB)
Refrigerant Circuit O-Rings
2011 Audi Q5 Quattro (8RB) V6-3.2L (CALB)SECTION Refrigerant Circuit O-Rings
Refrigerant Circuit O-rings
• Always use O-rings only once, replace.
• Coat the O-rings with refrigerant oil before installing.
• Make sure O-rings are seated properly on pipe or in groove.
• Check the connections on the components and refrigerant lines for damage (even a small scratch can lead to leakage).
• Perform the work under clean conditions (even the smallest deposit such as a hair may cause a leak).
• Install only O-rings that are resistant to refrigerant R134a and corresponding refrigerant oil. The O-rings are color-coded to avoid mistakes (currently "red", "light purple" and "dark purple"). Refer to the Electronic Parts Catalog.
• The O-ring dimensions - a - and - b - are different depending on installation location. Refer to the Electronic Parts Catalog.
• In addition to the color-coded O-ring seals, use is also made at the factory of black O-ring seals for certain connections.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.