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.
64 51... Leak-Testing Condenser
Special Tools Required
Risk of injury!
Refrigerant circuit is under high pressure!
Handling R134a refrigerant: see SAFETY INSTRUCTIONS and INSTRUCTIONS FOR HANDLING .
Comply with the standard national safety instructions and precautions on handling nitrogen.
Ensure that employees are advised of how to handle pressurized vessels and nitrogen correctly (danger of asphyxiation). For this purpose, follow the notes and instructions in the technical safety specifications available from the gas supplier.
Necessary preliminary tasks:
- Drain off refrigerant from A/C system. See DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R134A) .
- Detach refrigerant lines from condenser
Tightening torque 64 53 6AZ
Risk of damage!
Special tool 64 5 122 and special tool 64 5 123 have different diameters (A, B) at the seal plugs!
Ensure correct connection assignment on condenser.
Replace sealing rings (1) prior to each use.
Fit and secure sealing adapter 64 5 123 to connection of low-pressure line.
Fit and secure test adapter 64 5 122 to connection of low-pressure line.
Tightening torque 64 53 6AZ
Connect special tool 64 5 122 to special tool 64 5 121 .
NO RELATED
Use the Manual With the Right Hardware
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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.