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 50... Leak-Testing With Leak Tester Device
Follow safety precautions when handling refrigerant. Refer to 64 50... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R 134a .
Carry out leak-testing with a leak tester device following the device manufacturer's operating instructions.
If leaks not to be localized are already identified during evacuation, the A/C system must nevertheless be filled. Refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) . Then test for leaks with leak tester device.
Therefore always conduct the leak test below the lines and components to be tested.
Shield lines and components against strong blasts of air (wind, drawing off).
Tighten down loose lines, mark leaks.
Then draw off draw off A/C system and seal off or repair leakage points. Refer to 64 50 009 DRAWING OFF, EVACUATING AND FILLING A/C SYSTEM (R 134A) .
Then refill A/C system and test for leaks.
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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.