Leak Test - Process Overview

WARNING: Avoid breathing A/C Refrigerant-134a and lubricant vapor or mist. Exposure may irritate eyes, nose, and throat. To remove R-134a from the A/C system, use service equipment certified to meet the requirements of SAE J2210(R-134a recycling equipment). If accidental discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

NOTICE: A refrigerant leak test should be performed on the system whenever a leak is suspected and after performing a service operation that disturbs the components, lines, or connections. Many methods and special tools are available for this purpose; however, no matter which tool is used, care and diligence are the biggest keys to success.


Refrigerant System Checks

1. Visually inspect the outer surface the condenser core for restricted air flow.

2. Inspect the following components for restrictions or kinks:

- The condenser core

- The hoses

- The tubes

3. Inspect the blower fan operation.

4. Inspect the air ducts for leaks or restrictions.

5. Inspect for compressor clutch slippage.

6. Inspect the drive belt tension.

7. Inspect the compressor.

8. Inspect the cooling fans for proper operation.

9. Inspect for refrigerant leaks.

10. Inspect the front air deflector.


Leak Testing

NOTICE: The tracer dye J 41447 was developed for use with the A/C refrigerant 134a (R-134a) equipped vehicles or with vehicles that have been retrofitted from R-12 to R-134a. Do not use any other tracer dye in the R-134a system. Use of another dye may affect the system reliability and cause premature compressor failure. Use only a 1/4 oz. charge of the dye. Larger amounts may compromise the reliability of the A/C system. After adding the tracer dye, clean the service valves and all affected surfaces of the dye with GM Engine Degreaser GM P/N 1050436 or an equivalent in order to prevent a false diagnosis.