Compressor Leak Testing (V7 - Direct Mount)

Tools Required

• J 39400-A  Halogen Leak Detector. See Special Tools and Equipment .
• J 43600  ACR 2000 Air Conditioning Service Center. See Special Tools and Equipment .
• J 39893 Pressure Testing Connector

Fig 1: A/C Compressor Shaft & J 39893
Courtesy of GENERAL MOTORS CORP.
1. With the sealing washers in place, install the J 39893 on the rear head of the A/C compressor.
2. Connect the gage charging lines and the J 43600  . See Special Tools and Equipment .
3. Pressurize the suction and the high-side of the A/C compressor with R-134a refrigerant.
4. With the A/C compressor in a horizontal position, rotate by hand the A/C compressor shaft in the operating direction.
5. Rotate the shaft several times.
6. Using the J 39400 , check for leaks at the following locations:
   1. Pressure relief valve
   2. Rear head switch
   3. Front head seal
   4. Rear head seal
   5. Through bolt head gaskets
   6. A/C compressor shaft seal
7. Perform the measures necessary to correct any external leaks found.
8. Recheck for leaks following any repair.
9. Recover the refrigerant.
10. Disconnect the hoses from the J 39893 .
11. Remove the J 39893 .