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Compressor Leak Test

WARNING: This page is about a different car, the 1996 Oldsmobile LSS, 1996 Oldsmobile Eighty-Eight, and 1996 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install Pressure Gauge (J-22124-B ) to air dryer with shutoff valve located on compressor side of gauge. See Figure . With shutoff valve open, apply shop air pressure through service valve on pressure gauge until gauge reaches 100-120 psi (7.0-8.4 kg/cm2 ).
  2. Using soapy water solution, check for leaks around air dryer cover, air dryer "O" ring casting bore, edge of cover gasket, edge of solenoid valve housing, and head casting air intake and exhaust opening. See Fig 1 .
  3. If leak exists at cover bolts, sequentially tighten bolts to specification. See Figure . See TORQUE SPECIFICATIONS  . Recheck compressor for leaks. Remove pressure gauge
Fig 1: Checking Compressor For Leaks
G95B14564Courtesy of GENERAL MOTORS CORP.
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