A/C - O-Ring Replacement & Updated Torque
Bulletin 85-1-17ADate Aug. '85
Ref. No. 85-201A-1
O-RING CONFIGURATION:
EVAPORATOR BLOCK FITTING:
SUBJECT: A/C SYSTEM REPLACEMENT O-RINGS
MODELS AFFECTED: 1984 SKYHAWK, ALL 1985
NOTE: This bulletin supersedes Bulletin 85-1-17 dated April, 1985. Please discard original bulletin and replace it with this one.
All 1985 Buicks and the 1984 Skyhawk may use "captured"-type O-rings at refrigerant hose and tube connections. All other past model Buicks use the "standard type" O-ring configuration. The A/C compressor ports to hose assembly continues to use a special O-ring. A new O-ring, specifically for the 3/4" tube of an evaporator/condenser block fitting, has been released. The 1/2" tube of the evaporator/condenser block fitting and the 3/8" tube of the condenser block fitting will continue to use the previous captured O-ring..
The torque specification for the evaporator block fitting bolt (1) has been revised to:
Evaporator Block Fitting Bolt (1), 17 N-m (12 ft.lbs.) Condenser Block Fitting Bolt (1), 12 N-m (9 ft.lbs.)
Replacement O-rings are available from GMWDD under the following part numbers:
TUBE O.D.
3/8" 1/2" 3/4"
CAPTURED P/N 3053197 3053203 3053204
GR.# 9.242 9.196 9.196
STANDARD P/N 6555088 3140600 6556521
GR.# 9.196 8.955 9.214
COMPRESSOR PORTS P/N 5887997
GR.# 9.226
BLOCK FITTING P/N 3053197 3053203 3090774
GR.# 9.242 9.196 9.196