A/C - O-Ring Replacement & Updated Torque
85-1141B
AUG., 1985
Subject: A/C REPLACEMENT O-RINGS
Model and Year: 1984-85 CAVALIER 1985 IMPALA/CAPRICE
TO: ALL CHEVROLET DEALERS
TUBE ASSEMBLY:
EVAPORATOR BLOCK FITTING:
This bulletin supersedes Chevrolet Dealer Service Bulletin 85-42, dated February, 1985, which should be destroyed.
All 1985 Impala/Caprice models and the 1984-85 Cavalier use "captured"- type O-rings at refrigerant hose and tube connections. All other past model Chevrolets 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