EXPERTEC TSB (85-1)

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

A/C SYSTEM REPLACEMENT O-RINGS - CAPTURED-TYPE O-RINGS

Model(s): 1984-85 GM "J" Series Vehicles

Bulletin No.: Chevrolet 85-114

Oldsmobile 36-1

Buick 85-1-17A

Cadillac T85-46A

Date: February 12, 1985

SERVICE INFORMATION

All 1985 models and the 1984 "J" series use "captured" -type o-rings at refrigerant hose and tube connections. All other past models use the "standard type" o-ring configuration. The A/C compressor ports to hose assembly continues to use the speicial o-ring. A new o-ring, specifically for the 3/4 inch tube of an evaporator/condensor block fitting, has been released. The 1/2 inch tube of the evaporator/ condensor block fitting will continue to use the previous captured o-ring.

TORQUE SPECIFICATIONS

• Evaporator Block Fitting Bolt (1) 12 ft-lb
• Condensor Block Fitting Bolt (1) 9 ft-lb

TUBE O.D.

Description	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	P/N	5887997
Ports	GR.#	9.226
Block	P/N	3053197	3053203	3090774
Fittings	GR.#	9.242	9.196	9.196

When replacing A/C system o-rings, the correct size and type should be carefully determined. Installing o-rings of improper size and/or type may result in a refrigerant leak.