Grand AM V6-181 3.0L (1985)
Expansion Block/Orifice Tube: All Technical Service Bulletins
A/C - Hiss Noise
Number 85-1-4A
Date 4/85
Subject:
AIR CONDITIONING "HISS" NOISE
1985 GRAND AM
CONDITION:
Air conditioning system may make a "hiss" noise during idle and low speed conditions with the A/C "on".. The sound generally comes from the center
of the instrument panel and through the air outlets. The noise may not occur duringhighest ambient temperature conditions. (Affected vehicles: prior to
VIN 700689.)
CAUSE:
Refrigerant flowing through the orifice located in the evaporator inlet tube at the dash is the source of the "hiss".
A/C REFRIGERANT LINE
CORRECTION:
1.
Follow procedure outlined in Section 1B, Air Conditioning, 1985 Grand Am Service Manual for discharging system.
2 .
Remove the orifice in the evaporator inlet tube at the dash
pass-thru location and discard. Discard the forward clip.
3.
Remove the condenser outlet-evap inlet tube assembly (P/N 10031683). Discard, and replace with P/N 10038431, Tube and Orifice Assembly.
Use refrigerant lube on O-rings and torque bolts to 12 N-m (9 ft.lbs.) on the condenser end and 17 N-m (12 ft.lbs.) on the evaporator (dash) end.
Rear tube clip must be reinstalled.
4.
Evacuate and recharge.
WARRANTY INFORMATION
Labor Operation
T3136
Labor Time
1.5 Hrs.
(Includes System Recharge)