Beretta L4-121 2.0L (1987)
Service Port HVAC: All Technical Service Bulletins
A/C - Refrigerant Loss Prevention
Number:
91-284-1A
Section:
1A
Date:
APRIL 1991
Corp. Bulletin No.: 971202R
Subject:
AIR CONDITIONING REFRIGERANT LOSS DUE TO LOOSE OR MISSING ACCESS FITTING CAPS
Model and Year:
1980-91 PASSENGER CARS AND TRUCKS
All GM air conditioning Hi side and Low side access fittings are supplied with a black plastic cap and seal assembly which provides the primary
refrigerant seal for the service fittings.
If the cap and seal assembly is missing or loose, a significant amount of refrigerant may leak through the valve core located in the access fitting, which
could result in poor A/C performance or failure.
When servicing any vehicle's A/C system, make sure all access fitting cap seals (refer to Figure) are in place and tight. Caps should be threaded on until
contact with the "O" ring seal is made and then tightened another 1/4 - 1/2 turn to ensure proper sealing.
High Side
Low Side
Valve - Cap and Seal
Valve - Cap and Seal
P/N 52451233
P/N 6551640
Parts are currently available from GMSPO.
