A/C - Refrigerant Loss From Schrader Valve Caps

91caddy02
Bulletin No. T-91-66
File in Group 1
Number 74
Corp. Ref. No 971202R
Date March, 1991


SUBJECT: A/C REFRIGERANT LOSS DUE TO LOOSE OR MISSING ACCESS FITTING CAPS


MODELS AFFECTED: 1985-1991 DE VILLES AND FLEETWOODS 1982-1991 RWD DE VILLES AND BROUGHAMS 1986-1991 ELDORADOS AND SEVILLES 1982-1988 CIMARRONS 1987-1991 ALLANTES


This bulletin is being revised to include 1991 model years and to update a discontinued part number for high side valve cap and seal.


1985-1991 DeVilles and Fleetwoods, 1982-1991 RWD DeVilles and Broughams, 1986-1991 Eldorados and Sevilles, 1982-1988 Cimarrons, and 1987-1991 Allantes air conditioning High 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.

Figure 1 - Refrigerant Access Fitting:

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 ARE IN PLACE AND TIGHT. Refer to Figure 1. 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 (3/8 x 24) Valve-Cap and Seal (7/16 x 20)
P/N 52451233 P/N 6551640
Parts are currently available from GMSPO.