Regal V6-231 3.8L VIN L SFI (1990)
![background image](/buick/regal/v6-231_3.8l_vin_l_sfi/Page-2470001.png)
Evaporator Core: All Technical Service Bulletins
A/C - Refrigerant Leaks at Evaporator
Bulletin:
90-1-14
Date:
June, '90
Ref. No.: 90-140-1
Corp. Ref. No.: 071201R
SUBJECT:
REDUCTION OF POSSIBLE REFRIGERANT LEAKS AT THE EVAPORATOR BLOCK - INSTALL CAPTURED "O" RINGS
MODELS AFFECTED: 1990 REGAL
Just after the start of production (VIN's could not be determined) on the 1990 Regal, the inlet and outlet fittings to the evaporator were changed from a
standard "O" ring design to a captured "O" ring design to reduce leaks. When making necessary repairs at the evaporator, if new "O" rings are needed,
make sure the correct captured design "O" rings are used.
The captured "O" ring part numbers are as follows:
1/2 Pipe "O" Ring - 52454645
3/4 Pipe "O" Ring - 52454646
Parts are currently available from GMSPO.
The opposite end of these fittings are the standard "O" ring design.