Skyhawk L4-121 2.0L VIN 1 TBI (1988)
![background image](/buick/skyhawk/l4-121_2.0l_vin_1_tbi/Page-276001.png)
Refrigerant: Technical Service Bulletins
Compressor Availability
A new compressor for use with R-134a systems will be shipped with the correct amount of PAG oil installed (see "IMPORTANT" below). Do not add
any additional oil in Step 5 of the retrofit procedure if a compressor is to be replaced with a new R-134a compressor at the same time the initial retrofit is
being done.
Important:
During 1996, "oil-less" compressors began to be serviced with NO added oil. New part numbers will be issued, and both the box and the compressor
will be clearly marked to indicate that no oil is present. If you receive one of these newer compressors, simply add the normal amount of oil to the
system in Step 5 of the retrofit procedure (8 oz of PAG oil, or 9 oz of PAG oil with V5 compressor). These "oil-less" compressors are compatible
with EITHER R12 or R-134a.