LeSabre V6-181 3.0L (1986)
Expansion Block/Orifice Tube: Customer Interest
A/C Compressor - Repetitive Failure
Bulletin
87-1-1
Date
Nov., '86
Ref. No. 87-009-1
SUBJECT:
REPETITIVE AIR CONDITIONING COMPRESSOR FAILURE AND FLUSHING WITH REFRIGERANT 12
MODELS AFFECTED: ALL WITH AIR CONDITIONING
The use of air conditioning flushing to prevent repetitive failures of the compressor after an internal compressor failure has received recent attention.
After a compressor internal failure, the expansion (orifice) tube assembly should be removed and checked for contamination on the filter screens. If
contamination is noted, flush the system with Refrigerant 12 (R-12), following the procedure outlined in the 1987 Chassis Service Manual on pages
1B-14 and 15.
On cars where the expansion tube assembly is located at the evaporator inlet and evidence of contamination exists, an in-line filter/dryer should also be
installed. Installation of the filter/dryer is explained on Pages 1B-15 and 16 of the 1987 Chassis Service Manual.
On cars where the expansion tube assembly is remote from the evaporator inlet, the same flushing procedure should be followed and the expansion tube
assembly checked for contamination. Repeat the flushing procedure, if required, until the screens on the expansion tube assembly do not indicate new
contamination. An in-line filter is being developed for use with remote expansion tube assembly locations.
