G 20 Van V6-262 4.3L VIN Z (1993)
Accumulator HVAC: Technical Service Bulletins
A/C - Compressor Noise On Start-Up
Group Ref.: HVAC
Bulletin No.: 361204
Date: December, 1993
SUBJECT:
AIR CONDITIONING COMPRESSOR "SLUGGING" OR RATTLING ON START-UP (REPLACE ACCUMULATOR)
MODELS:
1993 CHEVROLET AND GMC G VANS WITH HR6 AIR COMPRESSOR
CONDITION:
Some owners may comment on an audible "slugging" or rattling noise coming from the compressor when the vehicle is started and the air conditioning
system is on.
CAUSE:
Refrigerant from the accumulator may propagate to the air compressor where it can condense to a liquid state. With the engine off, the refrigerant
collects inside the compressor cavity. When the engine is started and the air conditioner is on, the liquid refrigerant passes through the compressor
causing the slugging or rattling sound. The sound will go away once the refrigerant has passed through the compressor.
CORRECTION:
A new accumulator with a pressure equalization hole must be installed. This new accumulator will minimize refrigerant transfer to the compressor.
SERVICE PARTS INFORMATION
P/N
Description
QTY
2724885
Accumulator Asm.
1
