Calais L4-138 2.3L VIN D FI (1990)
Refrigerant Pressure Sensor / Switch: Technical Service Bulletins
A/C - O-Ring Push Out During Installation
SUBJECT:
SERVICE PROCEDURE O-RING PUSH OUT DURING HI SIDE SWITCH INSTALLATION
MODELS/YEARS:
1988-1990 CUTLASS CALAIS AND 1988 FIRENZA
MODELS WITH C60
NUMBER:
90-T-04
CORP. REF. NO: 971206
DATE:
August 1989
SECTION:
1B
Figure 1
Due to a stack up of tolerances between the high side pressure switch or sensor and the high side port, some difficulty may be encountered when
replacing a switch or sensor with the refrigerant system changed. The Schraeder (R) valve may be depressed before the O-ring is captured by the switch
resulting in the Oring being pushed out of its sealing area causing a leak.
On vehicles with this condition, the O-ring may be held in place by wrapping a string around the inboard side of the switch port while the switch is being
screwed on (refer to Figure 1). This will hold the O-ring in the switch port while the Schraeder (R) valve is being depressed. Once the O-ring is captured,
the string should be removed and the switch screwed on until fully seated. The joint should then be leak checked with a refrigerant detector.
Redesigned parts will be in production during the 1990 model year.
