A/C - Poor Cooling Performance, Inoperative
89mazda10Category 16
Applicable Model/s 1987 RX-7
Subject COMPRESSOR REFRIGERANT LEAKAGE
BuUetin No. 044/89
Issued 12/29/89
Revised
DESCRIPTION
If a customer complains of "poor air conditioning cooling performance" or "air conditioner doesn't work", it may be caused by the following condition:
Refrigerant R-12 may leak from bolt area which secures the hose assembly (block fitting) to the compressor cylinder head. This is caused by pin holes in the aluminum casting, between the bolt hole and the discharge port.
To determine if a vehicle needs to be inspected for leakage, confirm the following:
1. Check if the vehicles are within the following VIN range:
JM1FC33**H0500001-JMIFC33**H0543108
2. Check if a yellow mark has been painted on the compressor as shown in illustration. If so, compressor has already been tested for leakage by the manufacturer.
3. Check compressor Serial Number Date Code. (See example below)
^ If the compressor is manufactured after May 1987, the cylinder head has been modified.
^ If the compressor is manufactured prior to May 1987 and no yellow paint is noticeable, proceed to the following inspection procedures.
INSPECTION PROCEDURE
In addition to the normal diagnosis of the A/C system, the following inspection procedures must be exercised:
1. Precautions:
^ Halogen leak detector (Sensivity 0.5 oz/yr) should be used.
^ Probe tip of halogen leak detector should not touch any object. Faulty leak indication may result due to oil, water, etc.
^ Probe tip should not stay in the same spot any longer than two seconds. Faulty leak indication may result.
2. Inspection Procedures:
^ Using compressed air, blow area to be checked or use a clean towel to wipe away any oil deposits which may have been left from assembly.
^ Start the engine and run the air conditioner for 2 to 3 minutes at idle.
^ Turn off the engine and wait for 2 to 3 minutes.
NOTE:
Refrigerant R-12 easily disolves in oil and the presence of oil can cause a false indication of leakage.
^ Using leak detector, check for leakage at the area shown.
NOTE:
Be sure to move the probe tip around while checking.
^ If leakage is evident, blow air and check for leakage once again. If the leak detector still indicates leakage, the compressor should be replaced.
WARRANTY INFORMATION
Customer Comment Code: A1
Damage Code: AG
Process No: J7-001A
Part No. of Main Cause: 0000 67 D00A 6A
Operation No: U0505X-R-X (Compressor R&R) U0003X-R-X (Evacuation Charge)
Labor Hour: 0.7 (Compressor R&R) 0.5 (Evacuation Charge)