Valve Plate, Head and Gasket, Removal and Installation
A/C Compressor Shaft Seal, Removing/Installing
Removing
WARNING:
- Follow all recommended safety precautions before performing any A/C system servicing. [1][2]Service Precautions
- Automotive refrigerants containing CFC's are hazardous to the earth's atmosphere. To protect our environment, use an Underwriters Laboratory (UL) approved refrigerant recovery/recycling unit such as Kent-Moore ACR3 or equivalent, whenever discharging an A/C system.
- The A/C system should only be serviced by trained personnel familiar with:
- equipment use
- related safety procedures
- regulations governing the discharging, handling and disposal of automotive refrigerants.
CAUTION:
- Some A/C compressor replacement parts are not available. Always check with your Parts Department for latest parts information before attempting compressor repairs.
- Always follow manufacturer's instructions when using a refrigerant recovery/recycling unit.
- discharge A/C refrigerant system using refrigerant recovery/recycling unit Kent-Moore ACR3 or equivalent.
Note: If the vehicle is received with no refrigerant in the A/C system , always replace the receiver drier.
- remove A/C lines from compressor
- plug A/C lines with a suitable plug to prevent moisture contamination of receiver drier
- remove compressor from vehicle
Note:
- Perform all A/C compressor repairs on a clean dry service bench equipped with a vise.
- When servicing A/C compressors, verify the model number of the compressor, for example SD-709, to insure correct replacement parts are ordered.
- remove drain plug 1 and O-ring 2 from compressor
- inspect 0-ring 2 for damage, replace if necessary
- drain refrigerant oil from compressor
- using measuring cup from recycling equipment, measure quantity of oil removed from compressor and quantity of oil removed during refrigerant discharging with Kent-Moore ACR3, record the total amount then discard used oil
- remove compressor cylinder head bolts 8 using 13 mm wrench
- remove compressor cylinder head 7
Note: If necessary, use a small hammer and gasket scraper to lightly tap the outer edge of the cylinder head until it is free.
- inspect cylinder head 7 for damage, replace if necessary
Note: The cylinder head gasket 6 normally sticks to the valve plate 5.
CAUTION: Do not damage cylinder block, valve plate or head mating surfaces when removing head, valve plate and gaskets from compressor.
- using a gasket scraper, carefully remove any gasket material from cylinder head
- remove valve plate 5 and valve plate gasket 4 from compressor
- inspect compressor cylinder block 3 for damage and carefully remove any gasket material remaining on the compressor cylinder block
Installing
- coat cylinder block 3 mating surface with clean refrigerant oil
- install new valve plate gasket 4 insuring that gasket aligns with locator pins on cylinder block 3
- install new valve plate 5 in same manner
- coat top of valve plate 5 with clean refrigerant oil
- install and align new head gasket 6 on valve plate 5 locator pins
- coat cylinder head 7 mating surface with clean refrigerant oil
- install cylinder head 7 and head bolts 8
CAUTION: Use a beam type torque wrench. Damage may result from use of inaccurate "click" wrenches.
- torque head bolts according to sequence shown
- 30-34 Nm (22-25 ft lb)
- refill compressor with new refrigerant oil (same quantity measured previously)
If all or most of the refrigerant oil from the compressor is lost due to refrigerant leaks,
- refill compressor with 7Occ (2.36 oz) of new refrigerant oil
- inspect lubricate and install 0-ring 2 and drain plug 1 in compressor, replace 0-ring if damaged
- install compressor in vehicle
- remove plugs from A/C lines
- inspect and lubricate all A/C Hose O-rings with clean refrigerant oil, replace any damaged 0-rings
- install A/C lines (arrows) on compressor and tighten as follows:
- suction line: 35 Nm (26 ft lb)
- discharge line : 25 Nm (18 ft lb)
- install and properly tension compressor drive belt
- evacuate and charge A/C system
- check compressor clutch and A/C system for proper operation