A/c Compressor Servicing Buick Century V

A/C COMPRESSOR REFRIGERANT SPECIFICATIONS

Note. Due to late changes, always refer to underhood A/C specification label in engine compartment or A/C compressor label while servicing A/C system. If A/C specification label specifications listed here differ, use label specifications.

REFRIGERANT OIL & REFRIGERANT CAPACITY - CARS

REFRIGERANT OIL & REFRIGERANT CAPACITY - CARS (1)

REFRIGERANT OIL & REFRIGERANT CAPACITY - LIGHT TRUCKS, VANS

REFRIGERANT OIL & REFRIGERANT CAPACITY - LIGHT TRUCKS & VANS

COMPRESSOR APPLICATIONS - CARS

COMPRESSOR APPLICATIONS - CARS (1)

COMPRESSOR APPLICATIONS - LIGHT TRUCKS & VANS

COMPRESSOR APPLICATIONS - LIGHT TRUCKS & VANS (1)

BODY DESIGNATIONS - CARS

BODY DESIGNATIONS - CARS

BODY DESIGNATIONS - LIGHT TRUCKS & VANS

BODY DESIGNATIONS - LIGHT TRUCKS & VANS

CLUTCH ASSEMBLY

Removal

1. Using Clutch Plate Spanner (J-25030 for HD6/HR6-HE compressor or J-33027-A for V5 compressor), hold clutch plate and remove crankshaft nut. Use Clutch Plate Remover/Installer (J-33013-B) to remove clutch plate. (Scheme 1)or (Scheme 2). Remove key from shaft.
2. Remove snap ring. Install Guide (J-33023-A) on front head. Position Puller (J-33020) in slots on pulley assembly. Tighten puller and remove pulley assembly.
3. Use hammer and Bearing Remover (J-9398-A) to drive bearing from pulley. Disconnect clutch coil lead.
4. Scribe marks on compressor and clutch coil for installation reference. Remove clutch coil using Puller Adapter J-33023-A) and 2-jaw puller.

Scheme 1

Scheme 2

Installation

1. Align reference marks. Using Puller Adapter (J-33024) and Puller Bar (J-8433-1), press clutch coil onto compressor. Restake clutch coil inner ring in 3 places, 120 degrees apart.
2. If bearing was removed from pulley, place pulley on Support (J-21352-A). DO NOT support pulley on flat surface, or pulley will be damaged. Install bearing in pulley using hammer, Handle (J-29886) and Bearing Installer (J-948-1).
3. With pulley on support, stake pulley in 3 places, 120 degrees apart. Position pulley on compressor.
4. Place Bearing Installer (J-33017) and Puller Guide (J-33023-A) over inner race of bearing. Using puller, press pulley assembly onto compressor. Install snap ring. Install key in clutch plate, allowing key to protrude about 1/8" from rear of clutch plate.
5. Install clutch plate on compressor crankshaft. Using clutch plate remover/installer, press clutch plate onto compressor until a clutch assembly clearance of .020-.030" (.51-.76 mm) is achieved.
6. Using spanner, install crankshaft nut. Tighten crankshaft nut to 12.5 ft. lbs. (17 N.m). Check components for proper rotation.

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Using Clutch Plate Spanner (J-25030 for HD6/HR6-HE compressor or J-33027-A for V5 compressor), hold clutch plate and remove crankshaft nut. Thread Clutch Plate Remover/Installer (J-33013-B) into clutch plate, and remove clutch plate. (Scheme 1)or (Scheme 2).
2. Remove shaft seal snap ring. Ensure all surfaces around seal are clean. Install Shaft Seal Protector (J-34614) over compressor shaft. Insert Shaft Seal Remover/Installer (J-23128-A) into shaft seal.
3. Rotate handle clockwise to seat seal remover/installer in seal. Remove shaft seal. Using "O" Ring Remover (J-9553-01), remove "O" ring.

1. With shaft seal protector in place, lubricate new "O" ring with refrigerant oil and install it on "O" Ring Installer (J-33011).
2. Insert "O" ring installer in compressor until it bottoms. Move slide on "O" ring installer downward until "O" ring is released into groove. Rotate installer to seat "O" ring. Remove "O" ring installer.
3. Lubricate shaft seal with refrigerant oil. Expand seal using shaft seal remover/installer. Install seal on Seal Protector (J-34614). Place seal protector over shaft. Push shaft seal into compressor using a rotary motion until seal bottoms.
4. Install new snap ring with flat side against seal. Install clutch plate on compressor crankshaft.
5. Using clutch plate remover/installer, press clutch plate onto compressor until a clutch assembly clearance of .020-.030" (.51-.76 mm) is achieved.
6. Using spanner, install crankshaft nut and tighten it to 12.5 ft. lbs. (17 N.m). Evacuate and recharge system. Check for leaks.

Removal (Serpentine Belt Drive)

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain oil from compressor, and measure amount drained. Mount compressor on Holding Fixture (J-25008-A), and secure fixture in a vise. Using Clutch Plate Spanner (J-33027-A), remove crankshaft nut.
2. Thread Clutch Plate Remover (J-33013-B) into clutch plate. Hold body of clutch plate remover. Tighten center bolt to remove clutch plate. Remove crankshaft key. (Scheme 3) Remove rotor snap ring.
3. Install Puller Guide (J-25031) on compressor shaft. Using Puller (J-33020), pull rotor from compressor.
4. If removing bearing, remove center screw from puller. Invert assembly on solid surface. Using hammer, Handle (J-29886) and Bearing Remover (J-9398-A), drive bearing from rotor.
5. Scribe reference marks on compressor and clutch coil for installation reference. Install puller guide on compressor shaft. Using Puller (J-25287), pull clutch coil from compressor.

1. Using hammer, Handle (J-29886) and Rotor/Bearing Installer (J-26271-A), install clutch coil. Ensure reference marks align.
2. If bearing was removed, place rotor on Support (J-21352-A). DO NOT support on flat surface, or assembly will be damaged. Using hammer, Handle (J-29886) and Rotor/Bearing Installer (J-26271-A), install bearing in rotor. Stake rotor in 3 places, 120 degrees apart.
3. Install rotor assembly on front head. Drive rotor on front head using hammer, Handle (J-29886) and Rotor/Bearing Installer (J-26271-A). Install snap ring.
4. Install crankshaft key, allowing key to protrude about 3/16" from rear of clutch plate. Install clutch plate on compressor crankshaft.
5. Using Clutch Plate Installer (J-9401-B), press clutch plate onto compressor until clearance between clutch plate and rotor is .020-.030" (.51-.76 mm).
6. Using spanner, install NEW crankshaft nut and tighten it to 10 ft. lbs. (14 N.m). Check components for proper rotation. Using new refrigerant oil, add same amount of oil to compressor as was drained from it. Install compressor. Evacuate and recharge system. Check for leaks.

Removal ("V" Groove Belt Drive)

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain oil from compressor, and measure amount drained. Mount compressor on Holding Fixture (J-25008-A). Secure fixture in vise. Remove crankshaft nut using Clutch Plate Spanner (J-33027-A).
2. Thread Clutch Plate Remover (J-33013-B) into clutch plate. Hold body of clutch plate remover. Tighten center bolt to remove clutch plate. Remove crankshaft key. (Scheme 3) Remove rotor snap ring.
3. If removing rotor and bearing only, remove pulley rim bolts. If replacing clutch coil, DO NOT loosen or remove pulley rim bolts. Pulley rim bolts will pull clutch coil off when rotor is removed.
4. If clutch coil is being removed, scribe reference marks on compressor and clutch coil for installation reference. Install Puller Guide (J-25031) on compressor shaft. Using internal-jaw puller, remove rotor assembly from compressor.
5. If removing clutch rotor, remove pulley rim bolts. Separate clutch coil from pulley rim. If removing bearing, place clutch assembly on wooden block. Using hammer, Handle (J-29886) and Bearing Remover (J-9398-A), drive bearing from rotor.

1. If bearing was removed, install bearing in rotor using Bearing Installer (J-9481-A). Stake rotor in 3 places, 120 degrees apart.
2. If clutch coil was removed, install coil in pulley rim. Coat pulley rim bolts with Loctite. Install bolts, but DO NOT tighten them yet. CAUTION: Ensure protrusions on rear of clutch coil align with holes in front head.
3. On all applications, install rotor assembly on front head. Using hammer, Handle (J-29886) and Rotor/Bearing Installer (J-26271-A), install rotor assembly. Ensure reference marks align.
4. Install snap ring. Tighten pulley rim bolts to 100 INCH lbs. (11 N.m). Install crankshaft key, allowing key to protrude about 3/16" (4.7 mm) from rear of clutch plate. Install clutch plate on compressor crankshaft.
5. Using Clutch Plate Installer (J-9401-B), press clutch plate onto compressor until clearance between clutch plate and rotor is .020-.030" (.51-.76 mm).
6. Using spanner, install new crankshaft nut and tighten it to 10 ft. lbs. (14 N.m). Check components for proper rotation. Using new refrigerant oil, add to compressor the same amount of oil drained from it. Install compressor. Evacuate and recharge system. Check for leaks.

Scheme 3

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Use Clutch Plate Spanner (J-33027-A) to remove crankshaft nut. Thread Clutch Plate Remover (J-33013-B) into clutch plate. Hold body of clutch plate remover. Tighten center bolt to remove clutch plate. Remove crankshaft key. (Scheme 3)
2. Remove shaft seal snap ring. Ensure seal area on compressor is clean. Insert Shaft Seal Remover/Installer (J-23128-A) into shaft seal.
3. Rotate handle clockwise and remove shaft seal. Using "O" Ring Remover (J-9553-01), remove "O" ring.

1. Lubricate new "O" ring with refrigerant oil, and install it on "O" Ring Installer (J-33011). Insert "O" ring installer in compressor until installer bottoms.
2. Move slide on "O" ring installer downward until "O" ring is released into groove. Rotate installer to seat "O" ring.
3. Coat shaft seal with refrigerant oil. Install seal on shaft seal remover/installer. Expand seal using shaft seal remover/installer.
4. Install Shaft Seal Protector (J-34614) through seal. Install seal on shaft seal protector so seal lip is toward compressor. Remove shaft seal remover/installer.
5. Install shaft seal protector over end of compressor shaft. Push shaft seal into compressor until it bottoms. Install new shaft seal snap ring with flat side against seal.
6. Install crankshaft key, allowing key to protrude about 3/16" (4.8 mm) from rear of clutch plate. Install clutch plate on compressor crankshaft.
7. Using Clutch Plate Installer (J-9401-B), press clutch plate onto compressor until clearance between clutch plate and rotor is .020-.030" (.51-.76 mm).
8. Using spanner, install new crankshaft nut and tighten it to 10 ft. lbs. (14 N.m). Check components for proper rotation. Install compressor. Evacuate and recharge system. Check for leaks.

1. Remove and discard compressor shaft bolt. Remove clutch plate and shims. Tap on clutch plate using a soft-faced hammer (if necessary).
2. Remove pulley assembly snap ring. Remove pulley assembly. Remove snap ring, and disconnect clutch coil lead. Remove clutch coil.

1. Align clutch coil pin in back of coil with hole in front housing, and install clutch coil. Install snap ring with beveled side away from compressor.
2. Install pulley assembly. Install snap ring with beveled side away from compressor. Coat splines of compressor shaft with White lithium based grease. If reusing original clutch plate and pulley, old shims can be used.
3. If installing new components, install one thin shim. Install clutch plate. Tighten compressor shaft bolt to 10 ft. lbs. (14 N.m). DO NOT use air tools to tighten bolt.
4. Using feeler gauge, measure air gap between clutch plate and pulley surface in 3 areas. Proper clearance is .014-.026" (.36-.66 mm). Adjust shim thickness to obtain correct clearance.
5. Once compressor shaft bolt is tightened, recheck clearance between clutch plate and pulley surface in 4 places. Readjust clearance if necessary.

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain oil from compressor, and measure amount drained. Remove clutch assembly.
2. Remove felt dust seal and dust seal retainer from front head. (Scheme 4) Remove shaft seal snap ring. Position front head (nose up) on cardboard placed on a flat surface. Using brass drift, press shaft seal from front head.

1. Lubricate new shaft seal with refrigerant oil. DO NOT touch sealing surfaces. Press seal into front head, and install snap ring. Install felt dust seal and dust seal retainer.
2. Lubricate Shaft Seal Protector (J-34614) and front head "O" ring with refrigerant oil. Install shaft seal protector on crankshaft. Install a new front head "O" ring on cylinder assembly.
3. Install front head on cylinder assembly. Ensure dowel pins are aligned. Use care when guiding shaft seal protector through seal opening. Remove shaft seal protector.
4. Install through-bolts and new brass washers. Diagonally tighten bolts to 19 ft. lbs. (26 N.m). Using INCH-lb. torque wrench, check compressor shaft rotating torque. Rotating torque should be 43 INCH lbs. (5 N.m) or less. Install clutch assembly.
5. Using new refrigerant oil, add same amount of oil to compressor as was drained from it. Install compressor. Evacuate and recharge system. Perform leak test. See LEAK TESTING in the «A/C SYSTEM GENERAL SERVICING»(/buick/century/v-1982-1996/remont/general-servicing-all-makes/#ac-system-general-servicing) article in the AIR CONDITIONING & HEAT section.

Scheme 4

1. Hold clutch using Clutch Holder (J-33027-A). Remove compressor shaft bolt. Remove clutch plate and shims.
2. Remove pulley assembly snap ring. Remove pulley assembly and snap ring. Disconnect clutch coil lead. Remove clutch coil.

1. Install clutch coil so pin in back of coil aligns with hole in front housing. Install snap ring.
2. Install pulley assembly and snap ring. Install clutch plate and shims. Tighten compressor shaft bolt to 10 ft. lbs. (14 N.m). DO NOT use air tools to tighten bolt.
3. Using feeler gauge, measure air gap between clutch plate and pulley surface in 3 areas. Proper clearance is .004-.008" (.10-.20 mm). Adjust shim thickness to obtain correct clearance.
4. Once compressor shaft bolt is tightened, recheck clearance between clutch plate and pulley surface in 4 places. Readjust clearance if necessary.

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain oil from compressor, and measure amount drained.
2. Remove clutch assembly. Remove front head bolts. Separate front head and "O" ring from compressor. (Scheme 4)
3. Remove felt dust seal and dust seal retainer from front head. Remove shaft seal snap ring. Press seal from front head.

1. Lubricate new shaft seal and seal cavity of front head with refrigerant oil. Press seal into front head, and install snap ring.
2. Lubricate front head "O" ring with refrigerant oil. Install front head "O" ring on cylinder assembly. Install Shaft Protector (J-34614) on compressor shaft. Install front head on cylinder assembly. Ensure dowel pins align.
3. Install all through-bolts and new washers. Tighten through-bolts to 19 ft. lbs. (26 N.m). Remove shaft protector. Install felt dust seal and dust seal retainer. Using INCH-lb. torque wrench, check compressor shaft rotating torque. Rotating torque should be 43 INCH lbs. (5 N.m).
4. Install clutch assembly. Using new refrigerant oil, add same amount of oil to compressor as was drained from it. Install compressor. Evacuate and recharge system. Perform leak test. See LEAK TESTING in the «A/C SYSTEM GENERAL SERVICING»(/buick/century/v-1982-1996/remont/general-servicing-all-makes/#ac-system-general-servicing) article in the AIR CONDITIONING & HEAT section.

1. Using Spanner (J-37872), hold clutch and remove compressor shaft nut. Using Puller (J-37825), remove clutch plate. Remove key from compressor shaft.
2. Remove pulley snap ring. Install jaws of Puller (J37828) in snap ring groove on pulley. Place Shaft Protector (J-29640) on compressor shaft.
3. Install puller plate on jaws. Thread 2 bolts through puller plate into jaws. Remove pulley from compressor. Remove snap ring and clutch coil.

1. Install clutch coil and snap ring on compressor. Support compressor on rear mounting ears.
2. Using hammer, Handle (J-29886) and Driver (J-38467), install pulley assembly. Ensure driver rests on inner race of bearing when installing pulley assembly. Install snap ring.
3. Install shims. Install key in compressor shaft. Using hammer and Shaft Protector (J-29640), install clutch plate on compressor shaft. Tighten compressor shaft nut to 25-30 ft. lbs. (34-41 N.m).
4. Using feeler gauge, measure clearance between clutch plate and pulley assembly in several areas. Clearance should be .016-.031" (.41-.79 mm). If clearance is not within specification, adjust shim thickness to obtain correct clearance.

1. Discharge A/C system using approved refrigerant recovery/recycling equipment. Remove compressor. Drain oil from compressor, and measure amount drained. Remove clutch assembly.
2. Remove key from shaft. Remove felt ring metal retainer and felt ring. Using small screwdriver, remove shims for clutch plate.
3. Ensure area around seal is clean. Remove shaft seal snap ring. Using Shaft Seal Remover/Installer (J-33011), remove shaft seal.
4. Install Shaft Seal Remover/Installer (J-23128-A) into shaft seal. Press downward on shaft seal remover/installer and rotate it to engage tangs with slots of shaft seal. Pull shaft seal from compressor.

1. Install Shaft Protector (J-29640) over compressor shaft. Coat shaft protector, new shaft seal and shaft seal seat with refrigerant oil. DO NOT touch sealing surfaces of seal.
2. Place seal on seal remover/installer, and twist tool to hold seal. Install seal in compressor, and twist tool in opposite direction to release seal. Remove seal remover/installer. Using shaft seat remover/installer, install shaft seat.
3. Install snap ring. Tap on snap ring to ensure it seats in groove (if necessary). Install shims and new felt. To install remaining components, reverse removal procedure. Using new refrigerant oil, fill compressor with the same amount of oil drained from it. Install compressor. Evacuate and recharge system. Perform leak test. See LEAK TESTING in the «A/C SYSTEM GENERAL SERVICING»(/buick/century/v-1982-1996/remont/general-servicing-all-makes/#ac-system-general-servicing) article in the AIR CONDITIONING & HEAT section.

Note. Removing compressor is not necessary to service clutch assembly.

1. Loosen tensioner and remove drive belt from pulley. Remove coolant/washer reservoir screws. Disconnect electrical harness from coolant reservoir. Release heater return pipe clips. Lift coolant/washer reservoir out of the way.
2. Using Clutch Holder (SA9149AC-4) and 10-mm deep socket, remove clutch drive plate center bolt. Insert drive plate holder sleeve into drive plate. Install remover bolt. While holding clutch remover handle, tighten remover bolt to remove drive plate. DO NOT lose shims.
3. Remove pulley snap ring. Position puller Center Adapter (SA9149AC-2) over end of compressor shaft. Attach 3-jaw puller to back of pulley. Tighten puller bolt against center adapter. Remove pulley. Remove clutch coil screws. Disconnect clutch coil wire. Remove clutch coil.

1. Install coil in original position. Tighten screws to 35-52 INCH lbs. (3.9-5.9 N.m). Install drive bolt, Drive Plate Installer (SA9149AC-3) and thrust bearing assembly through center of pulley. Finger tighten pulley installation bolt into compressor shaft.
2. Finger tighten nut on installation bolt to align pulley to compressor. Tighten nut until pulley bottoms in compressor. Loosen nut and remove installation bolt. Install snap ring with tapered side out.
3. Install drive plate on holder. Place thrust bearing on installation bolt. Insert installation bolt through drive plate. Place shims on installation bolt. Thread bolt into compressor shaft. Slide drive plate over splines of compressor shaft. While holding end of installation bolt, tighten nut until drive plate bottoms. Loosen nut and remove installation bolt. Install center bolt. Tighten center bolt to 104-130 INCH lbs. (11.8-14.7 N.m).
4. Using a feeler gauge, check clearance between drive plate and pulley. Clearance should be .01"-.02" (.3-.5 mm). If clearance is not as specified, add or remove shims as necessary.

SHAFT SEAL

Information is not available from manufacturer.

See also:
• A/C SYSTEM GENERAL SERVICING