Engine Assembly fit your 1985 Buick Riviera

Currently shopping for
1985 Buick Riviera
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Vehicle Options
4-Speed Automatic Transmission, THM325-4L
Vehicle Options
4-Speed Automatic Transmission, THM325-4L
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Currently selected

Other Categories

Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware
Body Mounting, Air Conditioning, Audio/Entertainment
Body Wiring, Roof Trim
Brakes, Rear Axle, Propeller Shaft, Wheels, Tires
Frames, Springs, Shocks, Bumpers
Front End Sheet Metal, Heater
Front Suspension, Steering
Fuel System, Exhaust, Emission System
Interior Trim, Front Seat Trim, Seat Belts
Starter, Generator, Ignition, Electrical, Lamps
Transmission - Automatic
Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors
Categories Close X

Currently selected

Other Categories

Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware
Body Mounting, Air Conditioning, Audio/Entertainment
Body Wiring, Roof Trim
Brakes, Rear Axle, Propeller Shaft, Wheels, Tires
Frames, Springs, Shocks, Bumpers
Front End Sheet Metal, Heater
Front Suspension, Steering
Fuel System, Exhaust, Emission System
Interior Trim, Front Seat Trim, Seat Belts
Starter, Generator, Ignition, Electrical, Lamps
Transmission - Automatic
Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors
Sort by:
Recommended
Part No. & Part Description
Price & Qty.
Part No. &
Part Description
  • SENSOR, Computer Control Sensors
    15326386
    SENSOR, COOLANT TEMPERATURE (AT CYL HEAD)
    $51.06 $27.06
    1
    Add To Cart
  • 15326386
    SENSOR, COOLANT TEMPERATURE
    $51.06 $27.06
    1
    Add To Cart
  • Buick 19211437
    19211437
    SENSOR, EXHAUST OXYGEN
    $33.26 $15.80
    1
    Add To Cart
  • Buick 10045847
    10045847
    SENSOR, COOLANT TEMPERATURE
    $73.46 $35.37
    1
    Add To Cart
  • FILTER, Engine Oil Filter
    19210285
    FILTER, OIL (PF45)
    • Replaced By: 12731179
    $10.60 $5.91
    1
    Add To Cart
  • 19210284
    FILTER, OIL (PF 47)
    • Replaced By: 12731175
    $8.76 $4.88
    1
    Add To Cart
  • SEALANT, Maintenance Products
    12378521
    SEALANT, SILICONE ROOM TEMPERATURE VULCANIZING
    $23.51 $13.40
    6
    Add To Cart
  • 12378521
    SEALANT, SILICONE ROOM TEMPERATURE VULCANIZING SILICONE
    $23.51 $13.40
    6
    Add To Cart
  • 8654382
    Lubrication, Plug,Automatic Transmission Fluid Pressure Test Hole
    $7.20 $4.57
    1
    Add To Cart
  • BOLT, Engine Connecting Rod Cap
    25531956
    BOLT, CONNECTING ROD
    $3.71 $2.36
    1
    Add To Cart
  • Buick 22533854
    22533854
    BOLT, CONNECT ROD (3/8-24X2.39)
  • GASKET, Air Cleaner and Silencer
    25511809
    GASKET, AIR CLEANER
    $12.44 $8.32
    10
    Add To Cart
  • 25511809
    GASKET, AIR CLEANER & SILENCER(*KIT1)
    $12.44 $8.32
    10
    Add To Cart
  • BOLT, Intake & Exhaust Manifold
    Buick 88891769
    88891769
    BOLT, INTAKE MANIFOLD (3/8"-16X37MM)(LOCATING#2,4,5,9)
    $13.05
    1
    Add To Cart
  • 413496
    BOLT, EXHAUST MANIFOLD STUD (5/16-18X1 1/4)
  • 9420462
    BOLT, INTAKE&EXHAUST MANIFOLD HEAD(3/8-16X1.25)
  • PLUG, Plug Threaded
    Buick 15957435
    15957435
    PLUG, HEXAGON (1/4-18) PLAIN
    $2.32 $1.47
    1
    Add To Cart
  • 390919
    PLUG, HEXAGON (1/2-20) 260M STEEL
    $13.05
    1
    Add To Cart
  • Buick 444662
    444662
    PLUG, HEXAGON SOCKET (3/8-18) BRASS
    $6.28 $4.20
    1
    Add To Cart
  • SEAL, Fuel Injector Pump
    Buick 19178978
    19178978
    SEAL, FUEL INJECTOR & PRESSURE REGULATOR (7)
    $46.06 $24.41
    1
    Add To Cart
  • 22504915
    SEAL, PUMP TO ADAPT O-RING
  • Buick 559697
    559697
    SEAL, INJECTOR PUMP ADAPT TO MANIFOLD (ALSO PART OF 86-PART II)
  • WIRE, Spark Plug or Coil
    Buick 12036929
    12036929
    WIRE, SPARK PLUG(*01)
    $12.60
    1
    Add To Cart
  • Buick 12036968
    12036968
    WIRE, SPARK PLUG(*01)
    $13.90 $12.60
    1
    Add To Cart
  • BOLT, Starter Motor
    Buick 12337924
    12337924
    BOLT, STARTER MOTOR (3/8-16X4.66)
    $7.18 $4.56
    5
    Add To Cart
  • 14097278
    BOLT, START MOTOR TO BLOCK (3/8"-16 X 4 11/16")
    $7.47 $4.75
    1
    Add To Cart
  • 14097279
    BOLT, START MOTOR TO BLOCK (3/8"-16 X 1.87")(1985)(G)
    $11.33 $7.38
    1
    Add To Cart
  • Buick 1258674
    1258674
    BOLT, START (3/8-16X3 3/4)
  • Buick 1258675
    1258675
    BOLT, HEXAGON (3/8-16X2 13/64)
  • Buick 560613
    560613
    CLIP, CLIP, FUEL PIPE (2 PIPES)
    $105.58
    1
    Add To Cart
  • Buick 132915
    132915
    SCREW, SCREW,ROUND HEAD SLOTTED 10-32X.75 ZINC COATED (DIPPED OR PLATED)(AS REQUIRED)
  • Buick 15686047
    15686047
    BOLT/SCREW, BOLT/SCREW,5/16-18X.88 HX HEAD W/1.00 CONICAL WSR,PHOSPHATE,GM6174-M(AS REQUIRED)
  • STUD, Intake & Exhaust Manifold
    Buick 22505552
    22505552
    STUD, STUD (3/8-16X.56,3/8-16X2.00) 280M ZINC COATED (DIPPED OR PLATED)
  • Buick 22505552
    22505552
    STUD, STUD (3/8X16X.56X2)
  • Buick 25518197
    25518197
    STUD, INTAKE MANIFOLD (3/8"-16 X 33.5/M10X1.5X17)(LOCATING#1,6,7,8,10)(1985)
  • Buick 25523399
    25523399
    STUD, W/WASHER,INTAKE MANIFOLD TO HEAD (3/8-16X38MM/M8X1.25X25MM)(1984)
  • BOLT
    Buick 22506338
    22506338
    BOLT, STUD (5/16X18X1 1/2)(0.026)
  • 25519891
    BOLT, ENGINE FRONT COVER (4)
  • Buick 336793
    336793
    BOLT, /HEXAGON STUD 3/8-16X1.24 / 3/8-16X 0.75,1.0/0.64 THREAD LEN,280M,ZINC COATED (DIPPED OR PLATED)
  • Buick 9419293
    9419293
    BOLT, HEXAGON .438-20X1 300M PC(AS REQUIRED)
  • 9423842
    BOLT, FLANGE HEXAGON 5/16-18X1 3/8 PLAIN 300M(AS REQUIRED)
  • 9423842
    BOLT, VALVE ROCKER ARM PIVOT(5/16-18X1 3/8 PLAIN 300M)
  • Buick 563439
    563439
    LOCK, LOCK, EXHAUST MANIFOLD BOLT (1 BOLT LOCK)
  • 9437397
    RING, RING,RETAINER TYPE TH(FITS SHAFT DIAMETER 1.250 PLAIN
  • Buick 9440077
    9440077
    NUT, NUT, WING (1/4X20) PHOSPHATE ELECTRO ORGANIC
  • 11514596
    NUT, HEX FLANGED HEAD,M8X1.25,17.9 OUTSIDE DIAMETER,738 THICK,13MM HEXAGON,10, PHOSPHATE ZINC ORGANIC - FLAKE(AS REQUIRED)(8.915)
    $12.60
    1
    Add To Cart
  • 11515755
    BOLT, HEXAGON,M8X1.25X16,15 THREAD,18 O.D.,10.9,7114M(AS REQUIRED)(TOGETHER WITH 12345493 REPLCS 25534835)
    $13.05
    1
    Add To Cart
  • 11501033
    NUT, HEXAGON,M10X1.5,9.6THK,15.5 O.D.,10,CADMIUM(AS REQUIRED)
    $7.37 $4.69
    1
    Add To Cart
  • 8919354
    CONDUIT, ELECTRODE (.350 INSIDE DIAMETER)
    $53.12 $33.77
    1
    Add To Cart
  • 9440033
    BOLT, HEX FLANGED HEAD (1/4-20X5/8) 280M PHOSPHATE ORGANIC
    $5.42 $3.45
    1
    Add To Cart
  • 9440033
    BOLT, FLGD HEAD (1/4X20X9/16)(14 REQ)
    $5.42 $3.45
    1
    Add To Cart
  • 11609970
    CLAMP, WORM GEAR (.30 TO .87) SST
    $4.55 $2.89
    15
    Add To Cart
  • Buick 9442184
    9442184
    BOLT, HEXAGON (5/16-18X7/8) 300M PHOSPHATE
    $6.91 $4.38
    5
    Add To Cart
  • Buick 9442184
    9442184
    BOLT, HEXAGON,5/16-18X.88,3/4 THREAD,300M,PHOSPHATE HEAVY ZINC
    $6.91 $4.38
    5
    Add To Cart
  • 3727207
    BOLT, HEXAGON (7/16-20X.70) STEEL
    $11.18 $7.11
    40
    Add To Cart
  • 11609754
    CLAMP, WORM GEAR (52.4 TO 74) SST
    • Replaced By: 12338017
    $8.41 $5.62
    5
    Add To Cart
  • 12541500
    TUBING, SERVICE 5/16" COILED STEEL(25FT)(AS REQUIRED)
    $53.13 $33.77
    1
    Add To Cart
  • 3951644
    BOLT, HEXAGON (5/16-18X1 1/8) 280M PHOSPHATE (CARBURETOR MOUNT SHORT)
    $6.02 $3.82
    5
    Add To Cart
  • 11501869
    WASHER, EXTERNAL TOOTHED LOCK,M8,15 O.D.,.85THK,STEEL,ZINC(AS REQUIRED)
    $6.24 $3.48
    1
    Add To Cart
  • 11609779
    WASHER, FLAT (5/16X5/8) ZINC COATED (DIPPED OR PLATED)
    $7.39 $4.69
    1
    Add To Cart
  • 11609779
    WASHER, FLAT (5/16X5/8) ZINC COATED (DIPPED OR PLATED) HARD
    $7.39 $4.69
    1
    Add To Cart
  • 12338130
    NUT, HEXAGON (5/16-18) 286M PHOSPHATE ORGANIC
    $5.21 $3.15
    10
    Add To Cart
  • 12338130
    NUT, HEXAGON (5/16X18 17/64 THICK)
    $5.21 $3.15
    10
    Add To Cart
  • 1453658
    PIN, DOWEL (5/8X1 3/16) PLAIN
    • Replaced By: 12720455
    $7.40 $4.69
    1
    Add To Cart
  • 1470030
    CLAMP, WORM TYPE(11/16" TO 1 5/16")(AS REQUIRED)
    • Replaced By: 11610236
    $7.38 $4.69
    1
    Add To Cart
  • 1470030
    CLAMP, WORM GEAR (15.7 TO 31.8) SST (1986-90)
    • Replaced By: 11610236
    $7.38 $4.69
    1
    Add To Cart
  • Buick 179822
    179822
    BOLT, HEXAGON (5/16-18X1 1/2) 280M ZINC COATED (DIPPED OR PLATED)
    $15.41 $9.79
    1
    Add To Cart
  • Buick 19370570
    19370570
    NUT, HEXAGON (5/16-24) 286M ZINC
    $7.19 $4.57
    1
    Add To Cart
  • Buick 24500867
    24500867
    PLUG, CUP BLOCK HOLES(1.5"DIAMETER)(AS REQUIRED)(0.034)
    $3.87 $2.46
    10
    Add To Cart
  • 24501365
    BOLT, HEXAGON,5/16-18X5/8,ZINC(AS REQUIRED)
    $12.24 $7.77
    1
    Add To Cart
  • 25536321
    PIN, DOWEL 1/4"X 1/2"(AS REQUIRED)
    $7.39 $4.69
    1
    Add To Cart
  • Buick 585927
    585927
    PIN, DOWEL (5/16X9/16) STEEL
    $3.27 $1.75
    1
    Add To Cart
  • Buick 9424320
    9424320
    BOLT, HEXAGON 3/8-16X1.00 300M
    $22.70 $13.73
    1
    Add To Cart
  • 9424338
    BOLT, HEXAGON (3/8-16X3/4) 280M ZINC
    $5.98 $3.80
    1
    Add To Cart
  • 9424877
    BOLT, HEXAGON (5/16-18X3/4) 300M PHOSPHATE
    $3.43 $2.20
    5
    Add To Cart
  • Buick 9439636
    9439636
    BOLT, HEXAGON (3/8-16X1 1/2) 300M CADMIUM
    $20.98 $13.16
    1
    Add To Cart
  • 9439905
    BOLT, HEXAGON (3/8-16X3/4) 300M PHOSPHATE ZINC ORGANIC
    $7.31 $4.64
    1
    Add To Cart
  • Buick 9440169
    9440169
    BOLT, HEXAGON (3/8-16X7/8)
    $7.20 $4.57
    1
    Add To Cart
  • 9440224
    BOLT, HEX FLANGED HEAD (5/16-18X.62) 280M PHOSPHATE ORGANIC
    $25.40 $12.60
    1
    Add To Cart
  • Buick 9442340
    9442340
    BOLT, INTAKE MANIFOLD TO CYL HEAD(HEXAGON HEAD 3/8-16X2 300M PC)
    $5.22
    1
    Add To Cart
  • 12548430
    TUBING, BRAKE,1/4" X 16 FT ROLL,STEEL(AS REQUIRED)
    $67.04 $37.37
  • 9420462
    BOLT, HEXAGON (3/8-16X1 1/4) 300M PLATE STEEL (7.039)
  • 9441578
    BOLT, HEXAGON,5/16-18X1/2,HEADER POINT,PLATE STEEL(AS REQUIRED)
  • Buick 9442008
    9442008
    BOLT, HEXAGON HEAD (1/4-20X.50) 280M CADMIUM ZINC
  • Buick 9442339
    9442339
    BOLT, HEXAGON (3/8-16X1.12) 280M PHOSPHATE ELECTRO ORGANIC (1986-89)
  • Buick 9442339
    9442339
    BOLT, HEXAGON (3/8-16X1.12) 280M PHOSPHATE ELECTRO ORGANIC
  • Buick 9442339
    9442339
    BOLT, HEXAGON (3/8-16X1.12) 280M PHOSPHATE ELECTRO ORGANIC (1990)
Genuine GM Parts, the Right Choice
GMPartsGiant.com offers the wholesale prices for genuine 1985 Buick Riviera parts. Parts like Engine Assembly are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.8L, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel. Model Code: CONVERTIBLE COUPE, RIVIERA, T TYPE.