Cadillac Moels & History 1983

Cadillac for 1983 heralded a new line of electronic fuel-injected engines, eliminating the carburetor. The EFI lineup even included the 2.0-liter four that powered Cimarrons. Once again, the HT-4100 V-8 was Cadillac’s standard engine (except on Cimarrons and limousines), now with 10 more horsepower. Automatic four-speed overdrive transmission was standard as well. The 5.7-liter diesel was available again.

A new Freedom II battery gave better cold-cranking performance. The curious but undependable variable-displacement V8-6-4 engine was consigned only to limousine applications.

Added to the Eldorado and Seville option lists was a Delco-GM/Bose Symphony Sound System with four amplifiers and speakers in separate enclosures, billed as the “industry’s most advanced stereo.” Sound was automatically balanced for all passengers, reflecting off the windows and interior. Acoustics were based on window location and shape, upholstery, carpeting, and position of driver and passengers. The system included an AM/FM stereo radio and integral cassette player with Dolby tape noise reduction and full-time loudness control. Tested with an “acoustically-sensitive” robot, the system was also offered on Buick Riviera and Olds Toronado.

V.I.N. DATA

  • All Cadillacs again had a 17-symbol Vehicle Identification Number (VIN), stamped on a metal tag attached to the upper left surface of the cowl, visible through the windshield.
  • The number begins with a “1” to indicate the manufacturing country (U.S.A.), followed by a “G” for General Motors and a “6” for Cadillac Division.
  • The next letter indicates restraint system:
    • “A” manual (standard)
    • “B” automatic
  • Symbol five is a letter denoting car line and series:
    • “S” Seville
    • “B” Fleetwood Brougham
    • “D” DeVille
    • “F” Fleetwood limousine
    • “Z” commercial chassis
    • “L” Eldorado
    • “G” Cimarron
  • Digits six and seven indicate body type:
    • “47” 2-door coupe
    • “69” 4-door four-window sedan
    • “23” six-window, eight-passenger sedan w/auxiliary seat
    • “33” six-window formal limousine w/aux. seat and center partition
    • “90” commercial chassis (no body)
    • “57” Eldorado coupe
  • Next comes an engine code:
    • ‘P’ L4-121 TBI
    • ‘8’ V8-249 DFI
    • ‘9’ V8-6-4 368 DFI
    • ‘N’ V8-350 diesel
    • ‘6’ V8-368 4-bbl.
  • The next symbol is a check digit
  • Symbol ten indicates model year (“D” 1983)
  • Symbol eleven denotes assembly plant:
    • “9” Detroit
    • “E” Linden, New Jersey (Seville/Eldorado)
    • “C” for South Gate, California (Cimarron)
  • The final six-digit production sequence number began with 100001 for Detroit-built models: 600001 (Eldorado) or 680001 (Seville) for those built in New Jersey
  • An identification number for the V-6 engine was on the left rear of the block; on the V8-350, a code label was on top of the left valve cover and a unit number label atop the right valve cover.
  • Other engines had a unit number on the block behind the left cylinder head, and a VIN derivative on the block behind the intake manifold.
  • A body number plate on the upper horizontal surface of the shroud (except Seville, on front vertical shroud surface) showed model year, build date code, car division, series, style, body assembly plant, body number, trim combination, paint code, modular seat code, and roof option.

SPECIFICATIONS

FLUID CAPACITIES

Engine V8 250cc (4.1L) V8 350cc (5.7L) Diesel V8 368cc (6.0L)
Crankcase 4 qt 6 qt 4 qt
Crankcase with new filter 5 qt 7 5 qt
AutomaticTransmission after draining 10 pt 10 pt 8 pt
Drive Axle 4.25 or 3.25 pt 4.25 or 3.25 pt 4.25 pt
Fuel tank 24 or 21 gal(US) 26 or 21 gal(US) 25 gal(US)
Cooling with heater 11 qt 23 or 18 qt 21.4 qt
Cooling with A/C 11 qt 23 qt 21.4 qt
Heavy duty Cooling NA NA NA

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N Code 8 6 9
Engine type V8-250cc (4.1L) V8-368cc(6.0L) V8-368cc(6.0L)
Fuel delivery DFI 4 bbl DFI
Manufacturer Cadillac Cadillac Cadillac
Original Spark plug R43NTS6 R45NSX R45NAX
Gap 0.060 in. 0.060 in 0.060 in
Distributor Electronic Electronic Electronic
Ignition timing (BTDC) See underhood sticker 18° See underhood sticker
Intake valve opens (BTDC) 37 11 11
Fuel pump pressure 12 – 14 5½ to 6½ psi 12 – 14 min.
Idle speed See underhood sticker 575 rpm See underhood sticker

ALTERNATOR AND REGULATOR SPECS

Part # 1102380 1101023 1101033 1117152
Field current @ 12 V 4 – 4.5 4 – 4.5 4 – 4.5 4 – 4.5
Output 63 amps 80 amps 80 amps 145 amps
Regulator Solid state Solid state Solid state Solid state
Volts @ 75° 13.8 – 14.8 13.8 – 14.8 13.8 – 14.8 13.8 – 14.8

BATTERY AND STARTER SPECS

Engine V8-250cc (4.1L) V8-350cc (5.7L) V8-368cc (6.0L) V8-350cc (5.7L)Diesel
Battery Ampere Hour Capacity 540 amps cold cranking power @ 0°F
Battery Volts 12 12 12 12
Battery Terminal Grounded Neg. Neg. Neg. Neg.
Starter, Lock Test, Amps Not Recommended
Starter, Lock Test, Volts
Starter, Lock Test, Torque
Starter, No-Lead Test, Amps 65 – 95 65 – 95 65 – 95 40 – 140
Starter, No-Lead Test, Volts 9 9 9 9
Starter, No-Lead Test, RPM 7000 – 10500 7000 – 10500 7000 – 10500 8000 – 13000
Starter, Brush Spring Tension 35 oz. min. 35 oz. min. 35 oz. min. 35 oz. min.

GENERAL ENGINE SPECS

Engine V.I.N Code 8 N 6 9
Engine type V8-250cc(4.1L) V8-350cc(5.7L) V8-368cc(6.0L) V8-368cc(6.0L)
Manufacturer Cadillac Oldsmobile Cadillac Cadillac
Fuel delivery DFI Diesel 4 bbl DFI
Horsepower [email protected] [email protected] [email protected] [email protected]
Torque [email protected] [email protected] [email protected] [email protected]
Bore x Stoke 3.465 x 3.400 4.057 x 3.385 3.800 x 4.060 3.800 x 4.060
Compression Ratio 8.50:1 22.5:1 8.20:1 8.20:1
Oil pressure 30 psi 40 psi 35 psi 35 psi

ALTERNATOR AND REGULATOR SPECS

Part # 1102921 1101040 1101046 1101050 1101091
Field current @ 12 V 4 – 4.5 4 – 4.5 4 – 4.5 4 – 4.5 4 – 4.5
Output 63 amps 70 80 100 100
Regulator Solid state Solid state Solid state Solid state Solid state
Volts @ 75° 13.8 – 14.8 13.8 – 14.8 13.8 – 14.8 13.8 – 14.8 13.8 – 14.8

CRANKSHAFT SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L)
Main Brg Journal Dia. 2.640 2.9993 – 3.0003 3.250
Main Brg Oil Clearance 0.0004 – 0.0027 0.0005 – 0.0021(No. 5: 0.0015 – 0.0031) 0.0001 – 0.0026
Shaft End-play 0.001 – 0.007 0.004 – 0.014 0.002 – 0.012
Thrust on No. 3 3 3

CONNECTING ROD SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L)
Journal Dia. 2.052 – 2.054 2.1238 – 2.1248 2.5000
Oil Clearance 0.0005 – 0.0028 0.0005 – 0.0026 0.0005 – 0.0026
Side Clearance 0.008 – 0.020 0.006 – 0.020 0.008 – 0.020

PISTON AND RING SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L)
Piston-Bore Clearance 0.0008 0.0035 – 0.0045 0.0006 – 0.0014
Ring Side Clearance: Top Compression 0.0016 – 0.0037 0.005 – 0.007 0.0017 – 0.0040
Ring Side Clearance: Bottom Compression 0.0016 – 0.0037 0.003 – 0.005 0.0017 – 0.0040
Ring Side Clearance: Oil Control None (side sealing) 0.001 – 0.005 None (side sealing)
Ring Gap: Top Compression 0.015 – 0.025 0.019 – 0.027 0.013 – 0.023
Ring Gap: Bottom Compression 0.015 – 0.025 0.013 – 0.021 0.013 – 0.023
Ring Gap: Oil Control 0.010 – 0.050 0.015 – 0.055 0.015 – 0.055

VALVE SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L)
Seat Angle 45° 45°(intake); 31° (exhaust) 45°
Face Angle 44° 44°(intake); 30° (exhaust) 44°
Spring Test Pressure 167 lb @ 1.34″ 210 lb @ 1.22″ 160 lb @ 1.50″
Spring Installed Height 1-43/64″ 1-43/64″ 1-15/32″
Stem-to-Guide Clearance: Intake 0.0010 – 0.0030 0.0010 – 0.0027 0.0010 – 0.0027
Stem-to-Guide Clearance: Exhaust 0.0010 – 0.0030 0.0015 – 0.0032 0.0010 – 0.0027
Stem Diameter: Intake 0.3413 – 0.3420 0.3425 – 0.3432 0.3417
Stem Diameter: Exhaust 0.3411 – 0.3418 0.3420 – 0.3427 0.3417

TORQUE SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L)
Cyl. Head Bolts 90 ft. lb 130 ft. lb 95 ft. lb
Rod Brg Bolts 20 ft. lb 42 ft. lb 40 ft. lb
Main Brg Bolts 85 ft. lb 120 ft. lb 90 ft. lb
Crankshaft Damper or Pulley Bolt Press fit 200 – 310 ft. lb Press fit
Flywheel to Crankshaft Bolts 20 ft. lb 60 ft. lb 75 ft. lb
Intake Manifold 22 ft. lb 40 ft. lb 30 ft. lb
Exhaust Manifold 20 ft. lb 25 ft. lb long bolts: 35 ft. lb;short bolts: 12 ft. lb

CARBURETOR SPECS

Carb ID 17082266 (M4ME) 17082267 (M4ME)
Float Level 3/8 in 3/8 in
Air Valve Spring 5/8 turn 5/8 turn
Pump Rod fixed fixed
Primary Vacuum Break 0.149 in 0.149 in
Secondary Vacuum Break 0.149 in 0.149 in
Choke Rod 0.071 in 0.071 in
Choke Unloader 0.195 in 0.195 in
Fast Idle Speed See underhood decal

WHEEL ALIGNMENT SPECS

Feature Eldorado Full size Seville
Caster Range 2°P – 3°P 2½°P – 3½°P 2°P – 3°P
Caster Pref. 2½°P 3°P 2½°P
Camber LH wheel Range ½°N to ½°P 3/32°P to 57/64°P ½°N to ½°P
Camber LH wheel Pref. ½°
Camber RH wheel Range ½°N to ½°P 3/32°P to 57/64°P ½°N to ½°P
Camber RH wheel Pref. ½°
Toe-In 1/8 in to 1/8 out 18 in. 1/8 in to 1/8 out
Steering Axis Inclination 11° 10-19/32° 11°

HISTORICAL NOTES

1983 Cadillac Notes

  • Introduced: September 23, 1982.
  • Robert D. Burger was general manager
  • Robert J. Templin was chief engineer
  • Wayne Kady was chief designer (Cadillac Studio)
  • L. B. Pryor was general sales manager
  • Model year production: 292,714, which came to 5.1 percent of the industry total.
  • That total included 5,223 diesels.
  • Calendar year production: 309,811.
  • Calendar year sales by U.S. dealers: 300,337.
  • Model year sales by U.S. dealers: 290,138 for a 4.5 percent market share.
  • Sales rose by over 22 percent for the 1983 model year, suggesting that Cadillac’s appeal to luxury-minded buyers hadn’t waned.
  • Before taking over the Chevrolet division, Cadillac general manager Robert D. Burger told reporters that the company was “confident about the future of the luxury car business” since research by 1982 suggested a “long-term fundamental shift toward luxury cars that hold their value.”
  • On the other hand, research also showed that Cadillac buyers were considerably older (median age about 60) than car buyers in general — a fact that could become a problem in future years.
  • The popularity of the HT-4100 4.1 liter V-8 brought speculation that a transverse-mounted version would be planned for the 1984 Eldorado.
  • That car’s engine compartment would have to be widened, however, to accommodate the V-8.
  • So the switch occurred only when Eldorado got a new body for 1986.
  • Rear-drive Cadillacs were the longest cars on the market, measuring 121 inches in wheelbase.
  • Buyers still liked them, so they expected to remain in the lineup for a while longer.
  • Cadillac production figures
Cimarron19,294 (increased 10,928)
Fleetwood/de Ville series174,674 (increased 37,074)
Eldorado67,416 (increased 15,398)
Seville30,430 (increased 10,432)
Series 751,000 (decreased 450)

1983 Automotive Notes

  • GM news:
  • Ford news:
  • Chrysler news:
  • AMC news:
  • Other makes news:
  • Top American Automobile Corporations for 1983


1. General Motors3,511,491
2. Ford1,243,887
3. Chrysler737,835
4. AMC168,726
5. Others100


  • Top model year production for 1983
Chevrolet1,175,200
Oldsmobile916,583
Buick808,416
Skyhawk63,152
Skylark104,647
Century127,926
Regal228,239
LeSabre136,052
Electra98,166
Riviera50,234
Ford783,225
Mercury359,594
Pontiac318,478
Dodge304,464
Cadillac292,814
Cimarron19,294
Seville30,430
DeVille130,723
Eldorado67,416
Fleetwood Brougham43,500
Fleetwood Limousine1,451
Plymouth273,489
AMC168,726
Alliance142,205
Spirit3,491
Concord5,300
Eagle 502,259
Eagle 3015,471
Chrysler159,882
Lincoln101,068
Avanti100