Cadillac Moels & History 1984

This was more a year of waiting than one of major changes. All Cadillac engines were now fuel injected. All but Cimarron and Fleetwood limousines carried the HT-4100 cu. in. (4.1 liter V-8 with aluminum alloy block and digital fuel injection. This year, that 249 cu. in. engine gained a new exhaust system and catalytic converter, plus revised calibration settings, to meet high-altitude emissions standards.

New features on DeVille, Fleetwood Brougham and limos included a goldtone horizontally-winged Cadillac crest ornament on front parking and turn signal lenses; new car-colored bodyside moldings; new goldtone vertically-winged Cadillac crest and goldtone accents on taillamp lenses; and new standard electronic level control. Diesel engine identification plaques were now on the left rear of the decklid. Faster-warming glow plugs went into the optional 5.7 liter diesel V-8, for improved cold-startups. A modified optional theft-deterrent system could detect any object on the driver’s seat that weighed 40 pounds or more.

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.
  • Some of the coding changed this year.
  • The first character is a “1” to indicate the manufacturing country (U.S.A.)
  • Next is a “G” for General Motors
  • The third character is a “6” for Cadillac Division.
  • The next character indicates restraint system: “A” manual; “B” automatic.
  • Symbol five denotes car line and series:
    • “S” Seville;
    • “M” DeVille;
    • “W” Fleetwood Brougham;
    • “F” Fleetwood limousine;
    • “L” Eldorado.
  • Characters six and seven indicate body type:
    • “47” 2-dr. coupe;
    • “69” 4-dr. sedan;
    • “23” eight-passenger limousine;
    • “33” formal limousine with center partition;
    • “57” Eldorado coupe;
    • “67” 2-dr. convertible coupe.
  • Next comes the engine code:
    • “P” L4-121 TBI;
    • “8” V8-250 FI;
    • “N” V8-350 diesel;
    • “9” V8-6-4 368 FI.
  • The ninth character is a check digit.
  • Character ten indicates model year (“E” 1984).
  • Character eleven denotes the assembly plant.
  • The last six characters is a six-digit production sequence number.
  • As before, engines carried an identifying number and bodies held a number plate.

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 # 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 amps 80 amps 100 amps 100 amps
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

BATTERY AND STARTER SPECS

Engine V8-250cc (4.1L) 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
Battery Terminal Grounded 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 40 – 140
Starter, No-Lead Test, Volts 9 9 9
Starter, No-Lead Test, RPM 7000 – 10500 7000 – 10500 8000 – 13000
Starter, Brush Spring Tension 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) Diesel 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 3.307 4.057 x 3.385 3.800 x 4.060 3.800 x 4.060
Compression Ratio 8.5:1 (9:1 with Swirl Cylinder Heads) 22.7:1 8.20:1 8.20:1
Oil pressure 30 psi 40 psi 35 psi 35 psi

CRANKSHAFT SPECS

Engine type V8-250cc(4.1L) V8-350cc(5.7L) Diesel V8-368cc(6.0L) V8-307cc(5.0L)
Main Brg Journal Dia. 2.640 2.9993 – 3.0003 3.250 2.4988 – 2.4998 (No. 2, 3, 4, 5: 2.4985 – 2.4995)
Main Brg Oil Clearance 0.0004 – 0.0027 0.0005 – 0.0021 (No. 5: 0.0015 – 0.0031) 0.0001 – 0.0026 0.0005 – 0.0021 (No. 5: 0.0015 – 0.0031)
Shaft End-play 0.001 – 0.007 0.004 – 0.014 0.002 – 0.012 0.0035 – 0.0135
Thrust on No. 3 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

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

1984 Cadillac Notes

  • Introduced: September 22, 1983.
  • Robert D. Burger was general manager until January
  • John O. Grettenberger became general manager in January
  • Robert J. Templin was chief engineer for part of the year
  • Edward H. Mertz became chief engineer
  • Wayne Kady was chief designer (Cadillac Studio)
  • L. B. Pryor was general sales manager
  • Model year production: 300.300 (not including early ’85 DeVille/Fleetwoods).
  • The total includes 2,465 diesels.
  • Calendar year production: 328,534.
  • Calendar year sales by U.S. dealers: 320,017 for a 4.0 percent market share.
  • Model year sales by U.S. dealers: 327,587 (including 46,356 early ’85 front-drives).
  • Sales rose 13 percent for the model year, but Cadillac’s market share declined.
  • (Figures are a bit distorted because both front-drive and rear-drive DeVille/Fleetwood models were sold at the same time.)
  • On the other hand, all the GM divisions experienced a drop in market share.
  • Rising demand, though, kept plants working overtime during 1984.
  • Cimarron continued as Cadillac’s weakest seller, largely because it offered little more than the related J-car Chevrolet Cavalier gave for far fewer dollars.
  • Best performers in terms of increased sales were the big DeVille and Fleetwood Brougham.
  • Research had shown, however, that over three-fourths of Cimarron buyers had never bought a Cadillac before; and that many of them had previously owned an import.
  • Late in 1983, a modern new plant at Orion Township in Michigan had begun production of the new front-drive DeVille, to be introduced for 1985 after early production delays.
  • Also late in 1983, Cadillac became part of the Buick-Cadillac-Oldsmobile group.
  • In January 1984, John O. Grettenberger became Cadillac’s new chief.
  • Cadillac had offered the last American convertible in 1976, but wasn’t the first to return with a ragtop in the ’80s.
  • Already on the market were Buick Riviera, Chevrolet Cavalier, Pontiac Sunbird, Chrysler LeBaron, Dodge 600, and Ford Mustang.
  • Cadillac’s version was, of course, the most costly of the lot for ’84.
  • The convertible was actually a conversion done by ASC Corporation in Lansing, Michigan, after the car was assembled in New Jersey.
  • The work included reinforcing inner rockers, radiator support cross rods, and many body braces.
  • Front and rear anti-roll bars and tougher suspension components were added along with the vinyl convertible top.
  • All told, the convertible weighed 179 pounds more than the coupe from which it evolved.
  • Cadillac production figures
Cimarron21,898 (increased 2,604)
Fleetwood/de Ville series191,510 (increased 16,836)
Eldorado77,806 (increased 10,390)
Seville39,997 (increased 9,567)
Series 751,839 (increased 839)

1984 Automotive Notes

  • GM news:
  • Ford news:
  • Chrysler news:
  • AMC news:
  • Other makes news:
  • Top American Automobile Corporations for 1984


1. General Motors4…………..,682,477
2. Ford1,………………813,523
3. Chrysler1………………….,176,144
4. AMC208…………..,624
5. Others287


  • Top model year production for 1984
Chevrolet1,………………..655,151
Ford1,180,……………………….708
Oldsmobile1,……………………..144,225
Buick987………………….,980
Skyhawk145,………………393
Skylark111……………………..211
Century223………………..,335
Regal224……………………,754
LeSabre154,……………………712
Electra74,………………..189
Riviera57,……………863
Pontiac594,…………………..821
Mercury475,……………………381
Dodge442,…………………527
Chrysler375,………………………853
Plymouth357…………………………764
Cadillac300,……………………………300
Cimarron21,………………………898
Seville39,…………………………997
DeVille114,…………………….610
Eldorado77,……………………………806
Fleetwood Brougham44,………………150
Fleetwood Limousine1,……………..839
AMC208,…………………………624
Encore87,……………………………….609
Alliance91,…………………………….664
Eagle 3016,……………………….190
Lincoln157,……………………….434
Avanti287