1973 Cadillac history

HISTORICAL
ID
LITERATURE
SPECIFICATIONS

1973 Cadillac Coupe deVille

1973 Cadillac Coupe deVille

For 1973, there were five models:

Calais: two-door hardtop coupe and four-door hardtop sedan
DeVille: two-door coupe and four-door sedan
Fleetwood Sixty-Special Brougham: four-door sedan
Fleetwood Seventy-five: four-door sedan, four-door limousine, and commercial chassis used in hearses and ambulances, etc.
Fleetwood Eldorado: two-door hardtop coupe and two-door convertible

I. D. DATA

1973 Cadillac Sedan deVille

1973 Cadillac Sedan deVille

The serial number system and locations were the same as the previous year with the sixth symbol changed to "3" to indicate model year.

Calais were numbered 6C(__)R3Q 100001 to 350000

DeVilles: 6D(__)R3Q 100001 to 350000 or 6D4(__)R3E 3500001 to 400000

Eldorados: 6L(__)S3Q 400001 to 450000

Broughams: 6B69R30 100001 to 350000

Seventy-Fives 6F(__)R3Q 100001 to 350000.

The new Body Style Number codes were used on both serial number tags and vehicle data plates.

SPECIFICATIONS

FLUID CAPACITIES

Engine	V8 472cc (7.7L)	V8 500cc (8.2L)
Crankcase	4 qt	5 qt
Crankcase with new filter	5 or 6 qt	6 qt
AutomaticTransmission after draining	8 pt	11.9 pt
Drive Axle	5 pt	4 pt
Fuel tank	27.5 gal(US)	27.5 gal(US)
Cooling with heater	21.3 qt	21.3 qt
Cooling with A/C	21.3 qt	21.3 qt
Heavy duty Cooling	21.8 qt	21.8 qt

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N Code	R	S
Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Fuel delivery	4 bbl	4 bbl
Manufacturer	Cadillac	Cadillac
Original Spark plug	R46N	R46N
Gap	0.035 in.	0.035 in
Distributor Point Dwell	30°	30°
Distributor Point Gap	0.016"	0.016"
Ignition timing (BTDC)	8°	8°
Intake valve opens (BTDC)	34	34
Fuel pump pressure	5¼ - 6½ psi	5¼ - 6½ psi
Idle speed	600/400 rpm	600/400 rpm

ALTERNATOR AND REGULATOR SPECS

Part #	1100940	1100937	1101015	1117144
Field current @ 12 V	4.0 - 4.5	4.0 - 4.5	4.0 - 4.5	4.0 - 4.5
Output	42 amps	63 amps	80 amps	145 amps
Regulator Field-Relay: Air Gap	Solid State	Solid State	Solid State	Solid State
Regulator Field-Relay: Point Gap
Regulator Field-Relay: Volts to Close
Regulator Air Gap
Regulator Point Gap
Regulator Volts @ 75°	13.8 - 14.8	13.5 - 14.4	13.8 - 14.8	13.5 - 14.4

BATTERY AND STARTER SPECS

Engine	V8-472cc (7.7L)	V8-500cc (8.2L)
Battery Ampere Hour Capacity	74	74
Battery Volts	12	12
Battery Terminal Grounded	Neg.	Neg.
Starter, Lock Test, Amps	Not Recommended	Not Recommended
Starter, Lock Test, Volts
Starter, Lock Test, Torque
Starter, No-Lead Test, Amps	65 - 95	65 - 95
Starter, No-Lead Test, Volts	9	9
Starter, No-Lead Test, RPM	7000 - 10500	7000 - 10500
Starter, Brush Spring Tension	35 oz. min.	35 oz. min.

GENERAL ENGINE SPECS

Engine V.I.N Code	R	S
Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Manufacturer	Cadillac	Cadillac
Fuel delivery	4 bbl	4 bbl
Horsepower	220@4000	235@3800
Torque	365@2400	385@2400
Bore x Stoke	4.300 x 4.060	4.300 x 4.304
Compression Ratio	8.5:1	8.5:1
Oil pressure	35 psi	35 psi

CRANKSHAFT SPECS

Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Main Brg Journal Dia.	3.250	3.250
Main Brg Oil Clearance	0.0003 - 0.0026	0.0003 - 0.0026
Shaft End-play	0.002 - 0.012	0.002 - 0.012
Thrust on No.	3	3

CONNECTING ROD SPECS

Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Journal Dia.	2.5000	2.5000
Oil Clearance	0.0005 - 0.0028	0.0005 - 0.0028
Side Clearance	0.008 - 0.016	0.008 - 0.016

PISTON AND RING SPECS

Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Piston-Bore Clearance	0.0006 - 0.0010	0.0006 - 0.0010
Ring Side Clearance: Top Compression	0.0017 - 0.0040	0.0017 - 0.0040
Ring Side Clearance: Bottom Compression	0.0017 - 0.0040	0.0017 - 0.0040
Ring Side Clearance: Oil Control	None (side sealing)	None (side sealing)
Ring Gap: Top Compression	0.013 - 0.025	0.013 - 0.025
Ring Gap: Bottom Compression	0.013 - 0.025	0.013 - 0.025
Ring Gap: Oil Control	0.015 - 0.055	0.015 - 0.055

VALVE SPECS

Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Seat Angle	45°	44°
Face Angle	45°	44°
Spring Test Pressure	160 lb @ 1.50 in.	168 lb @ 1.50 in.
Spring Installed Height	1¹⁵⁄₁₆ in. (1.671875")	1¹⁵⁄₁₆ in. (1.9375")
Stem-to-Guide Clearance: Intake	0.0010 - 0.0027	0.0010 - 0.0027
Stem-to-Guide Clearance: Exhaust	0.0012 - 0.0027	0.0012 - 0.0027
Stem Diameter: Intake	0.3420	0.3418
Stem Diameter: Exhaust	0.3418	0.3416

TORQUE SPECS

Engine type	V8-472cc(7.7L)	V8-500cc(8.2L)
Cyl. Head Bolts	115 ft.lb	115 ft. lb
Rod Brg Bolts	40 ft.lb	40 ft. lb
Main Brg Bolts	90 ft.lb	90 ft. lb
Crankshaft Damper or Pulley Bolt	Press fit	Press fit
Flywheel to Crankshaft Bolts	75 ft.lb	75 ft. lb
Intake Manifold	30 ft.lb	30 ft. lb
Exhaust Manifold	35 ft.lb	35 ft. lb

CARBURETOR SPECS

Carb ID	7046881 (4MV)	7047331 (4MV)	7047332 (4MV)
Float Level	19/64 in	¹⁄₄ in.	23/64 in
Air Valve Spring	1/2 turn	1/2 turn	1/2 turn
Pump Rod	¹¹⁄₃₂ in.	¹¹⁄₃₂ in.	¹¹⁄₃₂ in.
Primary Vacuum Break	0.205 in	0.200 in	0.205 in
Choke Rod	0.090 in	0.090 in	0.090 in
Choke Unloader	0.015 in	0.015 in	0.015 in
Fast Idle Speed	1925 rpm	1925 rpm	1925 rpm

WHEEL ALIGNMENT SPECS

Feature	Eldorado	Full size
Caster Range	½°N - 1½°N	1½°N - ½°N
Caster Pref.	1°N	1°N
Camber LH wheel Range	³⁄₈°N - ³⁄₈°P	³⁄₈°P - ³⁄₈°N
Camber LH wheel Pref.	0°	0°
Camber RH wheel Range	³⁄₈°N - ³⁄₈°P	1/8°P - 5/8°N
Camber RH wheel Pref.	0°	¼°N
Toe-In	0"	¹⁄₈ in. - ¹⁄₄ in.
Steering Axis Inclination	11°	6°

HISTORICAL NOTES

1973 Cadillac Notes

Dealer introductions were held September 21, 1972.
Model year production hit a record 304,839 Cadillacs.
The five millionth Cadillac, a blue Sedan DeVille, was built June 27, 1973.
A Cotillion white Eldorado convertible paced the Indy 500 with Jim Rathman driving.
Robert D. Lund became general manager.
Robert J. Templin was chief engineer
Stanley Wilen was chief designer (Cadillac Studio)
F. T. Hopkins was general sales manager
Cadillac production figures

Calais8,073 (increased 298)

Sedan de Ville103,394 (increased 3,863)

Coupe de Ville112,849 (increased 17,569)

Eldorado51,451 (increased 11,377)

Series 6024,800 (increased 4,050)

Series 754,272 (decreased 105)

LITERATURE & LINKS