1973 Cadillac Coupe deVille

1973 Cadillac Coupe deVille

For 1973, there were five models:

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

EngineV8 472cc (7.7L)V8 500cc (8.2L)
Crankcase4 qt5 qt
Crankcase with new filter5 or 6 qt6 qt
AutomaticTransmission after draining8 pt11.9 pt
Drive Axle5 pt4 pt
Fuel tank27.5 gal(US)27.5 gal(US)
Cooling with heater21.3 qt21.3 qt
Cooling with A/C21.3 qt21.3 qt
Heavy duty Cooling21.8 qt21.8 qt

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N CodeRS
Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Fuel delivery4 bbl4 bbl
ManufacturerCadillacCadillac
Original Spark plugR46NR46N
Gap0.035 in.0.035 in
Distributor Point Dwell30°30°
Distributor Point Gap0.016"0.016"
Ignition timing (BTDC)
Intake valve opens (BTDC)3434
Fuel pump pressure5¼ - 6½ psi5¼ - 6½ psi
Idle speed600/400 rpm600/400 rpm

ALTERNATOR AND REGULATOR SPECS

Part #1100940110093711010151117144
Field current @ 12 V4.0 - 4.54.0 - 4.54.0 - 4.54.0 - 4.5
Output42 amps63 amps80 amps145 amps
Regulator Field-Relay: Air GapSolid StateSolid StateSolid StateSolid State
Regulator Field-Relay: Point Gap
Regulator Field-Relay: Volts to Close
Regulator Air Gap
Regulator Point Gap
Regulator Volts @ 75°13.8 - 14.813.5 - 14.413.8 - 14.813.5 - 14.4

BATTERY AND STARTER SPECS

EngineV8-472cc (7.7L)V8-500cc (8.2L)
Battery Ampere Hour Capacity7474
Battery Volts1212
Battery Terminal GroundedNeg.Neg.
Starter, Lock Test, AmpsNot RecommendedNot Recommended
Starter, Lock Test, Volts
Starter, Lock Test, Torque
Starter, No-Lead Test, Amps65 - 9565 - 95
Starter, No-Lead Test, Volts99
Starter, No-Lead Test, RPM7000 - 105007000 - 10500
Starter, Brush Spring Tension35 oz. min.35 oz. min.

GENERAL ENGINE SPECS

Engine V.I.N CodeRS
Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
ManufacturerCadillacCadillac
Fuel delivery4 bbl4 bbl
Horsepower220@4000235@3800
Torque365@2400385@2400
Bore x Stoke4.300 x 4.0604.300 x 4.304
Compression Ratio8.5:18.5:1
Oil pressure35 psi35 psi

CRANKSHAFT SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Main Brg Journal Dia.3.2503.250
Main Brg Oil Clearance0.0003 - 0.00260.0003 - 0.0026
Shaft End-play0.002 - 0.0120.002 - 0.012
Thrust on No.33

CONNECTING ROD SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Journal Dia.2.50002.5000
Oil Clearance0.0005 - 0.00280.0005 - 0.0028
Side Clearance0.008 - 0.0160.008 - 0.016

PISTON AND RING SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Piston-Bore Clearance0.0006 - 0.00100.0006 - 0.0010
Ring Side Clearance: Top Compression0.0017 - 0.00400.0017 - 0.0040
Ring Side Clearance: Bottom Compression0.0017 - 0.00400.0017 - 0.0040
Ring Side Clearance: Oil ControlNone (side sealing)None (side sealing)
Ring Gap: Top Compression0.013 - 0.0250.013 - 0.025
Ring Gap: Bottom Compression0.013 - 0.0250.013 - 0.025
Ring Gap: Oil Control0.015 - 0.0550.015 - 0.055

VALVE SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Seat Angle45°44°
Face Angle45°44°
Spring Test Pressure160 lb @ 1.50 in.168 lb @ 1.50 in.
Spring Installed Height11516 in. (1.671875")11516 in. (1.9375")
Stem-to-Guide Clearance: Intake0.0010 - 0.00270.0010 - 0.0027
Stem-to-Guide Clearance: Exhaust0.0012 - 0.00270.0012 - 0.0027
Stem Diameter: Intake0.34200.3418
Stem Diameter: Exhaust0.34180.3416

TORQUE SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Cyl. Head Bolts115 ft.lb115 ft. lb
Rod Brg Bolts40 ft.lb40 ft. lb
Main Brg Bolts90 ft.lb90 ft. lb
Crankshaft Damper or Pulley BoltPress fitPress fit
Flywheel to Crankshaft Bolts75 ft.lb75 ft. lb
Intake Manifold30 ft.lb30 ft. lb
Exhaust Manifold35 ft.lb35 ft. lb

CARBURETOR SPECS

Carb ID7046881 (4MV)7047331 (4MV)7047332 (4MV)
Float Level19/64 in14 in.23/64 in
Air Valve Spring1/2 turn1/2 turn1/2 turn
Pump Rod1132 in.1132 in.1132 in.
Primary Vacuum Break0.205 in0.200 in0.205 in
Choke Rod0.090 in0.090 in0.090 in
Choke Unloader0.015 in0.015 in0.015 in
Fast Idle Speed1925 rpm1925 rpm1925 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 38°N - 38°P 38°P - 38°N
Camber LH wheel Pref.
Camber RH wheel Range 38°N - 38°P 1/8°P - 5/8°N
Camber RH wheel Pref. ¼°N
Toe-In 0" 18 in. - 14 in.
Steering Axis Inclination11°

HISTORICAL NOTES

1973 Cadillac Notes

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)