Cadillac Service Repair Manuals


1976 Cadillac hearse

1976 Cadillac hearse

From the beginning, Cadillac had been nearly synonymous with luxury. People spoke of countless products as "The Cadillac of (whatever)." Through the tailfinned postwar years, Cadillacs had been poshly (sometimes gaudily) appointed, gargantuan in size, powered by some of the biggest V-8s around. Owning one was viewed as a milepost, a demonstration that one had "arrived."

As the 1976 model year began, signs were already appearing that change was imminent; that Cadillac's position might even be in jeopardy one day. For the moment, though, little had changed. Only Lincoln competed in the domestic luxury market, as Chrysler had abandoned its Imperial. Beneath all full-size Cadillac hoods was the biggest V-8 of modern times: a 500 cu. in. behemoth, fully appropriate for the car's enormous length. On the other hand, during the '75 model year a much different kind of Caddy had emerged: the compact Seville, powered by a comparatively tiny, fuel-injected 350 V-8. Unlike the soft American ride and slushy handling typified by big Cadillacs, Seville delivered control more appropriate in a European sedan.

1976 Cadillac

1976 Cadillac

Amid massive publicity, the final front-drive Eldorado convertible came off the line in '76, selling for astounding sums to speculators before leveling off. The bottom-ranked Calais was in its final year, soon to leave only Fleetwood and DeVille to attract full-size coupe/sedan devotees. Luxury-minded customers had plenty to choose from, however, included three special editions:

Yet this was the final season for the mammoth Seventy-Five limousine and nine-passenger sedan. Led by Seville's popularity, Cadillac set records for both sales and production.

1976 Cadillac Seville

1976 Cadillac Seville

Even though 1976 was a year of refinement rather than major body or engineering change at Cadillac, it signaled the end of several eras. GM's last convertible was in its final season. This would be the final year for the low-rung Calais (after a dozen years in the lineup), and for the traditional mammoth Cadillac. Full-size Cadillacs retained the same ample dimensions as in 1975, but the new international-size Seville (introduced in mid-year) was 27 in. shorter, 8 in. narrower and a thousand pounds lighter than a Sedan DeVille. New grilles on all models carried on the traditional Cadillac crosshatch theme, though with a tinier pattern than in 1975 (actually crosshatching within crosshatching). Cornering lamps on Calais, DeVille, Brougham, nine-passenger and limo got new horizontal chrome trim, while taillamps gained a new bold look. Standard wheel discs kept the three-dimensional Cadillac crest on the hub (except Eldorado).

This year beat the all-time record (set in 1973) for sales and production, with 309,139 Cadillacs built. Seville was the shining star of the sales rise. After a brief 1975 model run, production zoomed upward for full-year 1976. At $13.000, Seville was the most costly standard domestic production car built by the Big Four automakers. It also offered a foretaste of what was coming soon as GM downsized all its models. Most Cadillacs, including all Sevilles and Eldorados, were built in Detroit; but 42,570 vehicles emerged from the Linden, New Jersey plant.

1976 Cadillac

1976 Cadillac

Full-size "standard" Cadillacs continued to sell well, defying the market conditions of the mid-1970s. Exactly 14,000 Eldorado convertibles were built in their final season (compared to just 8,950 in 1975). Cadillac promoted them as the "Last of a magnificent breed," The actual "last" American convertible was driven off the line at Cadillac's Clark Avenue plant in Detroit on April 21, 1976, by general manager Edward C. Kennard and manufacturing manager Bud Brawner. Passengers for this major media event included several production workers and Detroit mayor Coleman Young. Just 60 years before, the first Caddy to use the name "convertible" had appeared. For the past five years, Eldorado had been the only luxury American convertible; and for 1976, the sole survivor of the breed.

Reasons cited for the loss of ragtop popularity included

Actually, Cadillac produced 200 identical "final" convertibles, dubbed "Bicentennial Cadillacs" by Mr. Kennard. The one and only last example was kept for the company's collection. All 200 were white with white top, white wheel covers, and white leather upholstery with red piping, dash and carpeting. A dash plaque confirmed the fact that it was one of the last--at least until the ragtop mysteriously re-emerged once again in the early '80s. Speculation sent prices way UP. Their original $11,049 sticker price meant little as some "collectors" quickly began to snap up open Eldos at prices approaching $20.000. But before too long, prices fell almost as swiftly.

Convertibles never really disappeared. Within months various conversion manufacturers were slicing metal roofs off Caddy coupes to create custom convertibles. But the next regular production ragtop would be Chrysler's LeBaron in 1982. In most recent years, over 2,000 Fleetwood commercial chassis had been produced annually, for conversion to hearses and ambulances. Most of those conversions were done by three companies: Superior, Miller-Meteor, or Hess & Eisenhardt. In addition, stretch limousines were built on Cadillac chassis by Moloney (in Illinois) and Wisco (in Michigan), among other specialty firms.

Cadillac's ten models came in four size categories:

Full-size Caddies stretched as long in wheelbase as 133 inches and 233.7 in. overall (limos, 151.5 and 252.2 in. respectively). They still carried a monstrous 500 cu. in. V-8. The smaller Seville, however, actually cost more than bigger Cadillacs. It was powered by a more reasonably sized 350 cu. in. V-8 with electronic fuel injection. (Fuel injection was optional in all models except the Fleetwood Seventy-Five.)

Eight different color accent stripes were available, and seven convertible top colors for the Eldorado. Vinyl roofs now were integral padded Elk Grain material except on Seville and Seventy-Five, which had cross-grain padded vinyl. Interiors were essentially the same as in 1975 with rosewood grain trim, plus bright wreath/crest and script plaques. New trims for full-size models include sporty plaids, plush velours, knits, and distinctive genuine leathers. Calais and DeVille coupes had a new vinyl roof, whose top molding served as continuation of the door "belt" molding.

All full-size Caddies except Eldorado included a Controlled (limited-slip) Differential for extra traction. All had lamp monitors atop each front fender to show status of front and rear lights. All could have optional illuminated entry and theft-deterrent systems. The new Freedom battery never needed water. All but Eldorado offered new-look turbine-vaned and wire wheel covers. A new option locked doors when the lever was shifted to "Drive." Cadillac also offered Track Master, a computerized skid-control system that automatically pumped the back brakes in an emergency situation to shorten stopping distance.

Of special note on the option list was the Air Cushion Restraint System, announced for all models except Eldorado convertible and Fleetwood 75. This was a forerunner of the air bags that received so much publicity a few years later. Another option was the Astroroof, introduced in 1975, with sliding sunshade that permitted use as an electrically-operated sunroof or a transparent closed skylight. Both it and the "ordinary" sunroof panels could give safety along with an open-air feeling, now that the convertible was about to disappear.

Three full-size special editions with new refinements were offered this year: d'Elegance, Talisman and Cabriolet. New options included a pushbutton Weather Band (exclusive to Cadillac) built into the AM/FM stereo signal-seeking radio; loose-pillow style seats for d'Elegance packages; plus power passenger and manual driver seatback recliners for 50/50 front seats.

Of the 15 standard and six optional Firemist body colors, 13 were new this year. The list included:

For extra cost, buyers could order any of six Firemist colors:

Vinyl roofs came in

All Cadillacs had as standard:

For 1976, there were six models:

I. D. NUMBERS

Cadillac's 13-symbol Vehicle Identification Number (VIN) was located on the forward edge of the windshield trim molding, visible through the windshield.

An engine unit number is on the block behind the left cylinder head

A nine-digit VIN derivative that shows model year, plant and sequence number is on the block behind the intake manifold.

Engine number of 350 V-8 is stamped on the front left side of the block, below the head.

A body identification plate on the top right surface of the shroud under the hood, near the cowl), reveals style number, trim number, body number, paint number, and date of assembly (month 01 through 12, week A through E) followed by codes for factory-installed options.

ENGINE

DescriptionStandard EngineEldorado EngineSeville
Engine typeV-8 Overhead valves. Cast iron block
Main bearingsFive
Valve liftersHydraulic
Displacement500 cubic inches
(7.7 litres)
500 cubic inches
(8.2 litres)
350 cubic inches
(5.7 liters)
Bore and stroke4.300 x 4.304 in.
(109 x 103 mm)
4.300 x 4.304 in.
(109 x 109.3 mm)
4.057 x 3.385 in.
(103 x 86 mm)
Compression ratio8.25:18.25:18.0:1
Brake horsepower (net SAE)210 @ 3600 rpm210 @ 3600 rpm180 @ 4400 rpm
Torque380 ft. lbs. @ 2000 rpm380 ft. lbs. @ 2000 rpm275 ft. lbs. @ 2000 rpm
Oil pressure35 psi35 psi35 psi
CarburetorRochester four-barrel Quadrajet Model 4MV-

CHASSIS

ModelWheelbaseOverall lengthHeightWidth
Brougham133 in233.7 in55.3 in.76.4 in.
Calais Coupe130 in230.7 in53.8 in.76.4 in.
Calais Sedan130 in230.7 in54.3 in.76.4 in.
Deville Coupe130 in230.7 in53.8 in.76.4 in.
Deville Sedan130 in230.7 in54.3 in.76.4 in.
Eldorado126.3224.1 in54.2 in.79.8 in.
Seventy-Five Sedan151.5 in252.2 in56.8 in.76.4 in.
Seventy-Five Limo151.5 in252.2 in56.6 in.76.4 in.
Seville114.3 in204 in54.7 in.71.8 in.
Commercial chassis157.5 in  76.4 in.

DRIVETRAIN OPTIONS

Trackmaster$250
Controlled differential (except Eldorado)$60
Fuel Injection$600

CONVENIENCE OPTIONS

Talisman Brougham$1788
Astro roof$843
Sun roof$668
Rear window defroster, standard on 75s$73
Automatic Level Control$84
Cruise Control$100
Eldorado reclining seat$188
Air cushion restraints$300
Coupe DeVille Cabriolet, without sun roof$236
Eldorado Cabriolet Coupe, without sun roof$413
Brougham d'Elegance Group$784
DeVille d'Elegance group$350
Dual Comfort Six-Way passenger seat$125
AM/FM stereo with tape$229
Padded roof on 75s$745

SPECIFICATIONS

FLUID CAPACITIES

EngineV8 350cc (5.7L)V8 500cc (8.2L)
Crankcase4 qt4 or 5 qt
Crankcase with new filter5 qt5 or 6 qt
AutomaticTransmission after draining8 pt8 or 10 pt
Drive Axle5 pt5 or 4 pt
Fuel tank21 gal(US)27.5 gal(US)
Cooling with heater18.9 qt21.3 or 23 qt
Cooling with A/C18.8 qt21.3 or 23 qt
Heavy duty CoolingNA25.8 qt

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N CodeRSS
Engine typeV8-350cc(5.7L)V8-500cc(8.2L)V8-500cc(8.2L)
Fuel delivery4 bbl4 bblEFI
ManufacturerOldsmobileCadillacCadillac
Original Spark plugR46SXR45NSXR45NSX
Gap0.080 in.0.060 in0.060 in
DistributorElectronicElectronicElectronic
Ignition timing (BTDC)10° (6°)12°
Intake valve opens (BTDC)222121
Fuel pump pressure5¼ to 6½ psi5¼ to 6½ psi39 min.
Idle speed600 rpm600 rpm600 rpm

ALTERNATOR AND REGULATOR SPECS

Part #1102380110102311010331117152
Field current @ 12 V4 - 4.54 - 4.54 - 4.54 - 4.5
Output63 amps80 amps80 amps145 amps
RegulatorSolid stateSolid stateSolid stateSolid state
Volts @ 75°13.8 - 14.813.8 - 14.813.8 - 14.813.8 - 14.8

BATTERY AND STARTER SPECS

EngineV8-350cc (5.7L)V8-500cc (8.2L)
Battery Ampere Hour Capacity6060
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 CodeRSS
Engine typeV8-350cc(5.7L)V8-500cc(8.2L)V8-500cc(8.2L)
ManufacturerOldsmobileCadillacCadillac
Fuel delivery4 bbl4 bblEFI
Horsepower180@4400190@3600215@3600
Torque275@2000360@2000400@2000
Bore x Stoke4.057 x 3.3854.300 x 4.3044.300 x 4.304
Compression Ratio8.00:18.50:18.50:1
Oil pressure35 psi35 psi35 psi

CRANKSHAFT SPECS

Engine typeV8-350cc(5.7L)V8-500cc(8.2L)
Main Brg Journal Dia.2.4985 - 2.4995 (No. 1 2.4988 - 2.4998 in)3.250
Main Brg Oil Clearance0.0005 - 0.0021 (No. 5 0.0015 - 0.0031in)0.0001 - 0.0026
Shaft End-play0.004 - 0.0140.002 - 0.012
Thrust on No.33

CONNECTING ROD SPECS

Engine typeV8-350cc(5.7L)V8-500cc(8.2L)
Journal Dia.2.1238 - 2.12482.5000
Oil Clearance0.0004 - 0.00330.0005 - 0.0028
Side Clearance0.006 - 0.0200.008 - 0.020

PISTON AND RING SPECS

Engine typeV8-350cc(5.7L)V8-350cc(5.7L) DieselV8-500cc(8.2L)
Piston-Bore Clearance0.0010 - 0.00200.0005 - 0.00060.0006 - 0.0010
Ring Side Clearance: Top Compression0.0020 - 0.00400.005 - 0.0070.0017 - 0.0040
Ring Side Clearance: Bottom Compression0.0020 - 0.00400.0018 - 0.00380.0017 - 0.0040
Ring Side Clearance: Oil Control0.0006 - 0.00980.0078 max.None (side sealing)
Ring Gap: Top Compression0.010 - 0.0230.015 - 0.0250.013 - 0.025
Ring Gap: Bottom Compression0.010 - 0.0230.015 - 0.0250.013 - 0.025
Ring Gap: Oil Control0.015 - 0.0550.015 - 0.0550.015 - 0.055

VALVE SPECS

Engine typeV8-350cc(5.7L)V8-350cc(5.7L) DieselV8-500cc(8.2L)
Seat Angle31°(exh)45°(intake); 31° (exhaust)45°
Face Angle30° (exh)44°(intake); 30° (exhaust)44°
Spring Test Pressure187 lb @ 1.27 in.151 lb @ 1.30 in.160 lb @ 1.50 in.
Spring Installed Height1-43/64" (1.671875")1-43/64"11516 in. (1.9375")
Stem-to-Guide Clearance: Intake0.0010 - 0.00270.0010 - 0.00270.0010 - 0.0027
Stem-to-Guide Clearance: Exhaust0.0015 - 0.00320.0015 - 0.00320.0010 - 0.0027
Stem Diameter: Intake0.34290.34290.3416
Stem Diameter: Exhaust0.34240.34240.3416

TORQUE SPECS

Engine typeV8-350cc(5.7L)V8-350cc(5.7L) DieselV8-500cc(8.2L)
Cyl. Head Bolts85 ft.lb130 ft. lb115 ft. lb
Rod Brg Bolts42 ft.lb42 ft. lb40 ft. lb
Main Brg Bolts80 ft.lb (120 on # 5)120 ft. lb90 ft. lb
Crankshaft Damper or Pulley Bolt310 ft.lb200 - 310 ft.lbPress fit
Flywheel to Crankshaft Bolts60 ft.lb60 ft. lb75 ft. lb
Intake Manifold40 ft.lb40 ft. lb30 ft. lb
Exhaust Manifold25 ft.lb25 ft. lb35 ft. lb

CARBURETOR SPECS

Carb ID7056232 (M4ME)7056230 (M4ME)7056530 (M4ME)
Float Level13/32 in13/32 in7/16 in
Air Valve Spring3/8 turn3/8 turn3/8 turn
Pump Rod3/8 in3/8 in9/32 in
Primary Vacuum Break0.160 in0.160 in0.160 in
Secondary Vacuum Break0.160in 0.160in0.160 in
Choke Rod0.080 in0.080 in0.080 in
Choke Unloader0.230 in0.230 in0.230 in
Fast Idle Speed1400 rpm1400 rpm1400 rpm

WHEEL ALIGNMENT SPECS

Feature Eldorado Fleetwood 75 Full size (except Fleetwood 75)Seville
Caster Range 1°N - 1°P 2°N - 0° 1°N - 1°P 1°P - 3°P
Caster Pref. 1°N 2°P
Camber LH wheel Range ¾°N - ¾°P ¾°N - ¾°P ¾°N - ¾°P ¼°N - 1½°P
Camber LH wheel Pref. ½°
Camber RH wheel Range 1°N - ½°P 1°N - ½°P 1°N - ½°P ½°N - 1°P
Camber RH wheel Pref. ½°P ¼°N ¼°N ¼°P
Toe-In 0" 18 in. 18 in. 1/16"
Steering Axis Inclination11° 10 - 5/8°

HISTORICAL NOTES

1976 Cadillac Notes

Calais6,200 (decreased 2,100)
Sedan de Ville67,677 (increased 4,325)
Coupe de Ville114,482 (increased 4,264)
Eldorado49,184 (increased 4,432)
Seville43,772 (increased 27,417)
Series 6024,500 (increased 5,745)
Series 753,324 (decreased 325)



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