Cadillac Service Repair Manuals


All-new Eldorado and Seville models entered the lineup for 1986, loaded with a diagnostic system and electronic instruments. Anti-lock braking was a new option on Fleetwood and DeVille. All Cadillacs were now front-wheel drive except the big Brougham, which hung on for another year with a 5.0 liter V-8 under the hood.

Luxury touches promoted in the full-line catalog ranged from golden ignition keys all the way to elegant option packages, to deliver "the feeling of uncompromising excellence." In keeping with that promise, diesel engines departed from the Cadillac option list, victims of lack of interest and an unimpressive reliability record.

The HT 4100 V-8 added stainless steel exhaust manifolds. Door locks had new rocker switches. Floor consoles contained an ashtray that opened at a finger's touch. And to keep up with the times, a cellular telephone ("discreetly" positioned in a fold-down armrest) joined the option list. To attract buyers who preferred good handling to a cushy ride, DeVilles could also get a Touring Coupe or Touring Sedan option with stiffer suspension and related extras.

Over 40 body colors were available, including nine Firemist shades and two Pearlmist (black cherry or black emerald) that changed character according to the angle and intensity of sunlight striking the car's surface.

V.I.N. DATA

SPECIFICATIONS

FLUID CAPACITIES

EngineV8 250cc (4.1L)V8 307cc (5.0L)
Crankcase5 qt4 qt
Crankcase with new filter5 qt5
AutomaticTransmission after draining13 pt10.6 pt
Drive AxleNA3.6 pt
Fuel tank18.0 gal(US)24.5 gal(US)
Cooling with heater12.6 qt15.3 qt
Cooling with A/C12.6 qt15.3 qt
Heavy duty CoolingNANA

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N Code8Y
Engine typeV8-250cc (4.1L)V8-307cc (5.0L)
Fuel deliveryDFI4 bbl
ManufacturerCadillacOldsmobile
Original Spark plugR42CLTS6FR3LS6
Gap0.060 in.0.060 in.
DistributorElectronicElectronic
Ignition timing (BTDC)See underhood stickerSee underhood sticker
Intake valve opens (BTDC)See underhood stickerSee underhood sticker
Fuel pump pressure12-145½-6½
Idle speedSee underhood stickerSee underhood sticker

ALTERNATOR AND REGULATOR SPECS

Part #110549311055721105657
Field current @ 12 V4-4.54-4.54-4.5
Output94 amps94 amps120 amps
RegulatorSolid stateSolid stateSolid state
Volts @ 75°13.8-14.813.8-14.813.8-14.8

BATTERY AND STARTER SPECS

EngineV8-250cc (4.1L)V8-307cc (5.0L)
Battery Ampere Hour Capacity540 amps cold cranking power @ 0°F
Battery Volts1212
Battery Terminal GroundedNeg.Neg.
Starter, Lock Test, AmpsNot 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 Code8Y
Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
ManufacturerCadillacOldsmobile
Fuel deliveryDFIDiesel
Horsepower130@4200140@3200
Torque200@2200198@2000
Bore x Stoke3.465 x 3.3073.800 x 3.385
Compression Ratio9.1:17.9:1
Oil pressure30 psi30 psi

CRANKSHAFT SPECS

Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
Main Brg Journal Dia.2.6402.4988-2.4998 (No. 2, 3, 4, 5: 2.4985-2.4995)
Main Brg Oil Clearance0.0004-0.00270.0005-0.0021 (No. 5: 0.0015-0.0031)
Shaft End-play0.001-0.0070.0035-0.0135
Thrust on No.33

CONNECTING ROD SPECS

Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
Journal Dia.2.052-2.0542.1238-2.1248
Oil Clearance0.0005-0.00280.0004-0.0033
Side Clearance0.008-0.0200.006-0.020

PISTON AND RING SPECS

Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
Piston-Bore Clearance0.00080.0008-0.0018
Ring Side Clearance: Top Compression0.0016-0.00370.0020-0.0040
Ring Side Clearance: Bottom Compression0.0016-0.00370.0020-0.0040
Ring Side Clearance: Oil ControlNone (side sealing)0.0010-0.0050
Ring Gap: Top Compression0.015-0.0250.009-0.019 (with TRW rings: 0.010-0.025)
Ring Gap: Bottom Compression0.015-0.0250.009-0.019 (with TRW rings: 0.010-0.025)
Ring Gap: Oil Control0.010-0.0500.015-0.055

VALVE SPECS

Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
Seat Angle45°45° (exhaust: 60°)
Face Angle44°46° (exhaust: 59°)
Spring Test Pressure167 lb @ 1.34"187 lb @ 1.27"
Spring Installed Height1-43/64"1-47/64"
Stem-to-Guide Clearance: Intake0.0010-0.00300.0010-0.0027
Stem-to-Guide Clearance: Exhaust0.0010-0.00300.0015-0.0032
Stem Diameter: Intake0.3413-0.34200.3425-0.3432
Stem Diameter: Exhaust0.3411-0.34180.3420-0.3427

TORQUE SPECS

Engine typeV8-250cc(4.1L)V8-307cc(5.0L)
Cyl. Head Bolts90 ft.lb125 ft. lb
Rod Brg Bolts22 ft.lb42 ft. lb
Main Brg Bolts85 ft.lb80 ft. lb (Rear main: 120)
Crankshaft Damper or Pulley BoltPress fit200-310 ft. lb
Flywheel to Crankshaft Bolts37 ft.lb60 ft. lb
Intake Manifold 40 ft. lb
Exhaust Manifold18 ft.lb25 ft. lb

CARBURETOR SPECS

Carb ID17086008 (E4MC)17086008 (E4MC)
Float Level1132 in.14/32 in
Air Valve Spring1/2 turn1/2 turn
Pump Rodfixedfixed
Primary Vacuum Break0.142 in/25°0.142 in/25°
Secondary Vacuum Break0.278 in/43°0.278 in/43°
Choke Rod14°14°
Choke Unloader0.220 in/35°0.220 in/35°
Fast Idle SpeedSee underhood decal

WHEEL ALIGNMENT SPECS

Feature Eldorado Full size Seville
Caster Range 1½°P-3½°P 3½°P-4½°P 1½°P-3½°P
Caster Pref. 2½°P 4°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 1/5 in to 1/5 out 18 in. 1/5 in to 1/5 out
Steering Axis Inclination11° 10-19/32° 11°

HISTORICAL NOTES

1986 Cadillac Notes

Cimarron24,534 (increased 4,644)
Fleetwood/de Ville series215,709 (decreased 15,997)
Eldorado21,342 (decreased 55,059)
Seville19,098 (decreased 20,657)
Series 751,000 (increased 595)



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