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Ford LSG-875i Engine

General Technical Data

Engine Specifications

Engine Model ............... Ford LSG-875i
Engine Series ............... Ford 385 Series Big Block V8
Engine Type ............... 4-stroke overhead valve electronic fuel injected liquid cooled gasoline
Number of Cylinders ............... 8
Cylinder Arrangement ............... 90 degree V configuration
Engine Bore, in (mm) ............... 4.360 (110.74)
Engine Stroke, in (mm) ............... 3.850 (97.79)
Displacement, cu.in (L) ............... 460 (7.5)
Rated Engine Power, hp (kW) ............... 150-245 (112-183) at 2800-3600 rpm
Peak Torque ............... 365-400 lb-ft (495-542 Nm) at 1800-2400 rpm
Max No Load Speed, rpm ............... 2800-3000
Continuous Duty Speed, rpm ............... 1800-2400
Compression Ratio ............... 8.5:1-8.6:1
Firing Order ............... 1-5-4-2-6-3-7-8
Cylinder Block Type ............... Heavy cast iron piece
Cylinder Head Type ............... Cast iron with hardened exhaust seat inserts
Valves per Cylinder ............... 2
Valve Configuration ............... Overhead valve pushrod actuated
Lubrication System ............... Full force pressure feed system
Oil Pump Type ............... Internal gear style pump
Oil Filter Type ............... Spin-on full flow cartridge
Cooling System ............... Liquid circulation with radiator
Water Pump Type ............... Front mounted belt driven centrifugal pump
Air Cleaner Type ............... Heavy dry elements dual element type
Ignition System ............... Breakerless solid state electronic distributor setup
Starting System ............... Electric starting motor
Electrical System ............... 12V negative ground system
Alternator Capacity ............... 40-60A

Fuel System

Fuel Injection Type ............... Multi-port electronic fuel injection or gaseous mixer system
Primary Fuel Compatibility ............... Unleaded gasoline, liquefied petroleum gas, natural gas vapor
Gaseous Mixer Type ............... Impco or equivalent dry fuel delivery system
Manifold Configuration ............... Cast iron dry fuel multi port runner architecture
Governor Type ............... Electronic or hydraulic governor system
Fuel Delivery Pressure, psi (kPa) ............... 35-45 (241-310)
Gaseous Fuel Pressure, in H2O (kPa) ............... 4.0-6.0 (1.0-1.5)
Electronic Throttle Control ............... Integrated actuator system linkage
Air Fuel Ratio Controller ............... Closed loop oxygen sensor monitoring module
Injectors Impedance, ohm ............... 12.0-16.0

Dimensions and Weight

Overall Length, in (mm) ............... 34.5 (875)
Overall Width, in (mm) ............... 29.8 (755)
Overall Height, in (mm) ............... 33.2 (845)
Dry Weight, lbs (kg) ............... 640-720 (290-326)

Maintenance Data

Service Information

Compression Pressure, Minimum, psi (kPa) ............... 130 (896)
Minimum Oil Pressure at Low Idle, psi (kPa) ............... 12-15 (83-103)
Normal Oil Pressure at Rated Speed, psi (kPa) ............... 40-60 (276-414)
Thermostat Opening Temperature, F (C) ............... 180-192 (82-89)
Thermostat Full Open Temperature, F (C) ............... 202-212 (94-100)
Spark Plug Gap, in (mm) ............... 0.042-0.046 (1.07-1.17)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40
API Service Classifications ......................... SF or SG
Crankcase Oil Capacity with Filter, qt (L) ............... 6.0-7.0 (5.7-6.6)
Coolant Capacity, Engine Only, qt (L) ............... 15.5 (14.7)

Service Intervals

Change engine oil ............... Every 100 hours
Replace oil filter ............... Every 100 hours
Replace fuel filter ............... Every 250 hours
Inspect air filter ............... Every 50 hours
Replace air filter ............... Every 250 hours
Change coolant ............... Every 1000 hours
Valve-lash adjustment ............... Every 500 hours
Check fuel system ............... Every 500 hours
Replace spark plug ............... Every 500 hours
Compression test ............... Every 500 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 4.360-4.364 (110.74-110.85)
Cylinder Bore Out of Round, in (mm) ............... 0.0015 (0.038)
Cylinder Bore Taper Limit, in (mm) ............... 0.0010 (0.025)
Main Bearing Journal Diameter, in (mm) ............... 2.999-3.000 (76.17-76.20)
Main Bearing Oil Clearance, in (mm) ............... 0.0008-0.0026 (0.020-0.066)
Connecting Rod Journal Diameter, in (mm) ............... 2.499-2.500 (63.47-63.50)
Connecting Rod Oil Clearance, in (mm) ............... 0.0008-0.0026 (0.020-0.066)
Crankshaft End Play, in (mm) ............... 0.004-0.008 (0.10-0.20)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0014-0.0022 (0.036-0.056)
Piston Pin Bore Inside Diameter, in (mm) ............... 1.0401-1.0405 (26.419-26.429)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0002-0.0004 (0.005-0.010)
Top Ring End Gap, in (mm) ............... 0.015-0.025 (0.38-0.64)
Second Ring End Gap, in (mm) ............... 0.015-0.025 (0.38-0.64)
Oil Ring End Gap, in (mm) ............... 0.015-0.055 (0.38-1.40)
Top Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.05-0.10)
Second Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.05-0.10)
Oil Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.05-0.10)
Cylinder Head Flatness Maximum, in (mm) ............... 0.0030 (0.076)
Cylinder Block Deck Flatness, in (mm) ............... 0.0030 (0.076)
Intake Valve Stem Outside Diameter, in (mm) ............... 0.341-0.342 (8.66-8.69)
Exhaust Valve Stem Outside Diameter, in (mm) ............... 0.340-0.341 (8.64-8.66)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0010-0.0024 (0.025-0.061)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0015-0.0030 (0.038-0.076)
Valve Face Angle, deg ............... 44.5
Valve Seat Angle, deg ............... 45
Valve Guide Inside Diameter, in (mm) ............... 0.343-0.344 (8.71-8.74)
Valve Spring Free Length, in (mm) ............... 2.110 (53.59)
Camshaft Journal Diameter, in (mm) ............... 2.249-2.250 (57.12-57.15)
Camshaft Journal Clearance, in (mm) ............... 0.001-0.003 (0.025-0.076)
Camshaft End Play, in (mm) ............... 0.002-0.006 (0.05-0.15)

Tightening Torques

Cylinder Head Bolts (Step 1), lb-ft (Nm) ............... 80 (108)
Cylinder Head Bolts (Step 2), lb-ft (Nm) ............... 110 (149)
Cylinder Head Bolts (Step 3), lb-ft (Nm) ............... 140 (190)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 95-105 (129-142)
Connecting Rod Cap Nuts, lb-ft (Nm) ............... 40-45 (54-61)
Flywheel to Crankshaft Bolts, lb-ft (Nm) ............... 75-85 (102-115)
Vibration Damper to Crankshaft Bolt, lb-ft (Nm) ............... 70-90 (95-122)
Intake Manifold Fasteners, lb-ft (Nm) ............... 25-35 (34-47)
Exhaust Manifold Fasteners, lb-ft (Nm) ............... 25-35 (34-47)
Rocker Arm Shaft Support Bolts, lb-ft (Nm) ............... 40-45 (54-61)
Oil Pump Assembly Retention Bolt, lb-ft (Nm) ............... 12-15 (16-20)
Oil Pan Drain Plug, lb-ft (Nm) ............... 15-25 (20-34)
Oil Pan Rail Screws, lb-ft (Nm) ............... 7-10 (10-14)
Timing Gear Cover Bolts, lb-ft (Nm) ............... 12-15 (16-20)
Spark Plug, lb-ft (Nm) ............... 15-20 (20-27)
Water Pump Assembly Screws, lb-ft (Nm) ............... 12-15 (16-20)
Distributor Clamp Bolt, lb-ft (Nm) ............... 12-15 (16-20)
Flywheel Housing to Block Bolts, lb-ft (Nm) ............... 40-50 (54-68)
Valve Cover Attachment Screws, lb-ft (Nm) ............... 7-10 (10-14)
Fuel Pump Mechanical Bolts, lb-ft (Nm) ............... 12-15 (16-20)
Thermostat Housing Attachment Screws, lb-ft (Nm) ............... 12-15 (16-20)
Governor Drive Housing Bolts, lb-ft (Nm) ............... 15-20 (20-27)
Alternator Pivot Adjustment Mounting Bolt, lb-ft (Nm) ............... 24-32 (33-43)
Crankshaft Pulley to Damper Screws, lb-ft (Nm) ............... 35-45 (47-61)
Camshaft Thrust Plate Retaining Bolts, lb-ft (Nm) ............... 9-12 (12-16)
Front Cover Timing Gear Assembly, lb-ft (Nm) ............... 12-18 (16-24)
Water Pump Pulley Bolt Pack, lb-ft (Nm) ............... 15-20 (20-27)
Starter Motor Mounting Bolts Frame, lb-ft (Nm) ............... 35-45 (47-61)
Fuel Rail Mounting Bolts Pack, lb-ft (Nm) ............... 7-10 (10-14)

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