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Ford RSG-862 Engine

General Technical Data

Engine Specifications

Engine Model ............... Ford RSG-862
Engine Type ............... 4-cycle overhead cam V-8 industrial power unit
Number of Cylinders ............... 8
Cylinder Arrangement ............... 90 degree V configuration
Engine Bore, in (mm) ............... 4.02 (102.0)
Engine Stroke, in (mm) ............... 3.74 (95.0)
Displacement, cu.in (L) ............... 379 (6.2)
Rated Engine Power, hp (kW) ............... 140-165 (104-123)
Rated Engine Speed, rpm ............... 1800-2800
Peak Torque ............... 365-405 lb-ft (495-549 Nm) at 2000-2400 rpm
Idle Speed ............... 700-850 rpm
Operating Speed ............... 1800-3000 rpm
Compression Ratio ............... 9.8:1
Firing Order ............... 1-3-7-2-6-5-4-8
Valves Per Cylinder ............... 2 intake and 2 exhaust valves
Valvetrain Layout ............... Single overhead cam roller rocker arm configuration
Crankcase Ventilation ............... Closed loop positive crankcase ventilation loop
Cylinder Block Type ............... Cast iron deep-skirt high-strength cross-bolted main caps
Cylinder Head Type ............... Cast aluminum alloy with single overhead camshaft per bank
Lubrication System ............... Full-pressure feed with integrated piston cooling jets
Oil Pump Type ............... Crankshaft-driven rotor type pump
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Liquid forced-circulation bypass system
Water Pump Type ............... Belt-driven centrifugal pump
Air Cleaner Type ............... Heavy-duty dry dual-stage element
Ignition System ............... Coil-on-plug electronic ignition with dual spark plugs per cylinder
Emission Certification ............... EPA and CARB certified for industrial applications
Starting System ............... Electric starter motor assembly
Starter Motor Rating ............... 1.88 hp (1.4 kW)
Electrical System ............... 12V negative ground system
Alternator Rating ............... 75 or 95A

Fuel System

Fuel Injection Type ............... Gaseous fuel carburetor or gasoline sequential port injection
Fuel Control Loop ............... Closed loop control with wide-band heated oxygen sensors
Governor System ............... Electronic drive-by-wire discrete and variable speed control
Fuel Types Compatible ............... Pipeline natural gas, liquefied petroleum gas, dry unleaded fuel
Manifold absolute pressure range, in Hg (kPa) ............... 4.4-31.0 (15.0-105.0)
Natural Gas Feed Pressure, in H2O (kPa) ............... 7.0-11.0 (1.74-2.74)
LPG Liquid Supply Pressure, psi (kPa) ............... 30.0-312.0 (206.0-2151.0)
LPG Vaporizer Outlet Pressure, in H2O (kPa) ............... -0.5 to -1.5 (-0.12 to -0.37)
Gasoline Fuel Delivery Pressure, psi (kPa) ............... 55.0-60.0 (379.0-414.0)
Fuel Filter Rating, microns ............... 5.0
Throttle Body Diameter, in (mm) ............... 2.95 (75.0)
Air-Fuel Ratio Target for Natural Gas ............... 16.0:1-17.2:1
Air-Fuel Ratio Target for LPG ............... 15.5:1
Air-Fuel Ratio Target for Gasoline ............... 14.7:1
Injector Resistance, ohms ............... 11.5-12.5
Regulator Primary Lock-up Pressure, psi (kPa) ............... 4.5-5.5 (31.0-38.0)
Lock-off Solenoid Voltage, V ............... 9.0-16.0 functional electronic operating range
Maximum Fuel Flow Rate, lb/hr (kg/hr) ............... 95.0 (43.0) at full rated capacity
Oxygen Sensor Heater Current, A ............... 1.2-1.9
Evaporative Emissions Purge Line, in (mm) ............... 0.375 (9.5)

Dimensions and Weight

Overall Length, in (mm) ............... 31.8 (810)
Overall Width, in (mm) ............... 31.3 (795)
Overall Height, in (mm) ............... 34.4 (875)
Dry Weight, lbs (kg) ............... 589 (265)
Wet Weight, lbs (kg) ............... 634 (288)

Maintenance Data

Service Information

Compression Pressure, Minimum, psi (kPa) ............... 135.0 (931.0)
Oil Pressure at Idle Speed, psi (kPa) ............... 15.0 (103.0)
Oil Pressure at 2000 rpm, psi (kPa) ............... 45.0-60.0 (310.0-414.0)
Thermostat Opening Start Temp, F (C) ............... 180.0 (82.2)
Thermostat Fully Open Temp, F (C) ............... 202.0 (94.4)
Normal Operating Water Temp, F (C) ............... 185.0-214.0 (85.0-101.0)
Drive Belt Tension Deflection, in (mm) ............... 0.25 (6.4)
Spark Plug Type ............... Motorcraft Iridium core spark plug
Spark Plug Gap, in (mm) ............... 0.041-0.047 (1.05-1.19)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 5W-30
API Service Classifications ......................... SM or SN, GF-4 or GF-5
Engine Oil Capacity with Filter, qt (L) ............... 7.0 (6.6)
Engine Oil Capacity without Filter, qt (L) ............... 6.5 (6.2)
Cooling System Fluid Capacity, qt (L) ............... 14.8 (14.0)

Service Intervals

Change engine oil ............... Every 100 hours
Replace oil filter ............... Every 100 hours
Replace fuel filter ............... Every 250 hours
Inspect air filter ............... Every 100 hours
Replace air filter ............... Every 500 hours
Change coolant ............... Every 2000 hours
Valve-lash adjustment ............... Every 1000 hours
Check fuel system ............... Every 1000 hours
Replace spark plug ............... Every 1000 hours
Compression test ............... Every 1000 hours
Belt inspection ............... Every 150 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 4.020-4.024 (102.00-102.22)
Cylinder Bore Out-of-Round Max, in (mm) ............... 0.0006 (0.015)
Cylinder Bore Taper Maximum, in (mm) ............... 0.0004 (0.010)
Connecting Rod Journal Outer Diameter, in (mm) ............... 2.086-2.087 (52.98-53.01)
Connecting Rod Bearing Oil Clearance, in (mm) ............... 0.0011-0.0027 (0.027-0.069)
Connecting Rod Side Clearance, in (mm) ............... 0.0047-0.0118 (0.12-0.30)
Crankshaft Main Bearing Journal Diameter, in (mm) ............... 2.657-2.658 (67.49-67.52)
Crankshaft Main Bearing Oil Clearance, in (mm) ............... 0.0010-0.0026 (0.025-0.066)
Crankshaft End Play, in (mm) ............... 0.0030-0.0085 (0.075-0.215)
Piston to Cylinder Wall Clearance, in (mm) ............... 0.0012-0.0022 (0.030-0.056)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0002-0.0005 (0.005-0.013)
Piston Pin Outer Diameter, in (mm) ............... 1.0234-1.0236 (25.994-26.000)
Top Ring Groove Clearance, in (mm) ............... 0.0018-0.0037 (0.046-0.094)
Second Ring Groove Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Oil Ring Groove Clearance, in (mm) ............... 0.0008-0.0024 (0.020-0.060)
Top Ring End Gap, in (mm) ............... 0.010-0.016 (0.25-0.40)
Second Ring End Gap, in (mm) ............... 0.016-0.026 (0.40-0.65)
Oil Ring End Gap, in (mm) ............... 0.008-0.024 (0.20-0.60)
Cylinder Head Flatness Deflection, in (mm) ............... 0.0020 (0.050)
Cylinder Block Deck Face Flatness, in (mm) ............... 0.0030 (0.076)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.2740-0.2747 (6.960-6.978)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.2732-0.2739 (6.939-6.957)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0008-0.0025 (0.020-0.063)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0016-0.0032 (0.040-0.082)
Valve Guide Installed Position Height, in (mm) ............... 0.580-0.610 (14.73-15.49)
Valve Face Angle, deg ............... 45.0
Valve Seat Angle, deg ............... 45.0
Valve Spring Free Length, in (mm) ............... 1.985 (50.42)
Camshaft Journal Outer Diameter, in (mm) ............... 1.022-1.024 (25.97-26.01)
Camshaft Bearing Oil Clearance, in (mm) ............... 0.0010-0.0030 (0.025-0.076)
Camshaft End Play, in (mm) ............... 0.0015-0.0075 (0.038-0.190)

Tightening Torques

Cylinder Head Bolts (1-Step) ............... 26 lb-ft (35 Nm)
Cylinder Head Bolts (2-Step) ............... 59 lb-ft (80 Nm)
Cylinder Head Bolts (3-Step) ............... 90.0 deg Angle Turn
Main Bearing Cap Bolts (1-Step) ............... 22 lb-ft (30 Nm)
Main Bearing Cap Bolts (2-Step) ............... 44 lb-ft (60 Nm)
Main Bearing Cap Bolts (3-Step) ............... 90.0 deg Angle Turn
Connecting Rod Cap Bolts (1-Step) ............... 26 lb-ft (35 Nm)
Connecting Rod Cap Bolts (2-Step) ............... 52 lb-ft (70 Nm)
Connecting Rod Cap Bolts (3-Step) ............... 90.0 deg Angle Turn
Flywheel Mounting Bolts ............... 89 lb-ft (120 Nm)
Vibration Damper Crankshaft Center Bolt ............... 148 lb-ft (200 Nm)
Camshaft Sprocket Gear Attachment Bolt ............... 92 lb-ft (125 Nm)
Camshaft Thrust Retaining Plate Screw ............... 84 lb-in (9.5 Nm)
Camshaft Bearing Tower Cap Nuts ............... 16 lb-ft (22 Nm)
Engine Intake Manifold Plenum Fasteners ............... 18 lb-ft (25 Nm)
Exhaust Manifold Casting Stud Nuts ............... 26 lb-ft (35 Nm)
Oil Sump Pan Drain Attachment Screws ............... 106 lb-in (12 Nm)
Oil Pan Main Center Drain Plug ............... 20 lb-ft (27 Nm)
Front Engine Cover Plate Attachment Bolts ............... 18 lb-ft (25 Nm)
Rear Crankshaft Oil Seal Carrier Fasteners ............... 84 lb-in (9.5 Nm)
Rocker Arm Shaft Support Pedestal Screws ............... 22 lb-ft (30 Nm)
Valve Enclosure Top Rocker Cover Fasteners ............... 84 lb-in (9.5 Nm)
Spark Plug Thread Sockets ............... 133 lb-in (15 Nm)
Water Pump Assembly Block Entry Bolts ............... 18 lb-ft (25 Nm)
Coolant Thermostat Housing Cover Screws ............... 84 lb-in (9.5 Nm)
Alternator Main Support Swivel Frame Bolt ............... 35 lb-ft (48 Nm)
Starter Motor Body Mounting Flange Bolts ............... 35 lb-ft (48 Nm)
Fuel Rail Attachment Stud Isolator Hex Nuts ............... 18 lb-ft (25 Nm)
Gaseous Carburetor To Inlet Manifold Bolts ............... 106 lb-in (12 Nm)
Knock Sensing Monitor Device Electronic Ports ............... 16 lb-ft (22 Nm)
Crankshaft Position Timing Sensor Screw ............... 84 lb-in (9.5 Nm)
Camshaft Position Phase Sensor Screw ............... 84 lb-in (9.5 Nm)
Oil Pressure Monitoring Safety Sump Switch ............... 106 lb-in (12 Nm)
Lubrication Full Flow Filter Sunk Spin-on Hub ............... 11 lb-ft (15 Nm)
Flywheel Housing Backing Plate Shell Bolts ............... 38 lb-ft (52 Nm)
Breather Oil Separation Vessel Small Screws ............... 84 lb-in (9.5 Nm)

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