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Ford CSG-649i Engine

General Technical Data

Engine Specifications

Engine Model ............... Ford CSG-649i
Engine Type ............... 4-stroke inline 6-cylinder carbureted/LPG/NG liquid-cooled gasoline
Number of Cylinders ............... 6
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 4.00 (101.6)
Engine Stroke, in (mm) ............... 3.98 (101.1)
Displacement, cu.in (L) ............... 300 (4.9)
Rated Engine Power, hp (kW) ............... 124-150 (92-112)
Rated Engine Speed, rpm ............... 2500-3400
Peak Torque ............... 353 Nm (260 lb-ft) at 1600-2000 rpm
Idle Speed ............... 700-800 rpm
Operating Speed ............... 1800-2800 rpm
Compression Ratio ............... 8.0:1-8.8:1
Firing Order ............... 1-5-3-6-2-4
Manifold Configuration ............... Single side intake and exhaust layout
Valve Train Operation ............... Overhead valve pushrod actuated gear-to-gear driven camshaft
Camshaft Drive ............... Cast iron matching helical gears directly driven
Cylinder Block Type ............... Cast iron seven main bearings
Cylinder Head Type ............... Cast iron heavy duty industrial D-shaped combustion chamber
Lubrication System ............... Full-pressure gear-driven
Oil Pump Type ............... Gear-driven internal
Oil Filter Type ............... Full-flow spin-on disposable
Cooling System ............... Liquid-cooled radiator integrated centrifugal pump
Water Pump Type ............... Belt-driven centrifugal
Air Cleaner Type ............... Dry heavy duty dual element
Ignition System ............... Solid state electronic distributor or breaker point assembly
Starting System ............... Electric starter motor
Electrical System ............... 12V positive ground or negative ground configuration
Alternator Output ............... 40-60A

Fuel System

Fuel Type Designation ............... Unleaded gasoline or Liquefied Petroleum Gas or Natural Gas
Fuel Induction ............... Downdraft single barrel carburetor or gaseous fuel regulator
Carburetor Manufacturer ............... Zenith or Carter down-draft single venture industrial config
Gaseous Regulator Type ............... Impco secondary pressure zero governor demand regulator
Fuel Pump Type ............... Mechanical diaphragm engine block driven or low pressure electronic external
Fuel Delivery Pressure, psi (kPa) ............... 4.0-6.0 (27.5-41.3)
Gasoline Octane Requirement ............... 87 AKI regular unleaded minimum rating
Natural Gas Energy Content, BTU/cu.ft ............... 1000 minimum dry value standard operating condition
Propane Purity Level ............... HD-5 premium industrial grade liquified petroleum gas
Air-Fuel Ratio Gasoline ............... 14.7:1 stoichiometric combustion optimum baseline rating
Air-Fuel Ratio Natural Gas ............... 17.2:1 lean or stoichiometric specialized adjustment matrix
Inlet Fuel Fitting Size, in ............... 0.25 National Pipe Thread internal thread inlet port
Lock-off Valve Voltage ............... 12V direct current fuel shutoff solenoid safety setup
Main Metering Jet Size Gasoline ............... 0.058 fixed orifice high altitude adaptable options
Idle Mixture Regulation ............... Manual spring loaded needle adjustment needle parameter control
Choke Configuration ............... Electric heating element or manual cable override remote link
Governor Type ............... Mechanical velocity or electronic governor integrated assembly
Governor Control Linkage ............... Solid steel rod dual ball joint positive feedback setup
Fuel Filter Rating, microns ............... 10 inline inline replaceable element paper barrier media
Fuel Consumptive Rate Rated, gal/hr (L/hr) ............... 4.5-6.5 (17.0-24.6)
Maximum Supply Pressure Gaseous, psi (kPa) ............... 11.0 (75.8)
Venturi Diameter, in (mm) ............... 1.25 (31.75)
Throttle Bore Diameter, in (mm) ............... 1.50 (38.1)

Dimensions and Weight

Overall Length, in (mm) ............... 40.2 (1020)
Overall Width, in (mm) ............... 22.5 (570)
Overall Height, in (mm) ............... 33.8 (860)
Dry Weight, lbs (kg) ............... 505 (229)
Wet Weight, lbs (kg) ............... 545 (247)

Maintenance Data

Service Information

Compression Pressure, Minimum, psi (kPa) ............... 150 (1034.0)
Oil Pressure at Rated Speed, psi (kPa) ............... 40.0-60.0 (275.8-413.7)
Oil Pressure at Idle Speed, psi (kPa) ............... 15.0-25.0 (103.4-172.4)
Thermostat Start To Open, F (C) ............... 180 (82.2)
Thermostat Fully Open Target, F (C) ............... 202 (94.4)
Spark Plug Type ............... Motorcraft AGSF-32C or equivalent
Spark Plug Gap, in (mm) ............... 0.044 (1.12)
Breaker Point Gap, in (mm) ............... 0.017 (0.43)
Drive Belt Deflection Value, in (mm) ............... 0.25-0.38 (6.4-9.7)

Engine Oil and Coolant

Engine Oil Type .................. SAE 5W-30, 10W-30
API Service Classifications ......................... SJ or higher
Oil Capacity, qt (L) ............... 6.0 (5.7)
Coolant Capacity, qt (L) ............... 13.0 (12.3)

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 1000 hours
Replace spark plug ............... Every 500 hours
Compression test ............... Every 1000 hours
Belt inspection ............... Every 100 hours

Service Specifications

Cylinder Bore Inside Diameter, in (mm) ............... 4.000-4.004 (101.600-101.702)
Cylinder Bore Out of Round, in (mm) ............... 0.0015 (0.0381)
Cylinder Bore Taper Maximum, in (mm) ............... 0.0010 (0.0254)
Main Bearing Journal Diameter, in (mm) ............... 2.399-2.400 (60.935-60.960)
Main Bearing Oil Clearance, in (mm) ............... 0.0015-0.0027 (0.0381-0.0686)
Connecting Rod Journal Diameter, in (mm) ............... 2.298-2.299 (58.369-58.395)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0015-0.0025 (0.0381-0.0635)
Connecting Rod Side Clearance, in (mm) ............... 0.007-0.013 (0.1778-0.3302)
Crankshaft End Play, in (mm) ............... 0.004-0.008 (0.1016-0.2032)
Piston to Cylinder Wall Clearance, in (mm) ............... 0.0018-0.0026 (0.0457-0.0660)
Piston Pin Diameter, in (mm) ............... 0.975-0.976 (24.765-24.790)
Piston Pin to Piston Pin Bore Clearance, in (mm) ............... 0.0003-0.0005 (0.0076-0.0127)
Piston Pin to Con Rod Bushing Clearance, in (mm) ............... 0.0005-0.0009 (0.0127-0.0229)
Top Ring End Gap, in (mm) ............... 0.013-0.023 (0.3302-0.5842)
Second Ring End Gap, in (mm) ............... 0.013-0.023 (0.3302-0.5842)
Oil Ring End Gap, in (mm) ............... 0.015-0.055 (0.3810-1.3970)
Top Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.0508-0.1016)
Second Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.0508-0.1016)
Oil Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.0508-0.1016)
Cylinder Head Surface Flatness, in (mm) ............... 0.003 (0.0762)
Cylinder Block Mating Surface Flatness, in (mm) ............... 0.004 (0.1016)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.341-0.342 (8.661-8.687)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.340-0.341 (8.636-8.661)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0010-0.0024 (0.0254-0.0610)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0020-0.0034 (0.0508-0.0864)
Valve Face Angle, deg ............... 45
Valve Seat Angle, deg ............... 45
Valve Margin Thickness, in (mm) ............... 0.031 (0.787)
Valve Spring Free Length, in (mm) ............... 2.13 (54.10)
Camshaft Journal Diameter Standard, in (mm) ............... 2.027-2.028 (51.486-51.511)
Camshaft Bearing Clearance Limit, in (mm) ............... 0.001-0.003 (0.0254-0.0762)
Camshaft End Play, in (mm) ............... 0.001-0.007 (0.0254-0.1778)
Cam Lobe Lift (Intake), in (mm) ............... 0.249 (6.325)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.249 (6.325)
Timing Gear Backlash Clearance, in (mm) ............... 0.002-0.006 (0.0508-0.1524)
Oil Pump Rotor End Clearance, in (mm) ............... 0.001-0.004 (0.0254-0.1016)
Tappet Bore Diameter, in (mm) ............... 0.875-0.876 (22.225-22.250)
Tappet to Lifter Bore Clearance, in (mm) ............... 0.0005-0.0021 (0.0127-0.0533)

Tightening Torques

Cylinder Head Bolts (Step One), lb-ft (Nm) ............... 55 (74.6)
Cylinder Head Bolts (Step Two), lb-ft (Nm) ............... 65 (88.1)
Cylinder Head Bolts (Step Three), lb-ft (Nm) ............... 75 (101.7)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 65-75 (88.1-101.7)
Connecting Rod Cap Nut, lb-ft (Nm) ............... 40-45 (54.2-61.0)
Flywheel to Crankshaft Hub Bolts, lb-ft (Nm) ............... 60-65 (81.3-88.1)
Vibration Damper to Crank Center Bolt, lb-ft (Nm) ............... 130-150 (176.3-203.4)
Manifold Assembly Intake Exhaust Combination, lb-ft (Nm) ............... 25-30 (33.9-40.7)
Rocker Arm Pedestal Attaching Bolts, lb-ft (Nm) ............... 17-23 (23.1-31.2)
Rocker Arm Stud Threaded Base Block, lb-ft (Nm) ............... 30-35 (40.7-47.5)
Oil Pan Assembly Mating Perimeter Bolts, lb-ft (Nm) ............... 10-12 (13.6-16.3)
Oil Pan Sump Bottom Drain Plug, lb-ft (Nm) ............... 20-25 (27.1-33.9)
Oil Pump Body to Block Mount, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Oil Pump Screen and Cover Assembly, lb-ft (Nm) ............... 10-12 (13.6-16.3)
Cylinder Front Cover Timing Gear Shield, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Water Pump Housing Attachment Fasteners, lb-ft (Nm) ............... 15-20 (20.3-27.1)
Thermostat Housing Water Outlet Flange, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Distributor Hold Down Clamp Bolt, lb-ft (Nm) ............... 15-18 (20.3-24.4)
Spark Plug Thread Seating Force, lb-ft (Nm) ............... 15-20 (20.3-27.1)
Valve Rocker Arm Cover Fasteners, lb-ft (Nm) ............... 6-9 (8.1-12.2)
Fuel Pump Mechanical Block Mount Bolts, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Alternator Pivot Mount Heavy Structural Bolt, lb-ft (Nm) ............... 40-50 (54.2-67.8)
Alternator Adjusting Strap Tensioner Bolt, lb-ft (Nm) ............... 22-26 (29.8-35.3)
Starter Motor Flange Mounting Stud Nuts, lb-ft (Nm) ............... 45-55 (61.0-74.6)
Flywheel Housing to Cylinder Block Bolts, lb-ft (Nm) ............... 40-50 (54.2-67.8)
Camshaft Thrust Plate Assembly Mount Retainers, lb-ft (Nm) ............... 9-12 (12.2-16.3)
Crankshaft Rear Main Seal Retainer Holder, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Oil Pressure Sending Unit Switch Fitting, lb-ft (Nm) ............... 8-12 (10.9-16.3)
Carburetor Base Assembly Mounting Stud Nuts, lb-ft (Nm) ............... 12-15 (16.3-20.3)
Governor Housing Mechanical Drive Mounting, lb-ft (Nm) ............... 15-20 (20.3-27.1)
Air Cleaner Support Bracket Frame Braces, lb-ft (Nm) ............... 18-22 (24.4-29.8)
Exhaust Pipe Extension Flange Connection Nuts, lb-ft (Nm) ............... 25-35 (33.9-47.5)
Fan Blade Assembly Hub Extension Bolts, lb-ft (Nm) ............... 15-20 (20.3-27.1)
Crankshaft Pulley Accessory Drive Dampener, lb-ft (Nm) ............... 35-45 (47.5-61.0)

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