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Ford VSG-411 Engine

General Technical Data

Engine Specifications

Engine Model ............... Ford VSG-411
Engine Type ............... 4-cycle overhead valve inline 4-cylinder liquid-cooled gasoline/LPG
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 2.9118 (73.960)
Engine Stroke, in (mm) ............... 2.5583 (64.980)
Displacement, cu.in (L) ............... 67.0 (1.10)
Rated Engine Power, hp (kW) ............... 44.0-45.0 (32.8-33.5) at 4000 rpm
Continuous Power, hp (kW) ............... 32.0 (23.9) at 3000 rpm
Intermittent Power, hp (kW) ............... 40.0 (29.8) at 3600 rpm
Peak Torque, lb-ft (Nm) ............... 56.0-58.0 (76.0-78.6) at 2200 rpm
Idle Speed Minimum, rpm ............... 750-800
High Idle Speed Maximum, rpm ............... 3850-4000
Operating Speed, rpm ............... 1500-3600
Compression Ratio ............... 9.0:1-9.5:1
Firing Order ............... 1-2-4-3
Cylinder Block Material ............... Cast iron
Cylinder Head Material ............... Cast iron
Valvetrain Config ............... Overhead Valve pushrod actuated mechanical lifters
Number of Valves per Cylinder ............... 2
Lubrication System ............... Full-pressure wet sump feed
Oil Pump Config ............... Gear-driven trochoid rotary pump
Oil Filter Type ............... Full-flow spin-on disposable cartridge
Cooling System ............... Closed-loop pressurized liquid circulation forced centrifugal flow
Water Pump Type ............... Belt-driven centrifugal impeller
Air Filter Assembly ............... Dry element multi-stage filter housing
Ignition System ............... Electronic distributor or distributorless solid-state assembly
Starting System ............... Electric solenoid engaged starter motor
Electrical System, V ............... 12

Fuel System

Primary Fuel Compatibility ............... Low-lead gasoline or unleaded regular fuel
Secondary Fuel Compatibility ............... Liquefied Petroleum Gas vaporized gaseous fuel
Tertiary Fuel Compatibility ............... Compressed Natural Gas regulated gaseous dry fuel
Carburetor Manufacturer Type ............... Zenith or Motorcraft single-barrel downdraft assembly
Carburetor Venturi Diameter, in (mm) ............... 1.02 (26.0)
Main Jet Orifice Diameter Gasoline, in (mm) ............... 0.045 (1.14)
Idle Jet Orifice Diameter Gasoline, in (mm) ............... 0.019 (0.48)
Fuel Pump Mechanical Design ............... Camshaft lobe actuated diaphragm pump
Fuel Pump Output Pressure, psi (bar) ............... 3.5-5.0 (0.24-0.34)
Fuel Pump Delivery Rate Minimum, gal/hr (L/hr) ............... 15.0 (56.7)
LPG Regulator Manufacturer Type ............... Impco or Nolffs secondary atmospheric zero governor
LPG Vaporizer Primary Heat Source ............... Engine liquid coolant loop circulation
LPG Air-Fuel Mixer Configuration ............... Diaphragm air valve metering assembly
Gaseous Fuel Supply Inlet Pressure, in H2O (mbar) ............... 11.0 (27.4)
Fuel Filter Core Element ............... Replaceable pleated treated paper element
Choke Actuation Method ............... Manual cable mechanism or electric bi-metal coil heater
Governor System Mechanism ............... Mechanical centrifugal flyweight or electronic velocity controller
Idle Fuel Mixture Adjustment ............... Needle valve spring loaded manual bleed screw
Float Level Height Setting, in (mm) ............... 0.28 (7.1)
Float Drop Limit Maximum, in (mm) ............... 1.14 (29.0)

Dimensions and Weight

Overall Length, in (mm) ............... 22.4 (570)
Overall Width, in (mm) ............... 19.8 (505)
Overall Height, in (mm) ............... 24.2 (615)
Dry Weight (Bare Block), lbs (kg) ............... 185 (84)
Dry Weight (Industrial Assembly), lbs (kg) ............... 242 (110)
Operating Weight, lbs (kg) ............... 265 (120)

Maintenance Data

Service Information

Compression Pressure Limit, psi (bar) ............... 150.0-196.0 (10.34-13.51)
Oil Pressure at Rated Speed, psi (bar) ............... 35.0-55.0 (2.41-3.79)
Oil Pressure at Idle Speed, psi (bar) ............... 15.0 (1.03)
Thermostat Opening Initial Temperature, F (C) ............... 180.0 (82.2)
Thermostat Fully Open Temperature, F (C) ............... 202.0 (94.4)
Cooling System Cap Pressure, psi (bar) ............... 13.0 (0.90)
Spark Plug Reach, in (mm) ............... 0.75 (19.0)
Spark Plug Gap, in (mm) ............... 0.035 (0.89)
Breaker Point Gap, in (mm) ............... 0.015 (0.38)
Ignition Timing (Gasoline), deg BTDC ............... 6.0-10.0 at 800 rpm
Ignition Timing (LPG), deg BTDC ............... 10.0-12.0 at 800 rpm
Drive Belt Deflection Tension, in (mm) ............... 0.25-0.375 (6.4-9.5)
Intake Valve Clearance (Cold), in (mm) ............... 0.006 (0.15)
Exhaust Valve Clearance (Cold), in (mm) ............... 0.012 (0.30)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 5W-30
API Service Classifications ......................... SG, SH, SJ, or SL
Engine Oil Capacity (Base Pan), qt (L) ............... 3.5 (3.3)
Engine Oil Capacity with Filter Change, qt (L) ............... 4.0 (3.8)
Cooling System Total Capacity, gal (L) ............... 1.5 (5.7)

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 200 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 Inner Diameter, in (mm) ............... 2.9115-2.9119 (73.952-73.962)
Cylinder Bore Out Of Round, in (mm) ............... 0.0015 (0.038)
Cylinder Bore Taper Service Limit, in (mm) ............... 0.002 (0.051)
Cylinder Block Deck Surface Warp Flatness, in (mm) ............... 0.003 (0.076)
Cylinder Head Base Face Warp Flatness, in (mm) ............... 0.003 (0.076)
Crankshaft Main Journal Diameter, in (mm) ............... 2.1252-2.1260 (53.980-54.000)
Crankpin Journal Diameter, in (mm) ............... 1.6925-1.6933 (42.990-43.010)
Crankshaft Main Bearing Shell Thickness, in (mm) ............... 0.0718 (1.824)
Crankshaft End Play, in (mm) ............... 0.003-0.007 (0.076-0.178)
Connecting Rod Big End Bore I.D, in (mm) ............... 1.8362-1.8370 (46.640-46.660)
Connecting Rod Small End Bushing I.D , in (mm) ............... 0.8124-0.8130 (20.635-20.650)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0008-0.0022 (0.020-0.056)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0006-0.0020 (0.015-0.051)
Piston To Cylinder Bore Clearance, in (mm) ............... 0.0018-0.0026 (0.046-0.066)
Piston Pin To Con Rod Bushing Clearance, in (mm) ............... 0.0003-0.0005 (0.008-0.013)
Piston Pin To Piston Pin Bore Clearance, in (mm) ............... 0.0001-0.0003 (0.003-0.008) tight cold fit
Piston Pin Diameter, in (mm) ............... 0.8120-0.8123 (20.625-20.632)
Top Ring Groove Width, in (mm) ............... 0.078 (1.98)
Second Ring Groove Width, in (mm) ............... 0.078 (1.98)
Oil Ring Groove Width, in (mm) ............... 0.156 (3.96)
Top Ring Groove Side Clearance, in (mm) ............... 0.0016-0.0036 (0.041-0.091)
Second Ring Groove Side Clearance, in (mm) ............... 0.0016-0.0036 (0.041-0.091)
Oil Ring Groove Side Clearance, in (mm) ............... 0.0018-0.0038 (0.046-0.096)
Top Ring End Gap, in (mm) ............... 0.009-0.014 (0.229-0.356)
Second Ring End Gap, in (mm) ............... 0.009-0.014 (0.229-0.356)
Oil Ring End Gap, in (mm) ............... 0.011-0.031 (0.279-0.787)
Intake Valve Head Outer Diameter, in (mm) ............... 1.412 (35.86)
Exhaust Valve Head Outer Diameter, in (mm) ............... 1.135 (28.83)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.311-0.312 (7.90-7.92)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.310-0.311 (7.87-7.89)
Intake Valve Stem To Guide Clearance, in (mm) ............... 0.0010-0.0025 (0.025-0.064)
Exhaust Valve Stem To Guide Clearance, in (mm) ............... 0.0020-0.0035 (0.051-0.089)
Valve Stem Guide Bore Inner Diameter, in (mm) ............... 0.313-0.314 (7.95-7.98)
Valve Spring Free Length, in (mm) ............... 1.782 (45.26)
Valve Seat Angle, deg ............... 45.0
Valve Margin Thickness, in (mm) ............... 0.031 (0.79)
Valve Recess Depth , in (mm) ............... 0.035-0.045 (0.89-1.14)
Camshaft Bearing Journal Diameter (Front), in (mm) ............... 1.686-1.687 (42.82-42.85)
Camshaft Bearing Journal Diameter (Center), in (mm) ............... 1.656-1.657 (42.06-42.09)
Camshaft Bearing Journal Diameter (Rear), in (mm) ............... 1.626-1.627 (41.30-41.33)
Camshaft Journal Bearing Clearance, in (mm) ............... 0.001-0.003 (0.025-0.076)
Cam Lobe Lift (Intake), in (mm) ............... 0.285 (7.24)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.285 (7.24)
Camshaft End Play, in (mm) ............... 0.002-0.006 (0.051-0.152)
Rocker Arm Shaft To Bushing Clearance, in (mm) ............... 0.0006-0.0021 (0.015-0.053)

Tightening Torques

Cylinder Head Bolt (1-Stage), lb-ft (Nm) ............... 30.0 (40.7)
Cylinder Head Bolt (2-Stage), lb-ft (Nm) ............... 50.0 (67.8)
Cylinder Head Bolt (3-Stage), lb-ft (Nm) ............... 65.0-70.0 (88.1-94.9)
Crankshaft Main Bearing Cap Bolt lb-ft (Nm) ............... 55.0-60.0 (74.6-81.4)
Connecting Rod Cap Retaining Nut, lb-ft (Nm) ............... 28.0-32.0 (38.0-43.4)
Flywheel To Crankshaft Mounting Bolt, lb-ft (Nm) ............... 50.0-55.0 (67.8-74.6)
Flywheel Pressure Plate Clutch Fastener, lb-ft (Nm) ............... 15.0-18.0 (20.3-24.4)
Crankshaft Front Pulley Damper Center Bolt, lb-ft (Nm) ............... 70.0-80.0 (94.9-108.5)
Camshaft Sprocket Center Bolt, lb-ft (Nm) ............... 30.0-35.0 (40.7-47.5)
Camshaft Thrust Plate Fastener Bolt, lb-ft (Nm) ............... 6.0-9.0 (8.1-12.2)
Rocker Arm Shaft Bracket Support Bolt, lb-ft (Nm) ............... 25.0-30.0 (33.9-40.7)
Valve Rocker Arm Valve Cover Bolt, lb-ft (Nm) ............... 4.0-6.0 (5.4-8.1)
Engine Oil Pan Sump Drain Plug, lb-ft (Nm) ............... 20.0-25.0 (27.1-33.9)
Engine Oil Pan Sump Perimeter Bolt, lb-ft (Nm) ............... 7.0-9.0 (9.5-12.2)
Oil Pump Housing Assembly Mounting Bolt, lb-ft (Nm) ............... 12.0-15.0 (16.3-20.3)
Intake Manifold Fuel Air Supply Mounting Bolt, lb-ft (Nm) ............... 15.0-18.0 (20.3-24.4)
Exhaust Manifold Heat Shield Nut Bolt, lb-ft (Nm) ............... 15.0-18.0 (20.3-24.4)
Timing Chain Cover Structural Case Bolt, lb-ft (Nm) ............... 7.0-9.0 (9.5-12.2)
Water Pump Assembly Housing Fastener, lb-ft (Nm) ............... 7.0-9.0 (9.5-12.2)
Thermostat Housing Outlet Flange Bolt, lb-ft (Nm) ............... 12.0-15.0 (16.3-20.3)
Spark Plug, lb-ft (Nm) ............... 15.0-20.0 (20.3-27.1)
Distributor Engine Hold Down Clamp Bolt, lb-ft (Nm) ............... 12.0-15.0 (16.3-20.3)
Fuel Pump Mechanical Mounting Stud Hex Nut, lb-ft (Nm) ............... 12.0-15.0 (16.3-20.3)
Alternator Pivot Mount Hinge Support Bolt, lb-ft (Nm) ............... 25.0-30.0 (33.9-40.7)
Alternator Adjusting Locking Tension Bolt, lb-ft (Nm) ............... 15.0-18.0 (20.3-24.4)
Starter Motor Mounting Engine Gear Bolt, lb-ft (Nm) ............... 25.0-30.0 (33.9-40.7)
Engine Mount Bracket Front Casting Block Bolt, lb-ft (Nm) ............... 35.0-40.0 (47.5-54.2)
Engine Mount Bracket Rear Flywheel Housing Bolt, lb-ft (Nm) ............... 35.0-40.0 (47.5-54.2)
Oil Pressure Sensor Sender Switch, lb-ft (Nm) ............... 8.0-12.0 (10.8-16.3)
Coolant Temperature Sensor Sender Unit, lb-ft (Nm) ............... 12.0-15.0 (16.3-20.3)
Carburetor Base Insulation Gasket Mounting Nut, lb-ft (Nm) ............... 10.0-13.0 (13.6-17.6)
Governor Housing Body Mechanical Linkage Fastener, lb-ft (Nm) ............... 8.0-11.0 (10.8-14.9)

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