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Ford DSG-423 Engine

General Technical Data

Engine Specifications

Engine Model ............... Ford DSG-423
Engine Type ............... 4-cycle inline 4-cylinder overhead cam spark-ignited multi-fuel engine
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.78 (96.0)
Engine Stroke, in (mm) ............... 3.12 (79.2)
Displacement, cu.in (L) ............... 140 (2.3)
Rated Engine Power, hp (kW) ............... 72-93 (54-69)
Rated Engine Speed, rpm ............... 2400-3000
Peak Torque ............... 118-124 lb-ft (160-168 Nm) at 1800-2200 rpm
Idle Speed ............... 700-900 rpm
Operating Speed ............... 1500-3000 rpm
Compression Ratio ............... 9.0:1-9.5:1
Firing Order ............... 1-3-4-2
Crankcase Ventilation ............... Positive crankcase ventilation valve recirculation sealed vapor track
Camshaft Drive ............... Heavy-duty reinforced fiber flexible timing belt multi-tooth sequence track
Valvetrain Type ............... Overhead cam single shaft direct bucket hydraulic lifter automation
Valves Per Cylinder ............... 2 valves per cylinder combustion chamber architecture
Main Bearings ............... 5 select alignment multi-layer journal inserts split line seating
Cylinder Block Type ............... Cast iron
Cylinder Head Type ............... Cast aluminum alloy with overhead camshaft single-structure design
Lubrication System ............... Full-pressure recirculation system with internal bypass valve
Oil Pump Type ............... Rotor-type gear-driven eccentric internal oil pump mechanism
Oil Filter Type ............... Full-flow spin-on cartridge oil filtration element canister
Cooling System ............... Liquid-cooled closed-loop thermal management pressurization architecture
Water Pump Type ............... Belt-driven centrifugal impeller fluid circulation assembly module
Air Cleaner Type ............... Dry dual-stage heavy-duty replaceable element configuration canister
Ignition System ............... Distributorless coil-on-plug electronic ignition sequence micro-controlled platform
Emissions Controls ............... Closed-loop three-way catalytic control ready oxygen sensor layout
Starting System ............... Electric starter motor engagement assembly solenoid interface gear
Electrical System ............... 12V negative ground alternating charge circuitry configuration standard
Alternator Rating ............... 60-95A

Fuel System

Fuel Injection Type ............... Electronic multi-port fuel injection pressurized sequential rail arrangement
Fuel Types Supported ............... Gasoline dry natural gas liquefied petroleum gas alternative mediums
Fuel Rail Pressure, psi (kPa) ............... 39.1-55.1 (270-380)
Fuel Injector Resistance, ohms ............... 11.0-16.0
Throttle Body Diameter, in (mm) ............... 2.16 (55.0)
Governing System ............... Electronic speed governance integrated throttle body actuator controller
Gaseous Fuel Pressure Regulator Inlet, psi (bar) ............... 70.0-311.0 (4.8-21.4)
Gaseous Fuel Regulator Delivery, psi (kPa) ............... 4.5-5.5 (31.0-37.9)
Fuel Filter Core Rating, microns ............... 10
Fuel Pump Style ............... Electric frame-mounted chassis supply high pressure inline configuration
Fuel Return Config ............... Returnless electronic pressure sensor module controlled fuel supply track
Fuel Shutoff Valve ............... Direct electronic solenoid bypass 12V automated interlock circuit valve
Air-Fuel Control ............... Mass air flow sensor integrated digital microprocessor feedback loop engine
LPG Mixer Type ............... Venturi secondary air gas proportioning differential negative pressure mixer
Natural Gas Mixer Layout ............... Concentric multi-port zero-governor gas delivery industrial mixer device
Oxygen Sensor Position ............... Exhaust manifold discharge pre-catalytic junction thread point boss

Dimensions and Weight

Overall Length, in (mm) ............... 28.3 (720)
Overall Width, in (mm) ............... 22.8 (580)
Overall Height, in (mm) ............... 29.5 (750)
Dry Weight, lbs (kg) ............... 290 (132)
Wet Weight, lbs (kg) ............... 315 (143)

Maintenance Data

Service Information

Minimum Compression Pressure, psi (kPa) ............... 150 (1034)
Oil Pressure at 2000 rpm, psi (kPa) ............... 40.0-60.0 (276-414)
Oil Pressure at Low Idle, psi (kPa) ............... 15.0-25.0 (103-172)
Radiator Cap Relief Pressure, psi (kPa) ............... 13.0-17.0 (89.6-117.2)
Coolant Thermostat Opening Start, F (C) ............... 180.0 (82.2)
Coolant Thermostat Fully Open, F (C) ............... 202.0 (94.4)
Spark Plug Type ............... Motorcraft AWSF-32PP
Spark Plug Gap, in (mm) ............... 0.042-0.046 (1.07-1.17)
Intake Valve Open Timing, BTDC ............... 18.0
Intake Valve Close Timing, ABDC ............... 58.0
Exhaust Valve Open Timing, BBDC ............... 54.0
Exhaust Valve Close Timing, ATDC ............... 22.0

Engine Oil and Coolant

Engine Oil Type .................. SAE 5W-20, 10W-30
API Service Classifications ......................... SH/SG
Engine Oil Capacity with Filter, qt (L) ............... 5.0 (4.7)
Engine Oil Capacity, Base Pan, qt (L) ............... 4.5 (4.3)
Coolant Volume Fluid Capacity, qt (L) ............... 7.4 (7.0)

Service Intervals

Change engine oil ............... Every 200 hours
Replace oil filter ............... Every 200 hours
Replace fuel filter ............... Every 500 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) ............... 3.780-3.784 (96.000-96.702)
Cylinder Bore Service Limit, in (mm) ............... 3.815 (96.90)
Cylinder Bore Out of Round, in (mm) ............... 0.0015 (0.0381)
Cylinder Bore Taper Maximum, in (mm) ............... 0.0010 (0.0254)
Crankshaft Main Journal Outer Diameter, in (mm) ............... 2.243-2.244 (56.98-57.00)
Crankpin Journal Outer Diameter, in (mm) ............... 2.046-2.047 (51.98-52.00)
Crankshaft End Play, in (mm) ............... 0.004-0.008 (0.102-0.203)
Connecting Rod Side Clearance, in (mm) ............... 0.004-0.011 (0.102-0.279)
Main Bearing Bore Inside Diameter, in (mm) ............... 2.401-2.402 (60.98-61.01)
Connecting Rod Big End Bore I.D, in (mm) ............... 2.165-2.166 (54.99-55.01)
Connecting Rod Small End Bushing Bore I.D, in (mm) ............... 0.913-0.914 (23.19-23.22)
Main Bearing Oil Clearance, in (mm) ............... 0.0008-0.0024 (0.020-0.061)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0008-0.0026 (0.020-0.066)
Piston To Cylinder Bore Clearance, in (mm) ............... 0.0014-0.0022 (0.035-0.056)
Piston Pin Outer Diameter, in (mm) ............... 0.9122-0.9125 (23.170-23.178)
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) ............... 0.0003-0.0007 (0.0076-0.0177)
Top Ring Groove Width, in (mm) ............... 0.065-0.067 (1.65-1.70)
Second Ring Groove Widthn, in (mm) ............... 0.079-0.081 (2.01-2.06)
Oil Ring Groove Width, in (mm) ............... 0.158-0.160 (4.01-4.06)
Top Ring End Gap, in (mm) ............... 0.010-0.020 (0.254-0.508)
Second Ring End Gap, in (mm) ............... 0.012-0.022 (0.304-0.558)
Oil Ring End Gap, in (mm) ............... 0.010-0.030 (0.254-0.762)
Top Ring Side Clearance, in (mm) ............... 0.002-0.004 (0.051-0.102)
Second Ring Side Clearance, in (mm) ............... 0.0016-0.0035 (0.041-0.089)
Cylinder Head Flatness Overall Surface, in (mm) ............... 0.003 (0.076)
Cylinder Block Deck Surface Flatness, in (mm) ............... 0.005 (0.127)
Intake Valve Head Diameter, in (mm) ............... 1.73 (44.0)
Exhaust Valve Head Diameter, in (mm) ............... 1.42 (36.0)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.314-0.315 (7.98-8.00)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.313-0.314 (7.95-7.97)
Intake Valve Stem To Guide Clearance, in (mm) ............... 0.0010-0.0027 (0.025-0.069)
Exhaust Valve Stem To Guide Clearance, in (mm) ............... 0.0015-0.0032 (0.038-0.081)
Valve Guide Inside Diameter, in (mm) ............... 0.316-0.317 (8.03-8.05)
Valve Seat Angle, degrees ............... 45.0
Valve Face Angle, degrees ............... 44.0
Valve Margin Thickness, in (mm) ............... 0.031 (0.079)
Valve Spring Free Length, in (mm) ............... 1.88 (47.8)
Camshaft Journal Outer Diameter, in (mm) ............... 1.771-1.772 (44.98-45.00)
Camshaft Bearing Bore Inside Diameter, in (mm) ............... 1.843-1.845 (46.81-46.86)
Camshaft Journal To Bearing Clearance, in (mm) ............... 0.0012-0.0031 (0.030-0.079)
Cam Lobe Lift (Intake), in (mm) ............... 0.237 (6.02)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.237 (6.02)
Camshaft End Play, in (mm) ............... 0.003-0.009 (0.076-0.229)

Tightening Torques

Cylinder Head Bolts (Step One), lb-ft (Nm) ............... 50.0 (68.0)
Cylinder Head Bolts (Step Two), lb-ft (Nm) ............... 65.0 (88.0)
Cylinder Head Bolts (Step Three), lb-ft (Nm) ............... 80.0 (108.0)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 85.0 (115.0)
Connecting Rod Cap Bolts, lb-ft (Nm) ............... 35.0 (47.0)
Flywheel Attachment Screws, lb-ft (Nm) ............... 56.0 (76.0)
Crankshaft Pulley Vibration Damper Bolt, lb-ft (Nm) ............... 110.0 (149.0)
Camshaft Gear Attachment Bolt, lb-ft (Nm) ............... 38.0 (52.0)
Timing Belt Tensioner Bracket Lock Fastener, lb-ft (Nm) ............... 28.0 (38.0)
Intake Manifold Fastener Screws, lb-ft (Nm) ............... 17.0 (23.0)
Exhaust Manifold Fastener Nuts, lb-ft (Nm) ............... 17.0 (23.0)
Oil Pan Outer Sheet Metal Bolts, lb-in (Nm) ............... 106.0 (12.0)
Oil Pan Corner Alignment Screws, lb-ft (Nm) ............... 15.0 (20.0)
Oil Pan Drain Plug, lb-ft (Nm) ............... 20.0 (27.0)
Valve Rocker Camshaft Cover Screws, lb-in (Nm) ............... 80.0 (9.0)
Water Pump Housing Shell Mount Bolts, lb-ft (Nm) ............... 17.0 (23.0)
Oil Pump Assembly Housing Cover Screws, lb-in (Nm) ............... 100.0 (11.3)
Oil Pump Assembly Shaft Drive Housing Bolts, lb-ft (Nm) ............... 15.0 (20.0)
Auxiliary Shaft Retention Plate Mounting Bolts, lb-in (Nm) ............... 106.0 (12.0)
Auxiliary Shaft Drive Pulley Cog Bolt, lb-ft (Nm) ............... 28.0 (38.0)
Front Crankshaft Seal Housing Bolts, lb-in (Nm) ............... 106.0 (12.0)
Rear Crankshaft Main Seal Carrier Bolts, lb-in (Nm) ............... 106.0 (12.0)
Spark Plug Core, lb-ft (Nm) ............... 15.0 (20.0)
Oxygen Sensor Core, lb-ft (Nm) ............... 30.0 (41.0)
Fuel Rail Retention Assembly Core Bolts, lb-in (Nm) ............... 88.0 (10.0)
Throttle Body Air Injection Flange Bolts, lb-in (Nm) ............... 88.0 (10.0)
Thermostat Outlet Housing Retention Fasteners, lb-ft (Nm) ............... 17.0 (23.0)
Coolant Temperature Sensor, lb-ft (Nm) ............... 12.0 (16.0)
Crankshaft Position Sensor Metal Core Screw, lb-in (Nm) ............... 80.0 (9.0)
Camshaft Position Sensor Housing Fastener, lb-in (Nm) ............... 80.0 (9.0)
Knock Vibration Sensor Monitoring Bolt, lb-ft (Nm) ............... 15.0 (20.0)
Manifold Pressure Electronic Sensor Screw, lb-in (Nm) ............... 35.0 (4.0)
Starter Motor Heavy Duty Chassis Mounting Bolts, lb-ft (Nm) ............... 25.0 (34.0)
Alternator Adjusting Arm Tension Lock Bolt, lb-ft (Nm) ............... 25.0 (34.0)
Alternator Core Main Frame Mounting Bolt, lb-ft (Nm) ............... 35.0 (47.0)
Engine Mounting Bracket Left Side Bolts, lb-ft (Nm) ............... 45.0 (61.0)
Engine Mounting Bracket Right Side Bolts, lb-ft (Nm) ............... 45.0 (61.0)
Flywheel Housing Shell Bolts, lb-ft (Nm) ............... 35.0 (47.0)
Timing Belt Inner Backing Plate Screws, lb-in (Nm) ............... 80.0 (9.0)
Timing Belt Protection Cover Plastic Fasteners, lb-in (Nm) ............... 60.0 (6.8)
PCV Valve Threaded Retention Core Connection, lb-ft (Nm) ............... 10.0 (13.6)
Oil Pressure Sensor Indicator Switch, lb-ft (Nm) ............... 12.0 (16.0)
Fuel Injector Fuel Rail DeliveryRetainers, lb-in (Nm) ............... 35.0 (4.0)
Ignition Coil Pack Assembly Mounting Frame Screws, lb-in (Nm) ............... 53.0 (6.0)
Air Cleaner Housing Canister Chassis Mounting Bolts, lb-ft (Nm) ............... 15.0 (20.0)
Exhaust Pipe Extension To Collector Flange Coupling Nuts, lb-ft (Nm) ............... 25.0 (34.0)
Gaseous Fuel Secondary Mixer Intake Top Mounting Nuts, lb-in (Nm) ............... 88.0 (10.0)
LPG Regulator Internal Liquid Chamber Screws, lb-in (Nm) ............... 45.0 (5.1)
Natural Gas Fuel Inlet Shutoff Block Solenoid Nut, lb-in (Nm) ............... 30.0 (3.4)
Crankcase Breathing Oil Separator Chamber Screws, lb-in (Nm) ............... 80.0 (9.0)
Water Pump Pulley Face Extension Bolts, lb-ft (Nm) ............... 17.0 (23.0)
Crankshaft Front Auxiliary Drive Pulley Screws, lb-ft (Nm) ............... 35.0 (47.0)
Cylinder Head Core Sand Hole Plugs, lb-ft (Nm) ............... 20.0 (27.0)
Oil Gallery End Face Sealed Access Plugs, lb-ft (Nm) ............... 15.0 (20.0)
Distributor Blanking Plug Holding Clamp Down Bolt, lb-ft (Nm) ............... 15.0 (20.0)
Electronic Engine Control Module Mounting Screws, lb-in (Nm) ............... 35.0 (4.0)
Chassis Ground Cable Main Engine Block Connection, lb-ft (Nm) ............... 25.0 (34.0)
Oil Filter Cooler Adapter Center Thread Spindle Fitting, lb-ft (Nm) ............... 35.0 (47.0)
Heater Core Fluid Return Line Fitting Block Port, lb-ft (Nm) ............... 12.0 (16.0)
Flywheel Inspection Cover Dust Shield Screws, lb-in (Nm) ............... 60.0 (6.8)
Dipstick Tube Insertion Base Support Bolt, lb-in (Nm) ............... 106.0 (12.0)

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