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Ford 2715E Engine

The Ford 2715E is an industrial and marine heavy-duty base engine belonging to the Ford 2700 range. Known for its exceptional reliability, low-RPM torque delivery, and purely mechanical operation, this naturally aspirated engine has been widely utilized in row-crop tractors, commercial industrial equipment, and extensive marine conversions (most notably by Lehman Power Corporation as the Ford Lehman 120). Constructed with a heavy cast-iron block and structural simplicity, it features a highly durable design capable of operating for tens of thousands of hours when properly maintained.

The engine employs an overhead vertical valve (OHV) layout operating via a gear-driven camshaft, pushrods, and a traditional rocker assembly. It utilizes 2 valves per cylinder (12 valves total) with 30-degree valve seats and phosphate-coated stems. The entire valve mechanism is housed under a pressed steel rocker cover equipped with an integrated breather system. Replaceable valve guides and hard seat inserts are standard to facilitate heavy mechanical loads. The block configuration is an inline 6-cylinder layout with a total displacement of 6.22 Liters (380 cu.in). Cylinder Bore: 107.0 mm (4.21 inches). Piston Stroke: 115.0 mm (4.53 inches).

Fuel System: This engine features a 4-stroke direct-injection system where fuel is injected directly into the combustion space. The top of each aluminum alloy split-skirt piston incorporates a specialized toroidal combustion chamber designed to generate optimal air-fuel swirl. Fuel delivery is handled by a camshaft-driven mechanical lift pump that pulls fuel from the storage tank through primary filtration and water separation units. Pressurized delivery to individual cylinders is timed and metered through a fully mechanical multi-plunger inline injection pump connected to multi-hole mechanical injectors.

Lubrication is managed via a full-pressure, wet-sump system driven by a gear-type oil pump running directly off the main camshaft. The system draws oil from the pan through a pickup screen and routes it to a spin-on full-flow oil filter assembly. For heavy-duty marine and industrial deployments, the lubrication system relies on an integrated engine oil heat exchanger (oil cooler) to regulate system temperatures and prevent thermal breakdown under prolonged load.

The cooling architecture relies on a liquid-cooled framework using an engine-driven centrifugal water pump to circulate coolant through the cast iron block and cylinder head jacket. In industrial configurations, a standard radiator system is utilized; whereas in marine roles, a closed freshwater heat exchanger system is implemented. This incorporates an expansion tank and utilizes raw-water marine pumps to cool the primary freshwater loop. Exhaust manifolds can be either separate dry units or fully water-cooled jackets depending on application safety requirements.

General Technical Data

Engine Specifications

Engine Model ............... Ford 2715E
Engine Series ............... Dorset 2700 Range
Engine Configuration ............... 4-stroke inline 6-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 6
Cylinder Arrangement ............... Vertical in-line
Aspiration Type ............... Naturally aspirated
Bore Diameter ............... 107.0 mm (4.220 in)
Piston Stroke Length ............... 115.0 mm (4.524 in)
Total Displacement ............... 6.22 L (380.0 cu.in)
Compression Ratio ............... 16.0:1
Firing Order ............... 1-5-3-6-2-4
Rotation Direction ............... Counterclockwise looking at flywheel end
Rated Engine Power ............... 89.5 kW (120.0 hp)
Rated Engine Speed ............... 2500 rpm
Maximum Torque ............... 376.0 Nm (280.0 lb-ft)
Maximum Torque Speed ............... 1600 rpm
Idle Speed Low ............... 650 rpm
Idle Speed High ............... 700 rpm
Max No-Load Speed ............... 2750 rpm
Combustion Chamber ............... Direct injection
Cylinder Block Material ............... High-grade cast iron alloy
Cylinder Head Material ............... Monobloc cast iron alloy
Lubrication System ............... Forced pressure feed with full-flow filtration
Oil Filter Element Type ............... Full-flow spin-on canister
Oil Pump Drive Method ............... Concentric gear drive from crankshaft
Oil Pump Type ............... Rotor type gear-driven
Cooling System ............... Liquid circulation with thermostat control
Water Pump Type ............... Centrifugal belt-driven assembly
Air Cleaner Type ............... Heavy-duty oil bath or dry element type
Starting System ............... Axial type electric starter motor
Electrical System ............... 12V or 24V

Fuel System

Fuel Injection Pump Model ............... Simms Minimec mechanical inline
Fuel Injection Pump Drive Type ............... Gear-driven from camshaft gear
Governor Type ............... Mechanical centrifugal mechanical lift type
Fuel Injection Timing ............... 23.0 degrees BTDC
Fuel Lift Pump Type ............... Mechanical plunger type with hand primer
Fuel Lift Pump Delivery Pressure ............... 0.41-0.69 bar (6.0-10.0 psi)
Fuel Injector Nozzle Holder Type ............... Multi-hole multi-spray nozzle
Fuel Injector Nozzle Holes Number ............... 4
Fuel Injector Nozzle Hole Diameter ............... 0.25 mm (0.010 in)
Fuel Injector Opening Pressure, New ............... 185.0 bar (2683.0 psi)
Fuel Injector Opening Pressure, Service ............... 170.0 bar (2465.0 psi)
Fuel Filter Assembly Type ............... Dual element spin-on paper cartridge
Maximum Fuel Return Flow Rate ............... 45.0 L/h (11.9 gal/h)
Maximum Fuel Temperature Inlet ............... 60.0 C (140.0 F)
Fuel Injection Pipe Outer Diameter ............... 6.0 mm (0.236 in)
Fuel Injection Pipe Inner Diameter ............... 2.0 mm (0.078 in)
Fuel Leak-off Rail Pipe Material ............... Steel seamless construction

Dimensions and Weight

Overall Length ............... 1195 mm (47 in)
Overall Width ............... 710 mm (28 in)
Overall Height ............... 915 mm (36 in)
Dry Weight ............... 468 kg (1030 lbs)
Wet Weight ............... 495 kg (1092 lbs)

Maintenance Data

Service Information

Compression Pressure, Engine Cranking ............... 24.1-27.6 bar (350.0-400.0 psi)
Compression Variation Between Cylinders ............... 3.45 bar (50.0 psi)
Oil Pressure at Rated Speed ............... 2.76-4.14 bar (40.0-60.0 psi)
Oil Pressure at Idle Speed ............... 1.03 bar (15.0 psi)
Oil Pressure Relief Valve ............... 4.48 bar (65.0 psi)
Cooling System Thermostat Opening Starts ............... 74.0 C (165.0 F)
Cooling System Thermostat Fully Open ............... 87.0 C (188.0 F)
Cooling System Pressure Cap ............... 0.48-0.69 bar (7.0-10.0 psi)
Intake Valve Clearance, Cold ............... 0.381 mm (0.0150 in)
Exhaust Valve Clearance, Cold ............... 0.381 mm (0.0150 in)

Engine Oil and Coolant

Engine Oil Type .................. SAE 30, SAE 20W-50, SAE 15W-40
API Service Classifications ......................... CC or CD
Engine Oil Capacity, High Sump ............... 17.2 L (4.54 gal)
Engine Oil Capacity, Shallow Sump ............... 13.5 L (3.56 gal)
Cooling System Fluid Capacity ............... 22.7 L (6.0 gal)

Service Intervals

Change oil and filter ............... Every 200 hours
Inspect air cleaner ............... Every 50 hours
Replace air cleaner ............... Every 500 hours
Replace fuel filter ............... Every 400 hours
Valve clearance adjustment ............... Every 400 hours
Fuel system inspection ............... Every 600 hours
Change coolant ............... Every 1000 hours
Compression test ............... Every 600 hours
Belt inspection ............... Every service cycle

Service Specifications

Cylinder Bore Inner Diameter ............... 110.211-110.236 mm (4.3390-4.3400 in)
Cylinder Liner Outer Diameter ............... 110.287-110.312 mm (4.3420-4.3430 in)
Cylinder Liner Taper Maximum ............... 0.038 mm (0.0015 in)
Cylinder Block Top Surface Flatness ............... 0.051 mm (0.0020 in)
Main Bearing Bore Inner Diameter ............... 81.331-81.356 mm (3.2020-3.2030 in)
Main Bearing Journal Outer Diameter ............... 76.162-76.187 mm (2.9985-2.9995 in)
Main Bearing Journal Clearance ............... 0.152 mm (0.0060 in)
Crankpin Journal Outer Diameter ............... 63.462-63.487 mm (2.4985-2.4995 in)
Crankshaft End Play ............... 0.051-0.203 mm (0.0020-0.0080 in)
Crankshaft Journal Taper Maximum ............... 0.013 mm (0.0005 in)
Connecting Rod Bearing Clearance ............... 0.046-0.097 mm (0.0018-0.0038 in)
Connecting Rod Small End Bore Inner Diameter ............... 39.637-39.662 mm (1.5605-1.5615 in)
Connecting Rod Small End Bushing Inner Diameter ............... 36.142-36.154 mm (1.4229-1.4234 in)
Connecting Rod Big End Bore Inner Diameter ............... 67.208-67.234 mm (2.6460-2.6470 in)
Connecting Rod Big End Side Clearance ............... 0.178-0.330 mm (0.0070-0.0130 in)
Connecting Rod Bushing to Piston Pin Clearance ............... 0.015-0.033 mm (0.0006-0.0013 in)
Piston Skirt Outer Diamete ............... 106.845-106.871 mm (4.2065-4.2075 in)
Piston Clearance in Cylinder Liner ............... 0.140-0.168 mm (0.0055-0.0066 in)
Piston Pin Bore Inner Diameter ............... 36.124-36.132 mm (1.4222-1.4225 in)
Piston Pin Outer Diameter ............... 36.114-36.121 mm (1.4218-1.4221 in)
Piston Pin Fit in Piston Boss Clearance ............... 0.003-0.018 mm (0.0001-0.0007 in)
Top Ring Side Clearance ............... 0.076-0.127 mm (0.0030-0.0050 in)
Second Ring Side Clearance ............... 0.051-0.102 mm (0.0020-0.0040 in)
Third Ring Side Clearance ............... 0.051-0.102 mm (0.0020-0.0040 in)
Oil Ring Side Clearance ............... 0.038-0.089 mm (0.0015-0.0035 in)
Top Ring End Gap ............... 0.406-0.559 mm (0.0160-0.0220 in)
Second Ring End Gap ............... 0.356-0.508 mm (0.0140-0.020 in)
Third Ring End Gap ............... 0.356-0.508 mm (0.0140-0.020 in)
Oil Ring End Gap ............... 0.356-0.508 mm (0.0140-0.020 in)
Cylinder Head Minimum Surface Thickness ............... 109.47-109.73 mm (4.310-4.320 in)
Cylinder Head Distortion, Maximum ............... 0.076 mm (0.0030 in)
Intake Valve Stem Outer Diameter ............... 9.462-9.487 mm (0.3725-0.3735 in)
Exhaust Valve Stem Outer Diameter ............... 9.411-9.436 mm (0.3705-0.3715 in)
Intake Valve Guide Internal Diameter ............... 9.512-9.538 mm (0.3745-0.3755 in)
Exhaust Valve Guide Internal Diameter ............... 9.512-9.538 mm (0.3745-0.3755 in)
Intake Valve Stem to Guide Clearance ............... 0.025-0.076 mm (0.0010-0.0030 in)
Exhaust Valve Stem to Guide Clearance ............... 0.076-0.127 mm (0.0030-0.0050 in)
Valve Face Angle ............... 45 degrees
Valve Seat Angle ............... 45 degrees
Valve Spring Free Length ............... 49.530 mm (1.950 in)
Camshaft Journal Outer Diameter Front) ............... 53.912-53.937 mm (2.1225-2.1235 in)
Camshaft Journal Outer Diameter (Center Front) ............... 53.150-53.175 mm (2.0925-2.0935 in)
Camshaft Journal Outer Diameter (Center Rear) ............... 52.388-52.413 mm (2.0625-2.0635 in)
Camshaft Journal Outer Diameter (Rear) ............... 51.626-51.651 mm (2.0325-2.0335 in)
Camshaft Bearing Bore Inner Diameter ............... 57.150-57.175 mm (2.2500-2.2510 in)
Camshaft Running Clearance ............... 0.051-0.102 mm (0.0020-0.0040 in)
Camshaft End Play ............... 0.051-0.178 mm (0.0020-0.0070 in)
Cam Lobe Lift (Intake) ............... 7.214 mm (0.2840 in)
Cam Lobe Lift (Exhaust) ............... 7.214 mm (0.2840 in)
Rocker Shaft Outer Diameter ............... 19.012-19.037 mm (0.7485-0.7495 in)
Rocker Arm Bushing Internal Diameter ............... 19.063-19.088 mm (0.7505-0.7515 in)
Rocker Arm Clearance on Rocker Shaft ............... 0.025-0.076 mm (0.0010-0.0030 in)
Tappet Lifter Body Outer Diameter ............... 14.237-14.262 mm (0.5605-0.5615 in)
Tappet Bore Internal Diameter ............... 14.300-14.326 mm (0.5630-0.5640 in)
Tappet Body Clearance in Cylinder Block ............... 0.038-0.089 mm (0.0015-0.0035 in)
Timing Gear Backlash Crankshaft to Camshaft ............... 0.076-0.152 mm (0.0030-0.0060 in)
Timing Gear Backlash Camshaft to Injection Pump ............... 0.076-0.178 mm (0.0030-0.0070 in)
Timing Gear Backlash Idler Gear Assembly ............... 0.051-0.127 mm (0.0020-0.0050 in)
Idler Gear Bushing Internal Diameter ............... 41.275-41.300 mm (1.6250-1.6260 in)
Idler Gear Spindle Shaft Outer Diameter ............... 41.212-41.237 mm (1.6225-1.6235 in)

Tightening Torques

Cylinder Head Bolts (Stage One) ............... 40.7 Nm (30.0 lb-ft)
Cylinder Head Bolts (Stage Two) ............... 81.3 Nm (60.0 lb-ft)
Cylinder Head Bolts (Stage Three) ............... 122.0 Nm (90.0 lb-ft)
Cylinder Head Bolts (Stage Four) ............... 142.4 Nm (105.0 lb-ft)
Main Bearing Cap Bolts ............... 155.9 Nm (115.0 lb-ft)
Connecting Rod Cap Nuts ............... 101.7 Nm (75.0 lb-ft)
Flywheel Retaining Bolts to Crankshaft Flange ............... 108.5 Nm (80.0 lb-ft)
Crankshaft Pulley Damper Center Bolt ............... 271.2 Nm (200.0 lb-ft)
Camshaft Thrust Plate Fastener Bolts ............... 24.4 Nm (18.0 lb-ft)
Camshaft Timing Gear Retaining Center Nut ............... 149.1 Nm (110.0 lb-ft)
Timing Assembly Front Housing to Block Bolts ............... 24.4 Nm (18.0 lb-ft)
Timing Front Housing Cover Assembly Bolts ............... 13.6 Nm (10.0 lb-ft)
Idler Gear Spindle Shaft Retaining Plate Bolts ............... 44.7 Nm (33.0 lb-ft)
Rocker Shaft Support Bracket Retaining Bolts ............... 40.7 Nm (30.0 lb-ft)
Engine Oil Sump Oil Pan Drain Plug ............... 47.5 Nm (35.0 lb-ft)
Engine Oil Sump Securing Bolts ............... 19.0 Nm (14.0 lb-ft)
Rocker Arm Securing Cover Valve Cover Nuts ............... 10.8 Nm (8.0 lb-ft)
Intake Manifold Securing Port Flange Bolts ............... 24.4 Nm (18.0 lb-ft)
Exhaust Manifold Securing Port Flange Nuts ............... 24.4 Nm (18.0 lb-ft)
Fuel Injection Pump Drive Gear Retaining Nut ............... 61.0 Nm (45.0 lb-ft)
Fuel Injection Pump Body to Mounting Bolts ............... 24.4 Nm (18.0 lb-ft)
Fuel Injector Nozzle Assembly Clamp Nuts ............... 20.3 Nm (15.0 lb-ft)
Fuel Injection High Pressure Pipe Union Nuts ............... 24.4 Nm (18.0 lb-ft)
Fuel Lift Pump Body Securing Retaining Bolts ............... 24.4 Nm (18.0 lb-ft)
Engine Oil Pump Securing Bolts ............... 24.4 Nm (18.0 lb-ft)
Engine Oil Pressure Relief Valve Cap Plug ............... 47.5 Nm (35.0 lb-ft)
Water Pump Housing Core Body Bolts ............... 24.4 Nm (18.0 lb-ft)
Cooling System Water Thermostat Housing Bolts ............... 24.4 Nm (18.0 lb-ft)
Engine Starter Motor Flange Assembly Mounting Bolts ............... 47.5 Nm (35.0 lb-ft)
Alternator Charging Bracket Pivoting Support Bolts ............... 40.7 Nm (30.0 lb-ft)
Alternator Link Adjusting Locking Tension Bolt ............... 24.4 Nm (18.0 lb-ft)
Engine Sump Dipstick Tube Lock Nut ............... 20.3 Nm (15.0 lb-ft)
Oil Filter Housing Base Casting Securing Bolts ............... 24.4 Nm (18.0 lb-ft)
Oil Cooler Assembly Flange Mount Bolts ............... 24.4 Nm (18.0 lb-ft)
Crankcase Breathing Unit Valve Cover Ventilation Bolt ............... 10.8 Nm (8.0 lb-ft)
Flywheel Housing Shell Structural Perimeter Bolts ............... 47.5 Nm (35.0 lb-ft)
Exhaust Outlet Extension Adapter Bolts ............... 40.7 Nm (30.0 lb-ft)
Water Inlet Connection Flange Thermostat Bolts ............... 24.4 Nm (18.0 lb-ft)
Glow Plug Connection Threads ............... 20.3 Nm (15.0 lb-ft)
Air Intake Silencer Cleaner Housing Nut ............... 13.6 Nm (10.0 lb-ft)

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