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Ford 2701E Engine

The Ford 2701E is a 4-cylinder, 4-stroke, inline direct-injection diesel engine belonging to the Ford 2700 Dorset series. Developed in the UK during the 1970s, it was widely engineered for industrial power, agricultural applications, and heavy marine setups (often base-adapted as Lehman or Sabre units). The unit features a rugged cast-iron block design using either parent bores or dry-type cromard liners, making it exceptionally reliable and highly valued for rebuilds.

The cylinder head utilizes an overhead vertical valve setup. The system contains two valves per cylinder operated by a gear-driven camshaft via pushrods and rocker assemblies. The valves are machined with 30-degree seats and feature phosphate-coated stems to reduce friction and wear. The assembly is constructed with replaceable valve guides and hard seat inserts. Bore: 105 mm (4.125 inches). Stroke: 115 mm (4.524 inches). Total Displacement: 3.964 Liters (242 cubic inches).

Fuel System: The fuel architecture relies on a direct-injection design operating with toroidal combustion chambers cast directly into the aluminium alloy split-skirt piston crowns. A mechanical lift pump, driven by the engine camshaft, draws fuel from the supply tank and forces it through primary filtration stages. High pressure is generated by a mechanical inline injection pump timed to the engine gears, forcing precisely metered fuel through multi-hole injectors directly into each cylinder.

Lubrication is managed by a high-pressure force-feed system. An internal oil pump, driven directly via gears from the central camshaft, draws oil from the pan through a pickup strainer. Pressurized oil passes through a full-flow, spin-on oil filter element before channeling into the primary oil gallery to feed the main bearings, connecting rod journals, and overhead rocker shaft assembly.

The cooling circuit is a liquid-cooled, closed-loop system managed by a belt-driven centrifugal water pump. Coolant is pumped through internal block jackets and the cylinder head to control combustion chamber temperatures. Temperature regulation is maintained by a wax-element thermostat that controls coolant bypass directly back to the pump or through an external heat exchanger/radiator setup. Marine configurations typically utilize a raw water heat exchanger paired with water-cooled exhaust manifolds.

General Technical Data

Engine Specifications

Engine Model ............... Ford 2701E
Engine Series ............... Dorset 2700 Range
Engine Type ............... 4-cycle inline 4-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... Vertical in-line
Engine Bore, in (mm) ............... 4.125 (104.77)
Engine Stroke, in (mm) ............... 4.524 (114.80)
Displacement, cu.in (L) ............... 241 (3.964)
Rated Engine Power, hp (kW) ............... 71 (53)
Rated Engine Speed, rpm ............... 2500
Peak Torque, lb-ft (Nm) ............... 170 (228) at 1700 rpm
Idle Speed, rpm ............... 600-650
Max No-Load Speed, rpm ............... 2750
Aspiration Type ............... Naturally aspirated
Compression Ratio ............... 16.5:1
Firing Order ............... 1-3-4-2
Direction of Rotation ............... Clockwise viewed from front
Cylinder Block Type ............... Monoblock cast iron with dry liners
Cylinder Head Type ............... Single piece cast iron cross-flow
Combustion Chamber Type ............... Direct injection
Lubrication System ............... Forced feed full-pressure
Oil Pump Type ............... Eccentric rotor gear-driven from camshaft
Oil Filter Type ............... Full-flow spin-on cartridge
Cooling System ............... Thermostatically controlled liquid bypass
Water Pump Type ............... Centrifugal belt-driven from crankshaft
Air Cleaner Type ............... Heavy-duty oil bath or dry element
Starting System ............... Electric starter motor
Electrical System, V ............... 12
Alternator Output, A ............... 35 or 55

Fuel System

Fuel Injection Pump Type ............... Simms Minimec mechanical inline plunger
Governor Type ............... Mechanical centrifugal type integrated with pump
Fuel Feed Pump Type ............... Plunger type mechanical lift pump
Fuel Lift Pump Drive ............... Camshaft eccentric lobe operated
Fuel Lift Pump Pressure, psi (bar) ............... 5.0-8.0 (0.34-0.55)
Fuel Filter Type ............... Dual element paper cartridge with sedimenter
Fuel Injector Nozzle Type ............... Multi-hole spray design nozzles
Number of Injection Nozzle Holes ............... 4
Nozzle Hole Diameter, in (mm) ............... 0.010(0.25)
Injection Opening Pressure, atm (bar) ............... 175 (177.3)
High Pressure Fuel Pipes Inner Diameter, in (mm) ............... 0.078 (2.0)
High Pressure Fuel Pipes Outer Diameter, in (mm) ............... 0.236 (6.0)
Fuel Injection Timing, deg BTDC ............... 23
Fuel Tank Return Line Diameter, in (mm) ............... 0.25 (6.35)
Fuel Injection Pipe Length, in (mm) ............... 18.5 (470.0)
Plunger Diameter, in (mm) ............... 0.295 (7.5)
Plunger Helix Type ............... Standard upper straight cut helix
Delivery Valve Type ............... Anti-dribble piston design valve
Maximum Governor Cut-off Speed, rpm ............... 2650
Minimum Governor Idle Speed, rpm ............... 550

Dimensions and Weight

Overall Length, in (mm) ............... 31.2 (790)
Overall Width, in (mm) ............... 24.5 (620)
Overall Height, in (mm) ............... 36.8 (935)
Dry Weight, lbs (kg) ............... 745 (338)
Wet Weight, lbs (kg) ............... 790 (358)

Maintenance Data

Service Information

Compression Pressure, Minimum, psi (bar) ............... 400 (27.6)
Maximum Variation Between Cylinders, psi (bar) ............... 30 (2.06)
Engine Crankcase Oil Pressure, psi (bar) ............... 40-60 (2.75-4.13)
Minimum Oil Pressure at Idle, psi (bar) ............... 15 (1.03)
Maximum Oil Temperature, F (C) ............... 225 (107)
Thermostat Opening Temperature, F (C) ............... 172 (78)
Thermostat Full Open Temperature, F (C) ............... 198 (92)
Maximum Coolant Temperature, F (C) ............... 212 (100)
Drive Belt Tension Deflection, in (mm) ............... 0.50 (12.7)
Intake Valve Clearance, Cold, in (mm) ............... 0.012 (0.30)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.015 (0.38)

Engine Oil and Coolant

Engine Oil Type .................. SAE 30, SAE 10W, or SAE 20W
API Service Classifications ......................... CC or CD
Engine Oil Capacity with Filter, qt (L) ............... 8.5 (8.0)
Engine Oil Capacity without Filter, qt (L) ............... 7.4 (7.0)
Cooling System Fluid Capacity, qt (L) ............... 12.7 (12.0)

Service Intervals

Change oil and filter ............... Every 150 hours
Inspect air cleaner ............... Every 50 hours
Replace air cleaner ............... Every 600 hours
Replace fuel filter ............... Every 300 hours
Valve clearance adjustment ............... Every 600 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 Diameter, in (mm) ............... 4.1250-4.1260 (104.775-104.800)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 0.006 (0.152)
Cylinder Bore Maximum Taper, in (mm) ............... 0.0020 (0.051)
Cylinder Liner Outer Diameter, in (mm) ............... 4.2855-4.2860 (108.852-108.864)
Cylinder Liner Wall Thickness, in (mm) ............... 0.0815 (2.07)
Cylinder Liner Overall Length, in (mm) ............... 8.610 (218.69)
Cylinder Block Parent Bore Diameter, in (mm) ............... 4.2830-4.2840 (108.788-108.814)
Connecting Rod Small End Bushing I.D, in (mm) ............... 1.3756-1.3762 (34.940-34.955)
Connecting Rod Big End Bore Diameter, in (mm) ............... 2.6250-2.6255 (66.675-66.688)
Connecting Rod Journal Standard Diameter, in (mm) ............... 2.4990-2.5000 (63.475-63.500)
Connecting Rod Bearing Shell Thickness, in (mm) ............... 0.0615-0.0620 (1.562-1.575)
Connecting Rod Bearing Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Connecting Rod End Play, in (mm) ............... 0.006-0.011 (0.15-0.28)
Connecting Rod Center Distance, in (mm) ............... 7.50 (190.50)
Connecting Rod Journal Length, in (mm) ............... 1.250 (31.75)
Main Journal Standard Diameter, in (mm) ............... 2.9990-3.0000 (76.175-76.200)
Main Bearing Housing Bore in Block, in (mm) ............... 3.1660-3.1665 (80.416-80.429)
Main Bearing Shell Thickness, in (mm) ............... 0.0820-0.0825 (2.083-2.096)
Main Bearing Radial Clearance, in (mm) ............... 0.0020-0.0040 (0.051-0.102)
Main Bearing Journal Length, in (mm) ............... 1.375 (34.93)
Crankshaft End Play, in (mm) ............... 0.003-0.011 (0.076-0.279)
Crankshaft Journal Maximum Taper, in (mm) ............... 0.0005 (0.013)
Crankshaft Runout Main Journals, in (mm) ............... 0.0015 (0.038)
Piston Skirt Diameter, in (mm) ............... 4.1205-4.1215 (104.661-104.686)
Piston Length, in (mm) ............... 4.375 (111.12)
Piston to Cylinder Liner Clearance, in (mm) ............... 0.0035-0.0055 (0.089-0.140)
Piston Pin Bore Diameter in Piston, in (mm) ............... 1.3751-1.3753 (34.928-34.933)
Piston Pin Outer Diameter, in (mm) ............... 1.3748-1.3750 (34.920-34.925)
Piston Pin to Small End Bushing Clearance, in (mm) ............... 0.0006-0.0014 (0.015-0.036)
Piston Pin Length, in (mm) ............... 3.375 (85.73)
Top Ring Groove Width, in (mm) ............... 0.0957-0.0967 (2.431-2.456)
Second Ring Groove Width, in (mm) ............... 0.0947-0.0957 (2.405-2.431)
Oil Ring Groove Width, in (mm) ............... 0.1885-0.1895 (4.788-4.813)
Top Ring Side Clearance, in (mm) ............... 0.0025-0.0045 (0.064-0.114)
Second Ring Side Clearance, in (mm) ............... 0.0020-0.0040 (0.051-0.102)
Oil Ring Side Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Top Ring End Gap, in (mm) ............... 0.011-0.016 (0.28-0.41)
Second Ring End Gap, in (mm) ............... 0.009-0.014 (0.23-0.36)
Oil Ring End Gap, in (mm) ............... 0.011-0.016 (0.28-0.41)
Cylinder Head Flatness Max Distortion, in (mm) ............... 0.003 (0.076)
Cylinder Head Valve Guide Bore, in (mm) ............... 0.5615-0.5625 (14.262-14.288)
Intake Valve Stem Length, in (mm) ............... 5.742 (145.85)
Exhaust Valve Stem Length, in (mm) ............... 5.742 (145.85)
Intake Valve Head Diameter, in (mm) ............... 1.807 (45.90)
Exhaust Valve Head Diameter, in (mm) ............... 1.515 (38.48)
Intake Valve Stem Diameter, in (mm) ............... 0.3715-0.3725 (9.436-9.462)
Exhaust Valve Stem Diameter, in (mm) ............... 0.3705-0.3715 (9.411-9.436)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0025-0.0045 (0.064-0.114)
Intake Valve Face Angle, degrees ............... 30
Exhaust Valve Face Angle, degrees ............... 45
Intake Valve Seat Angle, degrees ............... 30
Exhaust Valve Seat Angle, degrees ............... 45
Valve Stem Guide Bore, in (mm) ............... 0.3740-0.3750 (9.500-9.525)
Valve Guide Outer Diameter, in (mm) ............... 0.5635-0.5640 (14.313-14.326)
Valve Spring Free Length, in (mm) ............... 1.95 (49.5)
Camshaft Journal Diameter (Front), in (mm) ............... 2.1225-2.1235 (53.912-53.937)
Camshaft Journal Diameter (Center), in (mm) ............... 2.0600-2.0610 (52.324-52.349)
Camshaft Journal Diameter (Rear), in (mm) ............... 1.9975-1.9985 (50.737-50.762)
Camshaft Journal Radial Clearance, in (mm) ............... 0.0015-0.0040 (0.038-0.102)
Camshaft End Play, in (mm) ............... 0.002-0.006 (0.051-0.152)
Cam Lobe Lift (Intake), in (mm) ............... 0.285 (7.24)
Cam Lobe Lift (Exhaust), in (mm) ............... 0.285 (7.24)
Rocker Shaft Outer Diameter, in (mm) ............... 0.7485-0.7495 (19.012-19.037)
Rocker Arm Bushing Internal Diameter, in (mm) ............... 0.7505-0.7515 (19.063-19.088)
Rocker Arm to Shaft Clearance, in (mm) ............... 0.0010-0.0030 (0.025-0.076)
Tappet Body Outer Diameter, in (mm) ............... 0.5605-0.5615 (14.237-14.262)
Tappet Bore Diameter in Block, in (mm) ............... 0.5630-0.5640 (14.300-14.326)
Tappet Clearance in Block Bore, in (mm) ............... 0.0015-0.0035 (0.038-0.089)

Tightening Torques

Cylinder Head Bolts (Stage 1), lb-ft (Nm) ............... 40 (54.2)
Cylinder Head Bolts (Stage 2), lb-ft (Nm) ............... 75 (101.7)
Cylinder Head Bolts (Stage 3), lb-ft (Nm) ............... 110 (149.1)
Main Bearing Cap Bolts, lb-ft (Nm) ............... 115 (155.9)
Connecting Rod Cap Nuts (Stage 1), lb-ft (Nm) ............... 25 (33.9)
Connecting Rod Cap Nuts (Stage 2), lb-ft (Nm) ............... 75 (101.7)
Flywheel to Crankshaft Bolts, lb-ft (Nm) ............... 80 (108.5)
Flywheel Housing to Block Bolts, lb-ft (Nm) ............... 35 (47.5)
Crankshaft Pulley Center Bolt, lb-ft (Nm) ............... 150 (203.4)
Camshaft Thrust Plate Bolts, lb-ft (Nm) ............... 18 (24.4)
Camshaft Gear Retaining Bolt, lb-ft (Nm) ............... 55 (74.6)
Rocker Shaft Bracket Bolts, lb-ft (Nm) ............... 30 (40.7)
Rocker Arm Adjusting Screw Locknuts, lb-ft (Nm) ............... 15 (20.3)
Cylinder Head Cover Rocker Cover Screws, lb-ft (Nm) ............... 6 (8.1)
Oil Pan Sump Drain Plug, lb-ft (Nm) ............... 35 (47.5)
Oil Pan Sump Retaining Bolts, lb-ft (Nm) ............... 14 (19.0)
Oil Pump to Cylinder Block Bolts, lb-ft (Nm) ............... 18 (24.4)
Timing Gear Cover Housing Bolts, lb-ft (Nm) ............... 15 (20.3)
Timing Backplate to Cylinder Block Bolts, lb-ft (Nm) ............... 18 (24.4)
Idler Gear Spindle Retaining Bolts, lb-ft (Nm) ............... 35 (47.5)
Fuel Injection Pump Drive Gear Nut, lb-ft (Nm) ............... 45 (61.0)
Fuel Injection Pump Cradle to Block Bolts, lb-ft (Nm) ............... 30 (40.7)
Fuel Injection Pump to Cradle Straps, lb-ft (Nm) ............... 15 (20.3)
Fuel Injector Clamp Retaining Nuts, lb-ft (Nm) ............... 15 (20.3)
High Pressure Fuel Pipe Union Nuts, lb-ft (Nm) ............... 18 (24.4)
Fuel Low Pressure Feed Pipe Banjo Bolts, lb-ft (Nm) ............... 12 (16.3)
Fuel Leak-Back Pipe Banjo Screws, lb-ft (Nm) ............... 6 (8.1)
Water Pump to Cylinder Block Bolts, lb-ft (Nm) ............... 15 (20.3)
Water Outlet Thermostat Housing Bolts, lb-ft (Nm) ............... 15 (20.3)
Fan Blade Assembly to Hub Bolts, lb-ft (Nm) ............... 15 (20.3)
Intake Manifold to Cylinder Head Bolts, lb-ft (Nm) ............... 22 (29.8)
Exhaust Manifold to Cylinder Head Stud Nuts, lb-ft (Nm) ............... 22 (29.8)
Starter Motor Mount Bolts, lb-ft (Nm) ............... 45 (61.0)
Alternator Mounting Bracket Bolts, lb-ft (Nm) ............... 35 (47.5)
Alternator Pivot Adjustment Bolt, lb-ft (Nm) ............... 18 (24.4)
Oil Filter Adaptor Center Bolt, lb-ft (Nm) ............... 25 (33.9)
Crankcase Breather Assembly Bolts, lb-ft (Nm) ............... 10 (13.6)
Exhaust Pipe Downpipe Flange Nuts, lb-ft (Nm) ............... 30 (40.7)
Oil Pressure Switch Sensor Unit, lb-ft (Nm) ............... 12 (16.3)
Water Temperature Gauge Sender Unit, lb-ft (Nm) ............... 15 (20.3)
Flywheel Housing Inspection Cover Screws, lb-ft (Nm) ............... 5 (6.8)
Oil Pump Cover Plate Screws, lb-ft (Nm) ............... 8 (10.8)
Front Crankshaft Oil Seal Retainer Bolts, lb-ft (Nm) ............... 14 (19.0)
Rear Crankshaft Oil Seal Retainer Bolts, lb-ft (Nm) ............... 14 (19.0)
Fuel Lift Pump Mounting Bolts, lb-ft (Nm) ............... 15 (20.3)
Fuel Filter Bracket to Block Bolts, lb-ft (Nm) ............... 22 (29.8)
Air Cleaner Mounting Bracket Bolts, lb-ft (Nm) ............... 22 (29.8)
Glow Plug or Thermostart Unit in Manifold, lb-ft (Nm) ............... 20 (27.1)
Cylinder Block Oil Gallery End Plugs, lb-ft (Nm) ............... 25 (33.9)
Cylinder Block Drain Tap Cock Assembly, lb-ft (Nm) ............... 15 (20.3)

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