________________________________________________________________________________

Ford 2726T Engine

The Ford 2726T is a heavy-duty, 6-cylinder inline, 4-stroke industrial and marine diesel engine belonging to the Ford Dover engine family (produced in Dagenham, UK). Developed as an evolution of the earlier Dorset series, the Dover block offers structural improvements including enhanced block casting stiffness and optimized fluid routing. Frequently adapted for marine service by developers like Lehman Power Corporation (as the Ford Lehman 2726T) and Mermaid Marine (as the Mermaid Mistral), this engine is highly regarded for its low-RPM dependability, lack of sensitive electronics, and high low-end torque. It is commonly deployed in trawlers, commercial workboats, displacement yachts, and heavy industrial machinery.

Valve Configuration: Overhead valve (OHV) configuration actuated via camshaft, pushrods, and rocker arms. Layout: 2 valves per cylinder (1 intake, 1 exhaust) aligned inline along the cylinder head. Displacement: 5.95 Liters (5,950 cc / 363 cubic inches). Bore Diameter: 105 mm (4.125 inches). Stroke Length: 115 mm (4.524 inches). Cylinder Liners: Features replaceable dry cylinder liners. Factory specification dictates a liner protrusion height above the block deck of 0.0254 mm.

Fuel System: Direct injection (DI) combustion chamber layout with fuel sprayed directly onto the piston crowns. Injection Pump: Inline mechanical fuel injection pump (typically Minimec/Simms or Bosch mechanical governors) driven directly by the engine timing gear network. Fuel Feed: A mechanical diaphragm-type fuel lift pump draws fuel from storage through primary water separators into secondary fine paper-element filters before reaching the main injection gallery. Aspiration: Forced induction via a single exhaust-driven turbocharger (Garrett or similar), optimizing air-fuel mixing without the assistance of complex electronic engine management.

Lubrication System: Forced pressure-fed system via a gear-driven oil pump off the timing gear train. Pressure Regulation: Controlled via a calibrated spring-loaded oil pressure relief valve that bypasses excess fluid volume directly back into the oil pan to safeguard seals against over-pressurization. Filtration and Cooling: Incorporates a full-flow spin-on cartridge filter element working in tandem with an integrated liquid-to-oil engine oil cooler. Piston cooling oil nozzles are present on specific blocks, subject to production sleeve updates.

Cooling System: Dual-circuit fresh water / raw water system on marine variants, or standard radiator jacket water circulation on industrial layouts. Circulation: Centrifugal automotive-type water pump driven by a sheave belt from the crankshaft. The pump utilizes a cassette-type seal and heavy-duty 25.4 mm bearings, and features an integrated rear bypass block connection to prevent localized hotspots. Temperature Management: Regulated by a wax-element thermostat to maintain optimum internal coolant operating temperature. Marine applications utilize an external heat exchanger alongside an auxiliary raw water pump driven by the rear PTO timing housing.

General Technical Data

Engine Specifications

Engine Model ............... Ford 2726T
Engine Series ............... Ford 2720 Range Dover Series
Engine Type ............... 4-cycle inline 6-cylinder turbocharged liquid-cooled diesel
Number of Cylinders ............... 6
Cylinder Arrangement ............... In-line vertical
Engine Bore, in (mm) ............... 4.133 (105.00)
Engine Stroke, in (mm) ............... 4.524 (114.90)
Total Displacement, cu.in (L) ............... 363.1 (5.95)
Rated Engine Power, hp (kW) ............... 150-175 (112-130)
Rated Engine Speed, rpm ............... 2400-2500
Peak Torque output, lb-ft (Nm) ............... 365-385 (495-522) at 1600 rpm
Idle Speed Minimum, rpm ............... 600-650
Maximum No Load Speed, rpm ............... 2750-2850
Aspiration Type ............... Turbocharged gas-driven turbine compressor
Compression Ratio ............... 15.5:1
Firing Order ............... 1-5-3-6-2-4
Direction of Rotation ............... Clockwise viewed from front pulley end
Combustion Chamber ............... Direct injection
Cylinder Block Material ............... High strength cast iron alloy alloyed
Cylinder Head Material ............... Monobloc heavy duty cast iron alloy
Cylinder Sleeves Type ............... Dry liner interference fit cast iron liners
Lubrication System ............... Full pressure forced lubrication circuit
Oil Pump Type ............... Gear driven positive displacement rotary pump
Oil Filter Type ............... Full flow spin on disposable cartridge element
Cooling System ............... Liquid forced circulation centrifugal pump circuit
Water Pump Type ............... Belt driven centrifugal impeller type
Air Cleaner Type ............... Heavy duty dry element with safety element
Starting System ............... Electric starter motor
Electrical Voltage, V ............... 12 or 24
Alternator Output, A ............... 55-90

Fuel System

Fuel Injection Pump Model ............... Bosch or Minimec inline mechanical pump
Governor Control Mechanism ............... Mechanical centrifugal or pneumatic option type
Fuel Injection Timing, deg BTDC ............... 19.0 to 21.0
Fuel Injector Nozzle Holder Type ............... Multi hole flange mounted multi spray layout
Fuel Injector Spray Holes Number ............... 4 holes or 5 holes design variant
Fuel Injector Hole Diameter, in (mm) ............... 0.011 (0.28)
Fuel Injector Opening Pressure, psi (bar) ............... 3045-3190 (210-220)
Fuel Transfer Feed Pump Type ............... Mechanical plunger slider, driven by camshaft
Fuel Transfer Pump Delivery Pressure, psi (bar) ............... 14.5-21.7 (1.0-1.5)
Fuel Filter Priming ............... Hand primer lever integrated into lift pump body
Fuel Filter Core Element ............... Dual stage paper element spin on filtration
Fuel Injection Pipe Outer Diameter, in (mm) ............... 0.236 (6.00)
Fuel Injection Pipe Inner Diameter, in (mm) ............... 0.078 (2.00)
Fuel Return Overflow Valve Pressure, psi (bar) ............... 11.6-17.4 (0.8-1.2)
Maximum Fuel Inlet Temperature, F (C) ............... 140.0 (60.0)
Fuel System Bleeding ............... Bleed screw plug on main filter header casting
Maximum Allowed Fuel Lift Height, ft (m) ............... 4.92 (1.50)
Fuel Injection Nozzle Protrusion, in (mm) ............... 0.059-0.078 (1.50-2.00)
Fuel Pump Spill Cut Off Timing, deg BTDC ............... 20.0
Governor High Speed Idle Limit, rpm ............... 2780
Governor Low Speed Idle Limit, rpm ............... 600
Fuel Pump Drive Gear Backlash, in (mm) ............... 0.003-0.006 (0.076-0.152)
Fuel Stop Control Method ............... Mechanical cable lever or electrical shutdown solenoid
Fuel Grade Recommendation ............... Class A2 ultra low sulfur automotive diesel

Dimensions and Weight

Overall Length, in (mm) ............... 44.25 (1125)
Overall Width, in (mm) ............... 26.77 (680)
Overall Height, in (mm) ............... 38.38 (975)
Dry Weight, lb (kg) ............... 1168 (530)
Wet Weight, lb (kg) ............... 1234 (560)

Maintenance Data

Service Information

Compression Pressure, psi (bar) ............... 350-450 (24-31)
Oil Pressure At Rated Speed, psi (bar) ............... 43.5-58.0 (3.0-4.0)
Oil Pressure At Minimum Idle, psi (bar) ............... 14.5 (1.0)
Engine Oil Operating Temperature, F (C) ............... 230.0 (110.0)
Maximum Coolant Operating Temperature, F (C) ............... 203.0 (95.0)
Coolant Expansion Tank Cap Pressure, psi (bar) ............... 9.0-13.0 (0.6-0.9)
Thermostat Opening Temperature, F (C) ............... 172.4 (78.0)
Thermostat Fully Open Temperature, F (C) ............... 197.6 (92.0)
Alternator Belt Deflection Distance, in (mm) ............... 0.50 (12.7)
Intake Valve Clearance, in (mm) ............... 0.015 (0.38)
Exhaust Valve Clearance, in (mm) ............... 0.015 (0.38)

Engine Oil and Coolant

Engine Oil Type .................. SAE 30, SAE 20W-20, SAE 15W-40
API Service Classifications ......................... CD or CE
Engine Oil Sump Capacity, High, qt (L) ............... 20.28 (19.20)
Engine Oil Sump Capacity, Low, qt (L) ............... 14.79 (14.00)
Oil Filter Element Capacity, qt (L) ............... 1.58 (1.50)
Total Engine Oil Capacity, qt (L) ............... 21.87 (20.70)
Cooling System Capacity, gal (L) ............... 5.81 (22.00)

Service Intervals

Change oil and filter ............... Every 200 hours
Inspect air cleaner ............... Every 100 hours
Replace air cleaner ............... Every 1000 hours
Replace fuel filter ............... Every 400 hours
Valve clearance adjustment ............... Every 400 hours
Fuel system inspection ............... Every 800 hours
Change coolant ............... Every 1000 hours
Compression test ............... Every 600 hours
Belt inspection ............... Every service cycle

Service Specifications

Cylinder Bore Diameter (Grade A), in (mm) ............... 4.1332-4.1336 (105.000-105.010)
Cylinder Bore Diameter (Grade B), in (mm) ............... 4.1336-4.1340 (105.010-105.020)
Cylinder Bore Diameter (Grade C), in (mm) ............... 4.1340-4.1344 (105.020-105.030)
Cylinder Bore Diameter (Grade D), in (mm) ............... 4.1344-4.1348 (105.030-105.040)
Cylinder Liner Outside Diameter, in (mm) ............... 4.254-4.255 (108.05-108.08)
Cylinder Liner Interference Fit In Block, in (mm) ............... 0.002-0.004 (0.050-0.100)
Cylinder Liner Internal Diameter, in (mm) ............... 4.133-4.134 (105.000-105.040)
Cylinder Block Deck Surface Flatness, in (mm) ............... 0.0020 (0.051)
Connecting Rod Small End Bushing O.D, in (mm) ............... 1.628-1.629 (41.35-41.38)
Connecting Rod Big End Bore I.D, in (mm) ............... 2.9160-2.9165 (74.066-74.079)
Connecting Rod Big End Bearing Thickness, in (mm) ............... 0.0885-0.0888 (2.248-2.256)
Crankshaft Main Journal Diameter, in (mm) ............... 3.2490-3.2496 (82.525-82.540)
Crankpin Journal Diameter, in (mm) ............... 2.7492-2.7498 (69.830-69.845)
Crankshaft Main Bearing Shell I.D, in (mm) ............... 3.2514-3.2524 (82.585-82.610)
Crankshaft Main Bearing Clearance, in (mm) ............... 0.0018-0.0034 (0.045-0.085)
Crankpin Bearing Clearance, in (mm) ............... 0.0014-0.0030 (0.035-0.075)
Crankshaft End Play, in (mm) ............... 0.002-0.008 (0.051-0.203)
Piston Skirt Diameter (Grade A), in (mm) ............... 4.1275-4.1279 (104.840-104.850)
Piston Skirt Diameter (Grade B), in (mm) ............... 4.1279-4.1283 (104.850-104.860)
Piston Skirt Diameter (Grade C), in (mm) ............... 4.1283-4.1287 (104.860-104.870)
Piston Skirt Diameter (Grade D), in (mm) ............... 4.1287-4.1291 (104.870-104.880)
Piston To Cylinder Bore Clearance, in (mm) ............... 0.0055-0.0063 (0.140-0.160)
Piston Pin Diameter, in (mm) ............... 1.4998-1.5000 (38.095-38.100)
Piston Pin Clearance In Piston Boss, in (mm) ............... 0.0001-0.0003 (0.003-0.008)
Piston Pin Clearance In Rod Small End, in (mm) ............... 0.0006-0.0012 (0.015-0.030)
Top Ring Groove Width, in (mm) ............... 0.093 (2.38)
Second Ring Groove Width, in (mm) ............... 0.093 (2.38)
Oil Ring Groove Width, in (mm) ............... 0.187 (4.75)
Top Ring Side Clearance, in (mm) ............... 0.0031-0.0047 (0.080-0.120)
Second Ring Side Clearance, in (mm) ............... 0.0024-0.0039 (0.060-0.100)
Oil Ring Side Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Top Ring End Gap, in (mm) ............... 0.016-0.026 (0.40-0.65)
Second Ring End Gap, in (mm) ............... 0.014-0.024 (0.35-0.60)
Oil Ring End Gap, in (mm) ............... 0.012-0.022 (0.30-0.55)
Cylinder Head Lower High Face Flatness, in (mm) ............... 0.0040 (0.102)
Intake Valve Head Diameter, in (mm) ............... 1.838-1.848 (46.68-46.94)
Exhaust Valve Head Diameter, in (mm) ............... 1.551-1.561 (39.40-39.65)
Intake Valve Stem Diameter, in (mm) ............... 0.3725-0.3732 (9.462-9.479)
Exhaust Valve Stem Diameter, in (mm) ............... 0.3712-0.3719 (9.428-9.446)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0013-0.0031 (0.033-0.079)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0026-0.0044 (0.066-0.112)
Valve Guide Inner Bore Diameter, in (mm) ............... 0.3745-0.3756 (9.512-9.540)
Valve Guide Outside Diameter, in (mm) ............... 0.6273-0.6278 (15.933-15.946)
Intake Valve Seat Angle, deg ............... 29.5-30.0
Exhaust Valve Seat Angle, deg ............... 44.5-45.0
Intake Valve Face Angle, deg ............... 30.0
Exhaust Valve Face Angle, deg ............... 45.0
Valve Spring Free Length, in (mm) ............... 1.940 (49.28)
Camshaft Journal Diameter (Number One), in (mm) ............... 2.122-2.123 (53.90-53.92)
Camshaft Journal Diameter (Number Two), in (mm) ............... 2.092-2.093 (53.14-53.16)
Camshaft Journal Diameter (Number Three), in (mm) ............... 2.062-2.063 (52.37-52.39)
Camshaft Journal Diameter (Number Four), in (mm) ............... 2.032-2.033 (51.61-51.63)
Camshaft Journal Diameter (Number Five), in (mm) ............... 2.002-2.003 (50.85-50.87)
Camshaft Journal Diameter (Number Six), in (mm) ............... 1.912-1.913 (48.56-48.58)
Camshaft Bearing Internal Clearance, in (mm) ............... 0.0015-0.0035 (0.038-0.089)
Camshaft End Float, in (mm) ............... 0.001-0.005 (0.025-0.127)
Rocker Shaft Outside Diameter, in (mm) ............... 0.749-0.750 (19.02-19.05)
Rocker Arm Bushing Inside Diameter, in (mm) ............... 0.751-0.752 (19.07-19.10)
Rocker Arm Bushing Clearance, in (mm) ............... 0.001-0.003 (0.025-0.076)
Tappet Pushrod Lifter Outside Diameter, in (mm) ............... 0.5615-0.5620 (14.262-14.275)
Tappet Guide Bore Diameter In Block, in (mm) ............... 0.5632-0.5645 (14.305-14.338)
Tappet Lifter Shaft Running Clearance, in (mm) ............... 0.0012-0.0030 (0.030-0.076)

Tightening Torques

Cylinder Head Bolts (Stage 1), lb-ft (Nm) ............... 30.0 (40.7)
Cylinder Head Bolts (Stage 2), lb-ft (Nm) ............... 60.0 (81.3)
Cylinder Head Bolts (Stage 3), lb-ft (Nm) ............... 90.0 (122.0)
Cylinder Head Bolts (Stage 4), lb-ft (Nm) ............... 115.0 (156.0)
Main Bearing Cap Retaining Bolts Fasteners, lb-ft (Nm) ............... 155.0 (210.0)
Connecting Rod Big End Cap Fastener Bolts Nuts, lb-ft (Nm) ............... 115.0 (156.0)
Flywheel Component To Crankshaft Retaining Bolts, lb-ft (Nm) ............... 150.0 (203.3)
Crankshaft Front Pulley Damper Center Bolt Nut, lb-ft (Nm) ............... 275.0 (372.8)
Camshaft Retaining Thrust Plate Fastener Screws, lb-ft (Nm) ............... 35.0 (47.5)
Camshaft Timing Drive Gear Center Hub Bolt, lb-ft (Nm) ............... 125.0 (169.5)
Rocker Arm Shaft Assembly Supporting Bracket Bolts, lb-ft (Nm) ............... 45.0 (61.0)
Valve Rocker Adjusting Screw Locking Jam Nuts, lb-ft (Nm) ............... 25.0 (33.9)
Cylinder Valve Rocker Cover Retaining Capscrews, lb-ft (Nm) ............... 12.0 (16.3)
Engine Lubrication Oil Sump Pan Perimeter Bolts, lb-ft (Nm) ............... 18.0 (24.4)
Engine Lubrication Oil Pan Sump Bottom Drain Plug, lb-ft (Nm) ............... 35.0 (47.5)
Oil Pump Assembly Internals Body Retaining Bolts, lb-ft (Nm) ............... 22.0 (29.8)
Oil Pump Pick Up Strainer Tube Flange Screws, lb-ft (Nm) ............... 15.0 (20.3)
Oil Pressure Relief Valve Body Hex Retainer Plug, lb-ft (Nm) ............... 45.0 (61.0)
Engine Oil Cooler Assembly Mounting Bracket Bolts, lb-ft (Nm) ............... 35.0 (47.5)
Engine Oil Filter Header Casting Housing Bolts, lb-ft (Nm) ............... 28.0 (38.0)
Front Timing Gear Housing Plate Perimeter Bolts, lb-ft (Nm) ............... 18.0 (24.4)
Front Timing Gear Housing Outer Cover Fasteners, lb-ft (Nm) ............... 15.0 (20.3)
Water Pump Assembly Internal Housing Casting Bolts, lb-ft (Nm) ............... 22.0 (29.8)
Thermostat Housing Cover Retaining Outlet Fasteners, lb-ft (Nm) ............... 18.0 (24.4)
Inlet Air Intake Manifold Retaining Cylinder Bolts, lb-ft (Nm) ............... 24.0 (32.5)
Exhaust Gas Manifold Retaining Cylinder Nuts Studs, lb-ft (Nm) ............... 28.0 (38.0)
Turbocharger Flange Mounting To Exhaust Stud Nuts, lb-ft (Nm) ............... 35.0 (47.5)
Turbocharger Compressor Turbine Housing Clamp Bands, lb-ft (Nm) ............... 12.0 (16.3)
Turbocharger Oil Feed Supply Pipe Flare Fittings, lb-ft (Nm) ............... 20.0 (27.1)
Turbocharger Oil Return Drain Flange Mounting Bolts, lb-ft (Nm) ............... 18.0 (24.4)
Fuel Injection Pump Mounting Flange Stud Nuts, lb-ft (Nm) ............... 35.0 (47.5)
Fuel Injection Pump Drive Gear Center Lock Nut, lb-ft (Nm) ............... 65.0 (88.1)
Fuel Injector Assembly Holding Nozzle Clamp Nuts, lb-ft (Nm) ............... 15.0 (20.3)
Fuel Injection High Pressure Feed Pipe Gland Nuts, lb-ft (Nm) ............... 18.0 (24.4)
Fuel Lift Supply Transfer Pump Mounting Stud Nuts, lb-ft (Nm) ............... 15.0 (20.3)
Fuel Filter Mounting Bracket Header Frame Bolts, lb-ft (Nm) ............... 24.0 (32.5)
Auxiliary Accessory Drive Shaft Thrust Plate Bolts, lb-ft (Nm) ............... 35.0 (47.5)
Auxiliary Accessory Drive Shaft Internal Gear Bolt, lb-ft (Nm) ............... 65.0 (88.1)
Flywheel Outer Housing Housing Shell Frame Bolts, lb-ft (Nm) ............... 65.0 (88.1)
Starter Motor Electric Frame Flange Mounting Bolts, lb-ft (Nm) ............... 45.0 (61.0)
Alternator Charging Unit Pivot Main Support Bolt, lb-ft (Nm) ............... 45.0 (61.0)
Alternator Tension Adjusting Strap Locking Screw, lb-ft (Nm) ............... 22.0 (29.8)
Cooling Fan Blade Assembly Hub Attachment Bolts, lb-ft (Nm) ............... 15.0 (20.3)
Engine Support Front Mounting Base Anchor Bolts, lb-ft (Nm) ............... 85.0 (115.2)
Engine Support Rear Mounting Base Anchor Bolts, lb-ft (Nm) ............... 85.0 (115.2)
Crankcase Breather Tube Bracket Fixing Cap Screw, lb-ft (Nm) ............... 12.0 (16.3)
Water Temperature Sender Switch Sensor Brass Plug, lb-ft (Nm) ............... 15.0 (20.3)
Oil Pressure Gauge Indicator Sender Unit Fitting, lb-ft (Nm) ............... 12.0 (16.3)
Glow Plug Preheater Element Thread System Option, lb-ft (Nm) ............... 20.0 (27.1)
Air Intake Flame Heater Fuel Pipe Connector, lb-ft (Nm) ............... 12.0 (16.3)
Exhaust Pipe Downpipe Adapter Flange Connection Nuts, lb-ft (Nm) ............... 35.0 (47.5)
Oil Sump Pan Internal Baffle Stiffening Plate Bolts, lb-ft (Nm) ............... 15.0 (20.3)
Timing Pointer Indicator Gauge Needle Attaching Screw, lb-ft (Nm) ............... 8.0 (10.8)
Injection Pump Inspection Window Access Cover Screws, lb-ft (Nm) ............... 5.0 (6.8)
Fuel Injection Pump Leak Off Pipe Banjo Bolts, lb-ft (Nm) ............... 9.0 (12.2)
Fuel Feed Supply Lift Pump Banjo Union Bolts, lb-ft (Nm) ............... 12.0 (16.3)
Fuel Primary Filter Base Center Stud Retainer, lb-ft (Nm) ............... 15.0 (20.3)
Fuel Secondary Filter Base Center Stud Retainer, lb-ft (Nm) ............... 15.0 (20.3)

________________________________________________________________________________________

• Ford Engines Specs
  
• Ford 2722E Specs
  
• Ford 2725E Specs
  
• Ford 2728T Specs
  
• Ford CSG-637 Specs
  

______________________________________________________________________________________

________________________________________________________________________________________

_______________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________