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John Deere 4024T Engine

The John Deere 4024T is a 2.4-liter, 4-cylinder, turbocharged PowerTech diesel engine widely deployed across agricultural equipment, construction machinery (such as tractors and backhoes), marine conversions, and stationary generator units. Engineered for durable off-highway performance, it belongs to John Deere's compact displacement family designed to offer high torque density within a reduced physical footprint. The engine features heavy-duty component engineering, including cast-iron construction of the block and cylinder head, standard 12-volt electrical systems, and modular replacement parts suited for demanding operational lifecycles.

The cylinder head utilizes a conventional overhead valve design configured with 1 intake valve and 1 exhaust valve per cylinder (2 valves total per cylinder). The overhead system is actuated via a traditional camshaft and pushrod arrangement. Component tolerance inspection requires monitoring the valve recess, which carries a workshop specification range of 0.08-1.40 mm. Bore: 86 mm (3.4 in). Stroke: 105 mm (4.1 in). Total Displacement: 2.44 liters (149 cu.in). Compression Ratio: 19.1:1 to 20:1.

The fuel system uses a direct-injection configuration relying on a mechanical injection pump to meter and distribute fuel to individual injectors. Primary filtration and water separation are managed by a dedicated inline fuel filter assembly, requiring replacement every 500 hours or 12 months. Cold-start aid is provided through integrated cylinder glow plugs. The mechanical setup requires diesel fuel with a minimum cetane rating of 45, with a preferred fuel sulfur content of less than 0.05%.

The lubrication circuit uses a pressurized wet-sump system driven by an internal oil pump. The recommended lubricant specification is John Deere PLUS-50 oil. Under standard operations using specified fuel, the maintenance interval for the oil filter and crankcase oil change is 500 hours. Engine temperature regulation is achieved through a liquid-jacket cooling loop driven by a belt-driven centrifugal water pump. The factory-recommended cooling medium is John Deere COOL-GARD or COOL-GARD II pre-mix.

General Technical Data

Engine Specifications

Engine Model ............... John Deere 4024T PowerTech
Engine Type ............... 4-cycle inline 4-cylinder direct injection liquid-cooled diesel
Number of Cylinders ............... 4
Cylinder Arrangement ............... In-line
Engine Bore, in (mm) ............... 3.39 (86.0)
Engine Stroke, in (mm) ............... 4.13 (105.0)
Displacement, cu.in (L) ............... 146 (2.4)
Rated Power, hp (kW) ............... 43.1-66.0 (32.1-49.2)
Rated Speed, rpm ............... 2200-2800
Peak Torque ............... 170-220 Nm (125-162 lb-ft) at 1600-1800 rpm
Idle Speed ............... 800-950 rpm
Aspiration Type ............... Turbocharged
Operating Speed Range ............... 1500-2800 rpm
Compression Ratio ............... 18.0:1-20.0:1
Firing Order ............... 1-3-4-2
Connecting Rod Design ............... Fractured-split steel forged build
Camshaft Drive ............... Helical gear train system
Valves Per Cylinder ............... 2
Combustion Chamber ............... Direct injection
Cylinder Block Type ............... Cast iron monoblock
Cylinder Head Type ............... Cast iron one-piece crossflow design
Lubrication System ............... Full-pressure gear-driven assembly
Oil Pump Type ............... Internal gear-driven rotary type
Oil Filter Type ............... Full-flow, spin-on cartridge element
Cooling System ............... Liquid-cooled pressurized system
Water Pump Type ............... Belt-driven, centrifugal impeller
Air Cleaner Type ............... Dry dual-stage heavy-duty element
Starting System ............... Electric starter motor actuation
Electrical System ............... 12V or 24V configurations
Alternator Capacity, A ............... 70-120
Starter Motor Power, hp (kW) ............... 2.9-4.0 (2.2-3.0)

Fuel System

Fuel Injection Pump Type ............... Mechanical rotary or unit injection standard
Fuel Injection Pump Model ............... Stanadyne or Delphi variant options
Fuel Transfer Pump Type ............... Mechanical diaphragm lift assembly
Fuel Transfer Pump Pressure, psi (kPa) ............... 4.4-8.7 (30.0-60.0)
Injection Nozzle Type ............... Multi-hole micro-orifice delivery system
Injection Opening Pressure, psi (MPa) ............... 3625-3916 (25.0-27.0)
Fuel Filter Type ............... Primary spin-on with water separator
Governor Type ............... Mechanical or electronic management
Injection Timing Angle, deg ............... 10.0-14.0 BTDC
Fuel Drain System Type ............... Manual valve water basin integration
Fuel Supply Lines Diameter, in (mm) ............... 0.31 (8.0)
Fuel Return Lines Diameter, in (mm) ............... 0.25 (6.3)
Cold Start Advance System ............... Electric solenoid wax element device
Fuel Leak-off Rail Design ............... Rigid steel connection overflow loop
Injection Lines Outer Diameter, in (mm) ............... 0.23 (6.0)
Injection Lines Inner Diameter, in (mm) ............... 0.07 (2.0)

Dimensions and Weight

Overall Length, in (mm) ............... 26.2 (665)
Overall Width, in (mm) ............... 22.3 (565)
Overall Height, in (mm) ............... 30.5 (775)
Dry Weight, lbs (kg) ............... 547 (248)
Wet Weight, lbs (kg) ............... 582 (264)

Maintenance Data

Service Information

Oil Pressure at Low Idle, psi (kPa) ............... 15.0 (103.0)
Oil Pressure at Rated Speed, psi (kPa) ............... 40.0-60.0 (276.0-414.0)
Oil Pressure Relief Valve Setting, psi (kPa) ............... 65.0 (448.0)
Cooling System Cap Pressure, psi (kPa) ............... 10.0-15.0 (69.0-103.0)
Thermostat Initial Opening Temperature, F (C) ............... 180 (82)
Thermostat Full Open Temperature, F (C) ............... 202 (94)
Maximum Allowable Coolant Temperature, F (C) ............... 221 (105)
Minimum Coolant Operating Temperature, F (C) ............... 165 (74)
Intake Valve Clearance,Cold, in (mm) ............... 0.0140 (0.356)
Exhaust Valve Clearance, Cold, in (mm) ............... 0.0180 (0.457)

Engine Oil and Coolant

Engine Oil Type .................. SAE 10W-30, SAE 15W-40, or JD Plus-50
API Service Classifications ......................... CH-4 or CI-4
Engine Oil Capacity with Filter Change, qt (L) ............... 8.5 (8.0)
Engine Oil Capacity, Minimum Level, qt (L) ............... 6.9 (6.5)
Cooling System Capacity, Engine Only, qt (L) ............... 3.2 (3.0)
Cooling System Capacity with Radiator, qt (L) ............... 8.0 (7.6)

Service Intervals

Change oil and filter ............... Every 500 hours
Inspect air cleaner ............... Every 250 hours
Replace air cleaner ............... Every 1000 hours
Replace fuel filter ............... Every 500 hours
Valve clearance adjustment ............... Every 1000 hours
Fuel system inspection ............... Every 1000 hours
Change coolant ............... Every 2000 hours
Compression test ............... Every 1000 hours
Clean radiator core ............... Every 250 hours
Inspect belt tension ............... Every 250 hours

Service Specifications

Cylinder Bore Inner Diameter, in (mm) ............... 3.3858-3.3866 (86.000-86.020)
Cylinder Bore Maximum Wear Limit, in (mm) ............... 3.3898 (86.100)
Cylinder Bore Out-of-Round Limit, in (mm) ............... 0.0008 (0.020)
Cylinder Bore Taper Limit, in (mm) ............... 0.0008 (0.020)
Main Bearing Journal Diameter, in (mm) ............... 2.7543-2.7551 (69.960-69.980)
Main Bearing Oil Clearance, in (mm) ............... 0.0016-0.0035 (0.040-0.090)
Main Bearing Bore Inner Diameter, in (mm) ............... 2.9527-2.9535 (75.000-75.020)
Main Bearing Shell Thickness, in (mm) ............... 0.0984 (2.500)
Connecting Rod Journal Diameter, in (mm) ............... 2.2031-2.2039 (55.960-55.980)
Connecting Rod Oil Clearance, in (mm) ............... 0.0014-0.0033 (0.036-0.084)
Crankpin Bore Inner Diameter, in (mm) ............... 2.3622-2.3630 (60.000-60.020)
Connecting Rod Side Play, in (mm) ............... 0.0047-0.0118 (0.120-0.300)
Crankshaft Axial End Play, in (mm) ............... 0.0015-0.0150 (0.038-0.381)
Crankshaft Main Journal Out-of-Round, in (mm) ............... 0.0002 (0.005)
Piston Skirt Outer Diameter, in (mm) ............... 3.3823-3.3835 (85.910-85.940)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0023-0.0043 (0.060-0.110)
Piston Pin Outer Diameter, in (mm) ............... 1.1811-1.1815 (30.000-30.010)
Piston Pin Bushing Inside Diameter, in (mm) ............... 1.1823-1.1831 (30.030-30.050)
Piston Pin Clearance in Con Rod Bushing, in (mm) ............... 0.0008-0.0020 (0.020-0.050)
Piston Pin Hole Clearance in Piston Boss, in (mm) ............... 0.0001-0.0005 (0.003-0.013)
Top Ring Groove Width, in (mm) ............... 0.0811-0.0823 (2.060-2.090)
Second Ring Groove Width, in (mm) ............... 0.0799-0.0811 (2.030-2.060)
Oil Ring Groove Width, in (mm) ............... 0.1587-0.1598 (4.030-4.060)
Top Ring End Gap, in (mm) ............... 0.0098-0.0157 (0.250-0.400)
Second Ring End Gap, in (mm) ............... 0.0138-0.0216 (0.350-0.550)
Oil Ring End Gap, in (mm) ............... 0.0098-0.0196 (0.250-0.500)
Top Ring Side Clearance, in (mm) ............... 0.0027-0.0043 (0.070-0.110)
Second Ring Side Clearance, in (mm) ............... 0.0016-0.0031 (0.040-0.080)
Oil Ring Side Clearance, in (mm) ............... 0.0012-0.0027 (0.030-0.070)
Cylinder Head Deck Flatness, in (mm) ............... 0.0020 (0.050)
Cylinder Block Deck Face Flatness, in (mm) ............... 0.0020 (0.050)
Intake Valve Stem Outer Diameter, in (mm) ............... 0.3134-0.3142 (7.960-7.980)
Exhaust Valve Stem Outer Diameter, in (mm) ............... 0.3126-0.3134 (7.940-7.960)
Valve Guide Inside Diameter, in (mm) ............... 0.3150-0.3161 (8.000-8.030)
Intake Valve Stem to Guide Clearance, in (mm) ............... 0.0008-0.0027 (0.020-0.070)
Exhaust Valve Stem to Guide Clearance, in (mm) ............... 0.0016-0.0035 (0.040-0.090)
Intake Valve Seat Angle, deg ............... 30.0
Exhaust Valve Seat Angle, deg ............... 45.0
Valve Spring Free Length, in (mm) ............... 1.9291 (49.000)
Camshaft Journal Diameter (№1), in (mm) ............... 1.9665-1.9673 (49.950-49.970)
Camshaft Journal Diameter (№2), in (mm) ............... 1.9271-1.9279 (48.950-48.970)
Camshaft Journal Diameter (№3), in (mm) ............... 1.8878-1.8886 (47.950-47.970)
Camshaft Journal Diameter (№4), in (mm) ............... 1.8484-1.8492 (46.950-46.970)
Camshaft Bearing Inside Diameter, in (mm) ............... 1.9685-1.9705 (50.000-50.050)
Camshaft Oil Clearance, in (mm) ............... 0.0012-0.0040 (0.030-0.100)
Camshaft End Play, in (mm) ............... 0.0024-0.0094 (0.060-0.240)
Cam Lobe Height (Intake), in (mm) ............... 1.4567 (37.000)
Cam Lobe Height Lift (Exhaust), in (mm) ............... 1.4764 (37.500)
Rocker Arm Shaft Outer Diameter, in (mm) ............... 0.7472-0.7480 (18.980-19.000)
Rocker Arm Bushing Inner Diameter, in (mm) ............... 0.7492-0.7504 (19.030-19.060)
Rocker Arm Bushing to Shaft Clearance, in (mm) ............... 0.0012-0.0031 (0.030-0.080)
Tappet Body Journal Outer Diameter, in (mm) ............... 0.7854-0.7862 (19.950-19.970)
Tappet Guide Bore Inside Diameter, in (mm) ............... 0.7874-0.7886 (20.000-20.030)
Tappet to Block Guide Clearance, in (mm) ............... 0.0012-0.0031 (0.030-0.080)

Tightening Torques

Cylinder Head Bolts (Step 1), lb-ft (Nm) ............... 44.0 (60.0)
Cylinder Head Bolts (Step 2), lb-ft (Nm) ............... 81.0 (110.0)
Cylinder Head Bolts (Step 3), lb-ft (Nm) ............... 81.0 (110.0)
Main Bearing Cap Screws (Step 1), lb-ft (Nm) ............... 37.0 (50.0)
Main Bearing Cap Screws (Step 2), lb-ft (Nm) ............... 100.0 (135.0)
Connecting Rod Cap Screws (Step 1), lb-ft (Nm) ............... 22.0 (30.0)
Connecting Rod Cap Screws (Step 2), lb-ft (Nm) ............... 44.0 (60.0)
Flywheel Retaining Bolts, lb-ft (Nm) ............... 85.0 (115.0)
Flywheel Housing to Block Fasteners, lb-ft (Nm) ............... 37.0 (50.0)
Crankshaft Pulley Hub Center Bolt, lb-ft (Nm) ............... 118.0 (160.0)
Camshaft Gear Thrust Plate Attachment Bolt, lb-ft (Nm) ............... 26.0 (35.0)
Rocker Arm Shaft Support Pedestal Fastener, lb-ft (Nm) ............... 35.0 (47.0)
Rocker Arm Adjuster Locknut Screw, lb-ft (Nm) ............... 20.0 (27.0)
Rocker Arm Valve Cover Perimeter Fasteners, lb-in (Nm) ............... 96.0 (11.0)
Oil Pan Perimeter Base Attachment Fasteners, lb-ft (Nm) ............... 26.0 (35.0)
Oil Pan Suction Tube Support Arm Bolt, lb-ft (Nm) ............... 18.0 (24.0)
Oil Pan Hydraulic Sump Threaded Drain Plug, lb-ft (Nm) ............... 37.0 (50.0)
Exhaust Manifold Mounting Nuts Center Outward, lb-ft (Nm) ............... 33.0 (45.0)
Intake Manifold Top Cover Screws, lb-ft (Nm) ............... 22.0 (30.0)
Turbocharger Housing Exhaust Turbine Flange, lb-ft (Nm) ............... 33.0 (45.0)
Turbocharger Oil Supply Line Fitting Block, lb-ft (Nm) ............... 18.0 (24.0)
Turbocharger Oil Drain Tube Connection Pan, lb-in (Nm) ............... 84.0 (9.5)
Water Pump Assembly Body Housing Fasteners, lb-ft (Nm) ............... 26.0 (35.0)
Thermostat Housing Water Outlet Flange Screws, lb-ft (Nm) ............... 22.0 (30.0)
Fuel Injection Pump Drive Gear Nut, lb-ft (Nm) ............... 63.0 (85.0)
Fuel Injection Pump Body Flange Mounting Nuts, lb-ft (Nm) ............... 22.0 (30.0)
Fuel Injector Assembly Clamping Bracket Bolt, lb-ft (Nm) ............... 26.0 (35.0)
Fuel Injection High Pressure Line Union Nuts, lb-ft (Nm) ............... 20.0 (27.0)
Fuel Transfer Diaphragm Pump Attachment Bolts, lb-ft (Nm) ............... 18.0 (24.0)
Fuel Filter Header Base Bracket Fasteners, lb-ft (Nm) ............... 26.0 (35.0)
Oil Pump Housing Cover Screws, lb-in (Nm) ............... 108.0 (12.0)
Oil Pump Pressure Relief Valve Plung Assembly, lb-ft (Nm) ............... 37.0 (50.0)
Oil Filter Cooler Adapter Core Center Bolt, lb-ft (Nm) ............... 33.0 (45.0)
Front Timing Gear Housing Plate Screw, lb-ft (Nm) ............... 26.0 (35.0)
Front Timing Gear Cover Shield Screws, lb-ft (Nm) ............... 18.0 (24.0)
Starter Motor Flange Flange Mounting Fasteners, lb-ft (Nm) ............... 59.0 (80.0)
Alternator Support Pivot Base Bracket, lb-ft (Nm) ............... 37.0 (50.0)
Alternator Adjusting Tension Strap Locking Bolt, lb-ft (Nm) ............... 22.0 (30.0)
Glow Plug Installation Thread Hex Interface, lb-ft (Nm) ............... 13.0 (18.0)
Glow Plug Electrical Harness Terminal Small Nut, lb-in (Nm) ............... 18.0 (2.0)
Engine Crankcase Oil Pressure Sensor Unit, lb-ft (Nm) ............... 11.0 (15.0)
Engine Coolant High Temperature Sensor Housing, lb-ft (Nm) ............... 18.0 (24.0)
Flywheel Housing Inspection Window Plate Cover, lb-in (Nm) ............... 84.0 (9.5)
Crankcase Ventilation Breather Assembly Screws, lb-in (Nm) ............... 96.0 (11.0)
Balancer Shaft Assembly Bearing Plate, lb-ft (Nm) ............... 37.0 (50.0)
Oil Spray Cooling Jet Passages Orifice Plugs, lb-ft (Nm) ............... 11.0 (15.0)
Cylinder Block Main Oil Gallery End Plugs, lb-ft (Nm) ............... 26.0 (35.0)

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