Used John Deere 4045T Diesel Engine for Sale | OEM Used 4.5L PowerTech Turbocharged Inline-4 (Agricultural, Industrial, Marine, Generator)
$6,599.00
At a Glance
- Condition: OEM used, all 4 cylinders compression tested
- Availability: In stock, multiple 4045T variants available
- Shipping: Free shipping to all 50 states via crated freight, 7 to 14 business days
- All 4 cylinders compression tested, results available before you pay
- Variant confirmed (basic 4045T, 4045TF, 4045HF, 4045TFM marine, or Tier 4)
- Emissions tier documented (Tier 2 / Tier 3 / Tier 4)
- Fuel system operation verified (mechanical pump or high-pressure common rail)
- Turbocharger condition inspected
- Top-end inspection (head, rocker arms, valve train)
- Donor application documented (tractor, combine, construction, generator, marine)
- 100% inspection before every order ships
- No core charge required
- Backed by a 15 day replacement warranty against internal defects
Description
About the John Deere 4045T Diesel Engine
High-Quality Used John Deere 4045T Diesel Engine in great condition.
The exceptional performance and reliability of this used John Deere 4045T diesel engine for sale at Part Nests is unmatched. Ideal for an array of agricultural, construction, industrial, marine, and generator applications, this powerful engine is a trusted choice for John Deere equipment owners and repower project builders alike.
The John Deere PowerTech Family
The 4045T is part of John Deere PowerTech engine family, John Deere modern industrial diesel engine lineup. The PowerTech family covers a range of displacements, all sharing common engineering philosophy (replaceable wet liners, robust bottom-end, common service architecture):
| Detail | Description |
|---|---|
| PowerTech 3029 | 3.0 liter Inline-3, smaller applications |
| PowerTech 4045 (THIS LISTING) | 4.5 liter Inline-4, the workhorse of the PowerTech family |
| PowerTech 6068 | 6.8 liter Inline-6, larger applications |
| PowerTech 6090 | 9.0 liter Inline-6, heavy-duty applications |
| PowerTech 6135 / 13.5L | Largest PowerTech, heavy industrial / marine |
The 4045 has been continuously refined across multiple emissions generations with various sub-variants:
- 4045T (basic turbocharged), this listing primary variant
- 4045TF (Tier 2 turbocharged, common in 2000s production)
- 4045HT / 4045HF (turbocharged with aftercooler, higher output)
- 4045TFM (marine propulsion variant, marine cooling jacket, marine-spec accessories)
- 4045HF275 (Tier 4 Final, high-horsepower current production)
- 4045HF285 (Tier 4 Final, higher output variant)
Each variant has different ECM calibration, aftercooling, and emissions hardware. Confirm your specific application before ordering.
Compatibility and Usage
Agricultural Equipment:
1. John Deere Tractors: John Deere 5000 Series (utility tractors), John Deere 6000 Series (mid-size tractors), John Deere 7000 Series (high-horsepower tractors), and various compact and utility tractor applications
2. Combines and Harvesters: John Deere 9450 Combine, John Deere 9550 Combine, and similar agricultural harvesting equipment
Construction Equipment:
1. Loaders: John Deere 244J Compact Loader, John Deere 304J Compact Loader
2. Excavators: John Deere 75G Excavator, John Deere 85G Excavator (mid-size construction excavators)
3. Backhoes: John Deere 310G Backhoe, John Deere 310SG Backhoe, and related backhoe loader chassis
4. Skid Steers: John Deere 320 Skid Steer, John Deere 325 Skid Steer, and related compact equipment
Industrial Equipment:
1. Generators: John Deere 4045T-powered stationary generators, portable generator units
2. Pumps: Industrial water pumps, irrigation pumps, well-service pumps
3. Compressors: Industrial air compressors (Sullair, Ingersoll-Rand portables with 4045T option)
Forestry Equipment:
1. Log Loaders: John Deere 437D Log Loader and similar forestry equipment
2. Forwarders: John Deere 1010E Forwarder and other forwarder applications
Marine Applications:
1. Small Marine Vessels: Fishing boats, small commercial workboats, recreational boats
2. Use 4045TFM variant for marine applications (marine-spec cooling and accessories)
Other Applications:
1. Utility Vehicles: Specialty utility vehicles used in mining or oil fields
2. Railway Maintenance Equipment: Small railway maintenance vehicles and equipment
Features of John Deere 4045T Diesel Engine
- Turbocharging: The turbocharged design pushes more air into the combustion chamber, improving combustion efficiency, power output, and fuel economy compared to naturally aspirated variants.
- Direct Fuel Injection: Modern 4045T variants use high-pressure common rail direct injection. Older 4045T mechanical variants use a mechanical inline injection pump.
- Robust Construction: Cast iron block and cylinder head construction with replaceable wet liners designed for high-cycle industrial / agricultural duty. The 4045T is engineered for tens of thousands of operating hours of sustained service.
- Advanced Cooling System: The liquid-cooled system maintains optimal engine temperatures even during heavy load operation.
- Emission Control: Different variants conform to various emissions tiers including Tier 2, Tier 3, Tier 4 Interim, and Tier 4 Final. Modern Tier 4 4045HF variants incorporate EGR, DPF, and SCR with DEF for emissions compliance.
- High Power-to-Weight Ratio: The 4045T compact 4-cylinder architecture delivers strong power output (up to 173 hp) while keeping engine weight manageable for mobile equipment applications.
- Versatile Application: Fits an extraordinarily wide range of equipment, from utility tractors to combines to construction machines to industrial generators to marine vessels.
- Easy Maintenance: Service points are accessible for fast inspection and routine maintenance.
- Electronic Control: Modern 4045T variants include electronic control units (ECUs) for precise engine management and diagnostics.
- Fuel Efficiency: The combination of turbocharging, optimized combustion, and modern fuel injection delivers excellent fuel economy.
Condition
Our used John Deere 4045T diesel engines are well-maintained and in excellent working condition. These engines have been previously used in industrial, agricultural, or marine service, with documented donor application and hours/mileage. Each engine is compression-tested, inspected for defects, and prepared for shipping with full documentation.
Signs You Need a Replacement 4045T
- Loss of compression on one or more cylinders
- High-pressure common rail injector failure (later variants) or mechanical injection pump failure (earlier variants)
- Turbocharger failure (boost drop, blue oil smoke, whistle / surge sounds)
- Cylinder head crack symptoms (coolant in oil, white smoke, overheating)
- Connecting rod or main bearing knock under load
- Excessive blow-by or oil consumption
- Donor John Deere equipment retired and the 4045T is being moved to another application
- Generator or industrial repower project requiring proven 4045T reliability
- Marine repower (use 4045TFM marine variant for marine applications)
Common 4045T Maintenance Considerations
- Oil and filter changes: Every 250 to 500 operating hours. John Deere Plus-50 II engine oil or compatible API CK-4 spec recommended.
- Fuel filters: Critical for high-pressure common rail injector longevity; change at every oil interval
- Coolant service: Use John Deere COOL-GARD II or compatible heavy-duty extended life coolant. Service every 2-3 years.
- DEF / DPF service (Tier 4 variants): DEF doser, NOx sensors, and SCR catalyst inspection; DPF ash cleaning at extended intervals
- Valve adjustment: Periodic valve clearance check per John Deere service interval
- Turbocharger inspection: Check shaft play and exhaust housing condition periodically
What Ships and What Does Not
| Item | Details |
|---|---|
| INCLUDED | Long block: cast iron block (with replaceable wet liners), crankshaft, connecting rods, pistons, camshaft, cast iron cylinder head, valve train, oil pan, valve cover. Mechanical injection pump or common rail injectors typically included from donor (variant-dependent). Turbocharger typically included. |
| NOT INCLUDED | ECM (sold separately, application-specific to variant and equipment chassis), wiring harness, intake manifold (typical), exhaust manifold (typical), DPF / SCR / DEF aftertreatment system components (Tier 4 variants, sold separately), starter, alternator, water pump (sometimes), thermostat, transmission (PTO or hydraulic drive), motor mounts. |
| Fluids | Drained before shipping. Refill with John Deere Plus-50 II 15W-40 or compatible API CK-4 spec heavy-duty diesel engine oil. |
| Provenance Note | Donor application disclosed (tractor / combine / construction / generator / marine). Variant authenticated for ECM compatibility (mechanical vs electronic, emissions tier). |
| Core Note | No core charge. You are not required to return your old engine. |
Vehicle Compatibility
The John Deere 4045T fits the following major equipment applications:
| Vehicle | Compatibility |
|---|---|
| Agricultural Tractors | John Deere 5000, 6000, 7000 Series (utility through high-horsepower) |
| Combines | John Deere 9450, 9550 |
| Construction Compact Loaders | John Deere 244J, 304J |
| Construction Excavators | John Deere 75G, 85G |
| Backhoe Loaders | John Deere 310G, 310SG |
| Skid Steers | John Deere 320, 325 |
| Forestry Equipment | John Deere 437D Log Loader, 1010E Forwarder |
| Industrial Generators | Stationary and portable JD 4045T-powered gensets |
| Marine Propulsion | Small commercial / recreational vessels (use 4045TFM marine variant) |
| Industrial Pumps and Compressors | Various industrial applications |
Tell us your specific equipment application and we will match the appropriate 4045T variant.
Inspection Workflow
- All 4 cylinders compression tested, pressure per cylinder recorded
- Variant authenticated (basic 4045T, 4045TF, 4045HF, 4045TFM marine, Tier 4)
- Emissions tier documented (Tier 2 / Tier 3 / Tier 4 Interim / Tier 4 Final)
- Fuel system operation verified (mechanical injection pump or high-pressure common rail)
- Turbocharger inspected for shaft play and bearing wear
- Top-end inspection (head, rocker arms, valve train)
- Cylinder wet liner condition assessed where accessible
- Donor application photographed and documented
- Approximate operating hours documented when verifiable
Why Buy From Part Nests
- All 4 cylinders compression tested, results before you pay
- Variant authenticated (basic 4045T, 4045TF, 4045HF, 4045TFM marine, Tier 4 variants)
- Emissions tier documented
- Fuel system operation verified (mechanical or common rail)
- Turbocharger and aftercooler inspection (where applicable)
- Top-end inspection (head, rocker arms, valve train)
- Wet liner condition assessed (the 4045 defining serviceability feature)
- Donor equipment application traced
- Crated freight delivery to all 50 states for industrial / agricultural engines
- 15 day replacement warranty on internal defects
- John Deere-experienced support team on the phone
- Call (240) 306-7051 to confirm 4045 variant (basic 4045T, 4045TF Tier 2, 4045HF aftercooled, 4045TFM marine-spec, or Tier 4 HF275 / HF285), emissions tier, fuel system (mechanical inline pump or high-pressure common rail), donor equipment, and the marine variant requirement (4045TFM has marine cooling jacket and marine-spec accessories) before ordering
15 Day Replacement Warranty
Every used John Deere 4045T diesel engine purchased through Part Nests carries a 15 day replacement warranty starting on the delivery date.
What Is Covered
- Internal defects already present when the engine arrives
- Compression failures on any of the 4 cylinders beyond what was disclosed
- Cylinder head crack failures within 15 days from installation (where head was documented as crack-free at shipping)
- Mechanical injection pump or high-pressure common rail injector failures within 15 days from installation (where fuel system was documented as functional at shipping)
- Turbocharger failures within 15 days from installation (where turbo was documented as functional at shipping)
- Cylinder wet liner failures within 15 days from installation
- Connecting rod, lifter, or bearing failures within 15 days from installation
- Incorrect variant shipped (basic 4045T vs 4045TF vs 4045HF vs 4045TFM marine vs Tier 4) due to an error on our end
What Is Not Covered
- Damage caused during installation
- Damage from running with contaminated diesel fuel
- Damage from extended oil change intervals or incorrect oil viscosity (John Deere Plus-50 II 15W-40 or compatible API CK-4 spec required)
- Damage from operating with neglected cooling system (use John Deere COOL-GARD II or compatible heavy-duty extended life coolant)
- Damage from running with non-ULSD fuel on Tier 4 variants
- Damage from emissions equipment removal or tampering on Tier 4 variants
- Damage from operating a land-based 4045T variant in a marine application without the marine cooling system upgrade (use 4045TFM marine variant for marine duty)
- Damage from aggressive aftermarket tuning beyond John Deere-approved fuel maps
- External components (ECM if separately documented, fuel injection pump if separately documented, harness, intake manifold, exhaust manifold, DPF / SCR / DEF system, starter, alternator, water pump, thermostat, transmission / PTO / hydraulic drive, motor mounts) unless itemized
- Labor expenses of any kind
To start a warranty claim, reach us within 15 days of delivery at (855) 634-4447.
- All 4 Cylinders Tested: Compression results documented before payment
- Variant Authenticated: Basic 4045T, 4045TF, 4045HF, 4045TFM marine, or Tier 4 documented
- Emissions Tier Documented: Tier 2, Tier 3, Tier 4 Interim, or Tier 4 Final confirmed
- Fuel System Verified: Mechanical inline pump or high-pressure common rail per variant
- Wet Liner Condition Assessed: Defining 4045 serviceability feature documented
- 15 Day Replacement Cover: Internal defects protected from delivery onward
Additional information
| aspiration | Turbocharged |
|---|---|
| bore-x-stroke | 4.19 in x 5.00 in |
| compression-ratio | 17.0:1 |
| configuration | Inline 4-cylinder |
| cooling-system | Liquid-cooled |
| fuel-system | High-pressure common rail direct injection (later variants); mechanical inline pump on older variants |
| valvetrain | OHV, 2 valves per cylinder |
John Deere modern industrial diesel engine family. The PowerTech family is John Deere modern industrial diesel engine lineup, covering a range of displacements from 3.0L to 13.5L with shared engineering philosophy (replaceable wet liners, robust bottom-end, common service architecture). The full family: PowerTech 3029 (3.0 liter Inline-3, smaller applications), PowerTech 4045 (4.5 liter Inline-4, this listing and the workhorse of the family), PowerTech 6068 (6.8 liter Inline-6, larger applications), PowerTech 6090 (9.0 liter Inline-6, heavy-duty applications), PowerTech 6135 / 13.5L (largest PowerTech, heavy industrial / marine). All share the same fundamental architecture with replaceable wet liners, cast iron block, and proven service ability across agricultural, construction, industrial, and marine applications.
Multiple variants across emissions tiers and intended applications. Basic 4045T is the entry-level turbocharged variant covered by this listing. 4045TF is the Tier 2 turbocharged variant common in 2000s production. 4045HT / 4045HF are the turbocharged + aftercooled variants for higher power output. 4045TFM is the MARINE propulsion variant with marine cooling jacket and marine-spec accessories (NOT interchangeable with land-based variants for marine duty). 4045HF275 is the Tier 4 Final high-horsepower current production variant. 4045HF285 is the Tier 4 Final higher output variant. Each sub-variant has different ECM calibration, aftercooling configuration, and emissions hardware.
Marine propulsion specific variant. The 4045TFM is the marine propulsion variant of the 4045 family, distinguished from land-based 4045T variants by marine-specific systems: marine cooling jacket (closed cooling system with heat exchanger or keel cooler instead of land-based radiator); marine-grade alternator and starter (corrosion-resistant); marine-spec exhaust manifold (water-cooled exhaust for marine engine compartment integration); marine ECU calibration (different load profiles than land-based duty cycles). Use the 4045TFM marine variant for marine repower projects; land-based 4045T variants should NOT be used in marine applications without the marine cooling system upgrade. We confirm marine vs land-based donor on every order.
Rebuild without boring the block. The John Deere 4045T uses replaceable wet cylinder liners (also called wet sleeves), which are removable cylinder sleeves directly exposed to engine coolant on their outer surface. At major rebuild, the worn liners are simply pulled out and replaced with new liners and matched pistons; the engine block does not require boring. This is a significant cost and time advantage over conventional dry-block engines where the cylinder bores must be machined oversized. The wet liner design also provides excellent heat transfer to the cooling system, contributing to consistent operating temperatures. The 4045T wet liner architecture is one of the primary reasons agricultural and industrial fleet operators choose the John Deere PowerTech family.
Tier 2, Tier 3, Tier 4 Interim, Tier 4 Final. The John Deere 4045T has been produced across multiple EPA emissions tier compliance levels. Tier 2 (early 2000s production) was the baseline with mechanical injection or early common rail. Tier 3 (mid-2000s) added refined common rail injection and EGR. Tier 4 Interim (late 2000s through 2014) added EGR and DPF (Diesel Particulate Filter) for particulate matter control. Tier 4 Final (2014 onward) added SCR (Selective Catalytic Reduction) with DEF (Diesel Exhaust Fluid) for NOx control. Each tier has different emissions hardware, ECM calibrations, and service requirements. We document the emissions tier on every 4045T we ship.
Extraordinarily wide range across agricultural, construction, industrial, marine, and forestry. Agricultural tractors: John Deere 5000 Series utility tractors, 6000 Series mid-size tractors, 7000 Series high-horsepower tractors. Combines: John Deere 9450, 9550. Construction equipment: 244J / 304J compact loaders, 75G / 85G excavators, 310G / 310SG backhoe loaders, 320 / 325 skid steers. Forestry equipment: 437D Log Loader, 1010E Forwarder. Industrial: stationary and portable generator sets, irrigation / well-service / dewatering pumps, Sullair / Ingersoll-Rand air compressors. Marine propulsion: fishing boats, small commercial workboats, recreational boats (use 4045TFM marine variant). Specialty: mining and oil field utility vehicles, railway maintenance equipment.
John Deere Plus-50 II oil, COOL-GARD II coolant. The John Deere 4045T requires specific oil and coolant for proper operation and warranty preservation. Engine oil: John Deere Plus-50 II 15W-40 (the preferred specification) or compatible API CK-4 / FA-4 spec heavy-duty diesel engine oil. Service interval: every 250-500 operating hours for industrial / agricultural / construction applications. Coolant: John Deere COOL-GARD II (the preferred specification) or compatible heavy-duty extended life coolant. Service interval: every 2-3 years or per equipment operating manual. Using substandard or incorrect oil and coolant in the 4045T accelerates wet liner wear, fuel injector wear, and cooling system corrosion.
No. There is no core return required.
2 reviews for Used John Deere 4045T Diesel Engine for Sale | OEM Used 4.5L PowerTech Turbocharged Inline-4 (Agricultural, Industrial, Marine, Generator)
Related products
Octavius P. –
Got a 4045T for a John Deere 6420 tractor replacement. Variant correctly identified as 4045T (basic turbocharged, NOT the 4045TF Tier 2 or 4045HF aftercooled or 4045TFM marine variant), emissions tier documented as Tier 2, all 4 cylinders compression tested, wet liner condition assessed. Honest pre-purchase information about the John Deere PowerTech family position (4045 I4 in the family with 3029 I3 / 6068 I6 / 6090 I6 / 6135 13.5L siblings) and the John Deere Plus-50 II oil specification.
Genevieve A. –
Sourced a 4045TFM marine variant for a fishing boat repower. Variant correctly identified as 4045TFM marine (NOT a land-based 4045T which would lack marine cooling jacket and marine-spec accessories), all 4 cylinders compression tested, marine cooling jacket inspection documented. Honest pre-purchase information about the marine variant being non-interchangeable with land-based variants for marine duty and the replaceable wet liner serviceability advantage.