Fraser Engines & Transmissions · 4.0L inline-six Engine Program
4.0L Jeep Engines
& Stroker Options
Get your Jeep back on the road with a remanufactured 4.0L replacement engine. Compare the OEM-spec 4.0L, Fraser Advantage 4.0L, and 4.0L/4.7L stroker packages. Review the included components and warranty coverage, then order with expert VIN matching.
Three remanufactured engine options
Please Select Configuration
Choose your preferred build and coverage. Fraser verifies the correct engine configuration for your vehicle before processing.
Click image to enlarge. Confirm supplied components for your application.
In Stock · 2 Units Left*SKU: FEF40JS
Free commercial shipping & core pickup*
No upfront core charge on eligible orders*
Press 1 for Sales · Monday–Friday, 8 AM–5 PM ET.
Fraser Engines – Remanufactured OEM-Spec 4.0L Jeep Engine Assembly
Restore your vehicle with an OEM-spec remanufactured 4.0L inline-six engine. This package includes a remanufactured block and cylinder head, new internal wear components, a balanced and tested rotating assembly, and an oil pump. Includes a 3-year/unlimited-mile nationwide parts and labor warranty, subject to written terms.
What’s Included?
- Remanufactured engine block
- Remanufactured cylinder head
- New pistons
- New piston rings
- New bearings
- Balanced & tested rotating assembly
- New timing components
- New gaskets & seals
- Oil pump
Provide SKU FEF40JS and your full VIN. Fraser confirms the correct assembly and your selected options before processing.
Click image to enlarge. Confirm supplied components for your application.
In Stock · 3 Units Left*SKU: FEJ40R-HD
Free commercial shipping & core pickup*
No upfront core charge on eligible orders*
Press 1 for Sales · Monday–Friday, 8 AM–5 PM ET.
Fraser Advantage – Remanufactured 4.0L Jeep Engine Assembly + TSB Updates
Choose a Fraser Advantage remanufactured 4.0L inline-six with an upgraded engine block, updated cylinder head, and all applicable major OEM and aftermarket technical service bulletin updates. Includes a 5-year/unlimited-mile nationwide parts and labor warranty plus 1 year of No-Fault coverage free, subject to written terms.
What’s Included?
- Remanufactured & upgraded engine block
- Remanufactured & updated cylinder head
- New pistons
- New piston rings
- New bearings
- Balanced & tested rotating assembly
- New timing components
- New gaskets & seals
- Oil pump
- All applicable major OEM & aftermarket TSB updates
Provide SKU FEJ40R-HD and your full VIN. Fraser confirms the correct assembly and your selected options before processing.
Click image to enlarge. Confirm supplied components for your application.
In Stock · 1 Unit Left*SKU: FEJ4047STR-HD
Free commercial shipping & core pickup*
No upfront core charge on eligible orders*
Press 1 for Sales · Monday–Friday, 8 AM–5 PM ET.
Fraser Advantage – Remanufactured 4.0L / 4.7L Stroker Jeep Engine Assembly + TSB Updates
Choose the listed Fraser Advantage 4.0L-based 4.7L stroker package with an upgraded block, updated cylinder head, new wear components, and applicable major TSB updates. Includes a 5-year/unlimited-mile nationwide parts and labor warranty plus 1 year of No-Fault coverage free, subject to written terms. Confirm the final build specification and installation requirements before ordering.
What’s Included?
- Remanufactured & upgraded engine block
- Remanufactured & updated cylinder head
- New pistons
- New piston rings
- New bearings
- Balanced & tested rotating assembly
- New timing components
- New gaskets & seals
- Oil pump
- All applicable major OEM & aftermarket TSB updates
Provide SKU FEJ4047STR-HD and your full VIN. Fraser confirms the correct assembly and your selected options before processing.
Price, build & coverage
Compare Your 4.0L Jeep & Stroker Options
| Feature | Option 1 · OEM Spec | Option 2 · Advantage | Option 3 · Stroker |
|---|---|---|---|
| Engine price | $2,399.00 | $2,999.00 | $4,599.00 |
| SKU | FEF40JS | FEJ40R-HD | FEJ4047STR-HD |
| Package | OEM-spec 4.0L | Fraser Advantage 4.0L | Fraser Advantage 4.0L / 4.7L stroker |
| Condition | Remanufactured | Remanufactured | Remanufactured |
| Nationwide parts & labor warranty* | 3 years / unlimited miles | 5 years / unlimited miles | 5 years / unlimited miles |
| Included No-Fault protection | Available as an upgrade | 1 year FREE | 1 year FREE |
| Engine block & cylinder head | Remanufactured | Remanufactured with listed updates | Remanufactured with listed updates |
| Pistons, rings, bearings & timing components | New | New | New |
| Gaskets, seals & oil pump | Included | Included | Included |
| Major applicable OEM & aftermarket TSB updates | OEM-spec build | Included with Advantage | Included with Advantage |
| Before ordering | Verify VIN and configuration | Verify VIN and configuration | Verify VIN, final build, fuel and calibration requirements |
All packages require application confirmation. Review the supplied components, installation requirements, and written warranty with your installer.
Fraser Engines protection options
Protect Your Investment
Add optional coverage and installation products when placing your order. A Fraser Product Specialist will confirm all selections before processing.
No-Fault Warranty Upgrades
1-Year
No-Fault
First-year protection
$99.002-Year
No-Fault
Two years of coverage
$199.003-Year
No-Fault
Three years of coverage
$299.004-Year
No-Fault
Premium Pay benefits
$399.005-Year
Elite Maxx
No-Fault + Premium Pay
$499.00Both Fraser Advantage options already include 1 year of No-Fault coverage free. Confirm upgrade eligibility and pricing with Sales; coverage periods do not automatically add together.
Premium Installation Kit
Commonly recommended replacement components to support a professional engine installation. Contents and availability vary by application.
$250.00Premium Engine Break-In Oil
Formulated to help protect critical engine components during initial break-in and support proper ring seating. Follow the engine’s supplied instructions.
$49.99Warranty coverage, labor reimbursement, eligibility, limitations, and claims are governed by Fraser’s written warranty terms.
Choose your Jeep engine package
Remanufactured 4.0L Jeep Inline-Six Engines
Shopping for a Jeep Wrangler 4.0L engine, a Cherokee replacement, a Grand Cherokee engine, or a Comanche inline-six starts with the original vehicle configuration. Fraser offers a choice of remanufactured packages with specified components, fitment support, shipping coordination, and written warranty coverage.
The OEM-spec and Fraser Advantage 4.0L listings provide two replacement choices. The listed 4.0L/4.7L stroker adds a performance-build option that should be reviewed with your installer for the vehicle’s fuel, controls, and installation requirements.
OEM-Spec Replacement
The standard 4.0L package includes a remanufactured block and cylinder head, new internal wear components, a balanced and tested rotating assembly, and an oil pump.
Fraser Advantage Updates
The Advantage packages specify an upgraded block, updated cylinder head, and applicable major OEM and aftermarket TSB updates. Ask which updates apply to the confirmed build.
4.0L-Based Stroker Package
Review the final displacement, component specification, fuel requirements, calibration needs, and available documentation with Sales before selecting the stroker.
Match your exact Jeep
4.0L Jeep Wrangler, Cherokee, Grand Cherokee & Comanche Fitment
These model groups include selected 4.0L inline-six applications. They do not establish that every model year, casting, or complete assembly is interchangeable. Fraser verifies the appropriate configuration using your full 17-character VIN and original engine details.
| Vehicle | Application | Before Ordering |
|---|---|---|
| Jeep Wrangler | Selected factory 4.0L inline-six applications | Verify model year, full VIN, head design, and original equipment |
| Jeep Cherokee | Selected factory 4.0L inline-six applications | Confirm block, cylinder head, sensors, and accessory configuration |
| Jeep Grand Cherokee | Selected factory 4.0L inline-six applications | Confirm model year, engine identification, and transmission pairing |
| Jeep Comanche | Selected factory 4.0L inline-six applications | Verify original engine version, controls, and emissions equipment |
| Other AMC / Jeep inline-six inquiries | Separate application check required | Provide exact model, year, VIN, and any swap or modification details |
Review the performance package
Considering a 4.0L / 4.7L Jeep Stroker?
Option 3 is the listed Fraser Advantage stroker package based on the Jeep inline-six platform. Before ordering, have Sales and your installer review the final engine specification alongside the vehicle’s intended use and existing equipment.
Confirm the Engine Build
Request the final displacement, rotating-assembly and camshaft specifications, supplied components, and any available test documentation. This listing does not specify a horsepower or torque rating.
Confirm Installation Requirements
Review the required fuel, injectors or fuel-system components, calibration, accessories, and transmission compatibility. The confirmed order determines which parts and services are supplied.
Photos illustrate the engine offering. A pictured accessory is included only when it appears in your confirmed component list.
Address the cause of failure
4.0L Engine Problems to Discuss With Your Installer
Overheating, internal noise, low compression, or an oil-pressure warning can prompt a search for a replacement 4.0L engine. Have a qualified repair facility establish the cause and extent of the damage before deciding on an engine replacement.
Overheating & Coolant Loss
Have the shop inspect the cooling system and check for cylinder-head or gasket damage. Related cooling-system repairs should be addressed as part of the installation plan.
Cylinder-Head Concerns
Have the shop investigate suspected cracks, coolant contamination, or sealing problems. Confirm the cylinder-head specification and applicable updates for your replacement assembly.
Timing-System Noise
Rattling or timing-related faults need diagnosis. All three listed engine packages include new timing components; your installer should verify all required vehicle-side repairs.
Oil Pressure & Bearing Wear
Low oil pressure, knocking, or contamination calls for diagnosis of lubrication and internal condition. Identify the original failure before installing the replacement.
Misfires & Compression Loss
Persistent misfires can have several causes. Compression and leak-down testing can help the shop distinguish internal damage from ignition, fuel, or control-system concerns.
Leaks & External Components
Review covers, seals, cooling parts, intake components, and accessories with the installer. The confirmed order determines which parts arrive with the engine.
Review condition, parts & coverage
Used vs. Remanufactured 4.0L Engines
A used 4.0L engine carries the condition and service history of its donor assembly. All three Fraser packages specify a remanufactured block and head plus new internal wear components, a balanced and tested rotating assembly, and stated warranty coverage.
Compare the Complete Repair
Review the engine price alongside supplied parts, installation labor, related repairs, freight, core requirements, and warranty coverage. Ask for the exact component list before arranging installation.
Understand Zero-Mile Remanufacturing
Zero-mile describes service mileage since remanufacturing. The assembly contains the specified renewed and replacement components; it is not a claim that every casting is newly manufactured.
Choose your protection
Nationwide Warranty Coverage for Your 4.0L Engine
OEM Spec: 3 Years / Unlimited Miles
The standard remanufactured package includes nationwide parts and labor coverage, subject to Fraser’s written warranty. Optional No-Fault coverage is available with purchase.
Options 2 & 3: 5 Years / Unlimited Miles
Both Fraser Advantage packages include nationwide parts and labor coverage plus 1 year of No-Fault coverage free. Review available upgrades with Sales before selecting additional protection.
Warranty terms govern eligibility, labor reimbursement, maintenance, limitations, exclusions, and claims. DIY installations receive parts-only coverage. Review the Warranty Center and request the terms for your confirmed assembly.
Coordinate delivery and return
Commercial Shipping & Core Return Support
Free Commercial Shipping & Core Pickup
The offer applies to qualifying commercial addresses in the continental United States. Confirm the delivery address, unloading arrangements, and any residential, liftgate, or special-service charges before processing.
No Upfront Core Charge on Eligible Orders
A qualifying original core must still be returned under the order agreement. Sales confirms eligibility, any waiver terms, the return deadline, and pickup arrangements.
Plan the complete repair
Prepare for Your 4.0L Engine Installation
- Confirm the assembly and parts. Match the supplied-component list to your installer’s estimate and identify external parts needed for the job.
- Resolve the original failure. Have the repair facility address related cooling, lubrication, fuel, ignition, or control-system problems as appropriate.
- Follow the supplied instructions. Use the specified fluids, installation procedures, and break-in requirements for the confirmed engine. Keep installation and maintenance records for warranty support.
Online ordering available 24/7
Order Your 4.0L Jeep Engine
- Choose your build. Select OEM-spec at $2,399, Fraser Advantage at $2,999, or the 4.0L/4.7L stroker at $4,599. Have your full VIN ready.
- Complete the order form. Reference FEF40JS for option 1, FEJ40R-HD for option 2, or FEJ4047STR-HD for option 3. Include delivery details and any desired coverage or installation add-ons.
- Verbally verify your order. Call 800-731-3177 and press 1 for Sales to confirm the assembly, availability, shipping, core requirements, selections, and final total.
Payment is not charged until your order is verbally verified.
Answers before you order
4.0L Jeep Engine FAQs
How much does a remanufactured 4.0L Jeep engine cost?
The OEM-spec engine is $2,399.00, SKU FEF40JS. Fraser Advantage with applicable TSB updates is $2,999.00, SKU FEJ40R-HD. The Fraser Advantage 4.0L/4.7L stroker is $4,599.00, SKU FEJ4047STR-HD. Fraser confirms application, availability, selected options, taxes, and fees before processing.
What is the difference between the three engine options?
Option 1 is the OEM-spec remanufactured 4.0L with a 3-year/unlimited-mile nationwide parts and labor warranty. Option 2 is the Fraser Advantage 4.0L with an upgraded block, updated head, applicable major TSB updates, and 5-year/unlimited-mile nationwide parts and labor coverage plus 1 year of No-Fault coverage free. Option 3 is the listed 4.0L-based 4.7L stroker package with the same stated Advantage warranty and No-Fault coverage.
What is the 4.0L/4.7L Jeep stroker option?
It is the listed Fraser Advantage performance package based on the Jeep inline-six platform. Confirm the final displacement, rotating-assembly specification, camshaft, fuel requirements, calibration needs, and compatibility with your vehicle before ordering. The selected build and written order define what is supplied.
Does the stroker listing include a guaranteed horsepower rating?
No specific horsepower or torque rating is stated in this listing. Ask Sales for the confirmed build specifications and any available test documentation. The product photo does not establish displacement, output, or included external accessories.
Will all three options fit my Jeep?
Fraser must verify the correct configuration for your VIN, original engine, and vehicle setup. The stroker also requires a review of its build and installation requirements. Do not select an assembly solely by displacement or assume every version is interchangeable.
Which Jeep models have 4.0L engine applications?
Selected Jeep Wrangler, Cherokee, Grand Cherokee, and Comanche models used the 4.0L inline-six. Exact fitment depends on model year, block and head configuration, sensors, emissions equipment, accessories, and transmission pairing. Provide the full VIN and tell Sales about prior engine swaps.
What comes with the remanufactured Jeep engine?
All three listings include an engine block, cylinder head, new pistons, rings, bearings, timing components, gaskets and seals, a balanced and tested rotating assembly, and an oil pump. The Advantage packages specify an upgraded block, updated head, and applicable major TSB updates. Confirm oil pan, covers, water pump, intake, fuel-system parts, sensors, wiring, and other accessories separately.
What 4.0L engine problems should my installer investigate?
Have the shop diagnose suspected cylinder-head cracking, overheating, coolant contamination, oil leaks, low oil pressure, bearing wear, piston or cylinder wear, compression loss, and timing or valvetrain noise. Symptoms require inspection and do not by themselves establish that a complete engine replacement is needed.
How does a remanufactured 4.0L engine compare with a used engine?
A used engine retains the condition and service history of its donor assembly. These remanufactured packages specify renewed block and cylinder-head components plus new wear parts. Compare supplied components, documented condition, installation work, core terms, shipping, and written coverage.
What warranty comes with each option?
Option 1 includes 3 years/unlimited miles of nationwide parts and labor coverage. Options 2 and 3 include 5 years/unlimited miles of nationwide parts and labor coverage plus 1 year of No-Fault coverage free. Written terms govern eligibility, labor reimbursement, limitations, exclusions, and claims. DIY installations receive parts-only coverage.
Can I add No-Fault coverage and installation products?
Listed No-Fault options are $99 for 1 year, $199 for 2 years, $299 for 3 years, $399 for 4 years with Premium Pay, and $499 for 5-year Elite Maxx with Premium Pay. The Premium Installation Kit is $250 and Premium Engine Break-In Oil is $49.99. Options 2 and 3 already include 1 year of No-Fault coverage; Sales confirms the appropriate upgrade and final pricing.
Is shipping free, and do I still return my core?
The offer includes shipping and core pickup to qualifying commercial addresses in the continental United States. Eligible orders have no upfront core charge, but a qualifying original core must still be returned under the order agreement. Confirm any waiver terms, return deadline, and residential or liftgate charges with Sales.
What does zero-mile remanufactured mean?
Zero-mile refers to service mileage since remanufacturing. It describes a renewed assembly with the specified components, rather than a claim that every casting is a brand-new factory part.
How do I order, and when is payment charged?
Use a Buy Now / Place Order button to open the Fraser order form. Provide the selected SKU, full VIN, delivery details, and desired options, then call 800-731-3177 and press 1 for Sales to confirm your order. Payment is not charged until your order is verbally verified.
Ready to Replace Your 4.0L Engine?
Choose your build and get help with fitment, coverage, shipping, and core return from a Fraser Product Specialist.
800-731-3177 · Press 1 for Sales · Monday–Friday, 8 AM–5 PM ET.