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Order before 3PM EST and receive your order in 2-3 business days! – some exclusions apply. 
3-Year / Unlimited-Mile Parts & Labor Nationwide Warranty— up to 5-Year / Unlimited-Mile No-Fault available12 months of coverage
1-Year
No-Fault Warranty
$99.00
- One-time free replacement, no matter the cause of failure.
- Unlimited miles during the 1-year term.
- $50/hr labor coverage using Mitchell or AllData book time.
Fraser Engines · 3.7L Jeep Engine Program
Remanufactured 3.7L Jeep Engines
Built for long-term reliability. Premium replacement 3.7L V6 engines for the Jeep Liberty, Grand Cherokee, Commander, Dodge Dakota, Ram 1500, Durango, Nitro, Chrysler Aspen and related applications. The 3.7L is a proven platform, but high mileage, overheating, oiling issues, timing wear and cylinder head concerns eventually lead to major failure.
- Zero-Mileage Remanufactured Build
- Valve Seats Machined
- New Timing Components
- Up to 5-Yr / Unlimited Warranty
- Free Core Pickup
Quick Answer: Where to Buy a Remanufactured 3.7L Jeep Engine
Fraser Engines, trusted since 1961, sells zero-mile remanufactured 3.7L PowerTech V6 engines for the 2002–2012 Jeep Liberty, 2005–2010 Jeep Grand Cherokee, 2006–2010 Jeep Commander, 2002–2012 Dodge Ram 1500, 2004–2011 Dodge Dakota, 2004–2009 Dodge Durango and 2007–2011 Dodge Nitro. Every engine is torn down to the bare block, precision machined, and built with remanufactured heads (pressure tested, resurfaced, valve seats machined) plus new pistons, rings, bearings, timing components, oil pump, gaskets and seals.
The Standard Remanufactured option includes a 3-year / unlimited-mile parts and labor warranty. The Fraser Advantage™ option adds all applicable TSB updates and a 5-year / unlimited-mile warranty plus 1 year of free No-Fault. Labor is reimbursed at Mitchell or ALLDATA book time. Call 800-731-3177 (press 1 for sales).
3.7L Jeep fitment matters
Vehicle Applications and VIN-Based Fitment
Jeep 3.7L fitment varies by VIN, model year, emissions package, sensor configuration, drivetrain, transmission pairing and engine generation. Fraser recommends VIN verification before purchase to make sure the correct replacement engine is quoted for your vehicle.
Jeep Liberty
Jeep Grand Cherokee
Jeep Commander
Dodge Dakota
Dodge Ram 1500
Dodge Durango
Dodge Nitro
Chrysler Aspen
| Make | Model | Years | Engine | Notes |
|---|---|---|---|---|
| Jeep | Liberty | 2002–2012 | 3.7L PowerTech V6 | KJ (2002–2007) and KK (2008–2012); confirm by VIN |
| Jeep | Grand Cherokee | 2005–2010 | 3.7L PowerTech V6 | WK base V6; confirm by VIN |
| Jeep | Commander | 2006–2010 | 3.7L PowerTech V6 | XK base V6 |
| Dodge | Dakota | 2004–2011 | 3.7L PowerTech V6 | Confirm emissions package by VIN |
| Dodge / Ram | Ram 1500 | 2002–2012 | 3.7L PowerTech V6 | Base V6 applications |
| Dodge | Durango | 2004–2009 | 3.7L PowerTech V6 | Base V6 applications |
| Dodge | Nitro | 2007–2011 | 3.7L PowerTech V6 | Shares Liberty KK platform |
| Chrysler | Aspen | Confirm by VIN | 3.7L PowerTech V6 | Shares Durango platform |
| Mitsubishi | Raider | 2006–2009 | 3.7L PowerTech V6 | Shares Dakota platform |
VIN-specific matching: have your full 17-character VIN ready so our team can match the exact 3.7L replacement engine for your vehicle.
3.7L PowerTech V6 Specifications
| Specification | 3.7L PowerTech V6 (EKG) |
|---|---|
| Displacement | 3.7L / 3,698 cc / 226 cu in |
| Configuration | 90-degree V6, single overhead cam, 12 valves |
| Bore × stroke | 93.0 mm × 90.7 mm (3.66 in × 3.57 in) |
| Block / heads | Cast-iron block, aluminum heads |
| Balance shaft | Counter-rotating, between cylinder banks |
| Timing drive | Timing chains |
| Factory output | About 210 hp / 235 lb-ft |
| Production years | 2002–2012 |
The 3.7L Dropped Valve Seat Problem
Why it happens, and why it's usually the end of the engine
The 3.7L uses an iron block with aluminum cylinder heads. When the engine overheats, the aluminum head expands more than the hardened valve seats pressed into it. A seat can come loose and drop into the combustion chamber, where the valve and piston hit it. The result is a sudden misfire, loud noise and, often, a destroyed head, piston or cylinder wall.
A used 3.7L with any overheating history carries the same risk. Every Fraser 3.7L gets remanufactured cylinder heads that are pressure tested and resurfaced, with valve seats machined, so you start with a sound top end.
Know the warning signs
Common 3.7L Jeep Engine Problems
As these Jeeps and Dodges age, common failure points get more expensive to ignore. Most customers start searching for a replacement after overheating, dropped valve seats, timing chain noise, oil pressure concerns or low compression.
Dropped valve seat
Overheating and cylinder head stress contribute to valve seat failure and catastrophic engine damage.
Overheating damage
Cooling neglect, radiator issues, thermostat or water pump failure damage cylinder heads and gaskets.
Timing chain and guide wear
High-mileage engines develop chain noise, timing faults, rough running or drivability problems.
Oil pressure and bearing wear
Low oil pressure, neglected maintenance or internal wear leads to knocking or bottom-end failure.
Misfires and compression loss
Burned valves, head damage, worn rings or cylinder sealing problems cause persistent misfires.
High-mileage gasket leaks
Valve cover, oil pan, rear main and intake sealing leaks are common on older 3.7L platforms.
Diagnose first
Repair or Replace? Signs You Need a 3.7L Jeep Engine
Some 3.7L issues can be repaired externally, but severe overheating, internal noise, low compression, dropped valve seat damage or oil pressure failure make a replacement engine the better long-term repair.
- Knocking, ticking, rattling or internal noise
- Overheating damage or repeated coolant loss
- Low compression or failed leak-down test
- Misfires that continue after ignition and fuel repairs
- Timing chain rattle or timing fault codes
- Oil pressure warnings or metal in the oil
- Coolant mixing with oil or a failed head gasket
- Replacement recommended by a licensed repair shop
Choose Your 3.7L Option
Option 1 · Standard Remanufactured
3 Years / Unlimited Miles
Fully remanufactured 3.7L with remanufactured heads and new wear components. Parts and labor nationwide warranty, with No-Fault upgrades available at checkout.
Option 2 · Fraser Advantage™ · Included
5 Years / Unlimited Miles
Everything in Option 1, plus every applicable OEM and aftermarket TSB update applied. Parts and labor nationwide PLUS 1 year of FREE No-Fault coverage.
Fraser handles warranty claims directly with engine specialists, not call-center reps. Labor is reimbursed using Mitchell or ALLDATA book time. Optional No-Fault upgrades from 1 to 5 years are available on either option. Coverage, labor reimbursement, eligibility, exclusions and claim procedures are governed by Fraser Engines' written warranty agreement.
True remanufacturing, not a budget rebuild
How Your Fraser 3.7L Is Built
Every Fraser 3.7L is torn down to the bare block and rebuilt in a controlled, multi-step process. Choose the Fraser Advantage™ option and every applicable OEM and aftermarket Technical Service Bulletin update is applied, so known weak points are corrected before the engine ships.
- Complete teardown to the bare block and industrial cleaning.
- Precision-machined block built to OEM or tighter tolerances.
- Remanufactured cylinder heads: pressure tested, resurfaced, valve seats machined.
- New pistons, rings and bearings installed to factory-clearance specs.
- New timing components to improve durability.
- New oil pump for proper lubrication and oil pressure.
- New gaskets and seals throughout to prevent leaks.
- Balanced and tested rotating assembly and final quality inspection.
Used engines
Unknown mileage, overheating history and cylinder head condition.
Cheap rebuilds
Reuse marginal parts and skip the updates. The same failure comes back.
Fraser remanufactured
Fully remanufactured, VIN-verified fitment, and up to a 5-year warranty with free No-Fault on Fraser Advantage™.
The Fraser Advantage™
A Better Alternative to Another Used 3.7L Engine
A used 3.7L Jeep engine is risky. Most donors already have high mileage, overheating history, oil leaks or cylinder head wear. Fraser remanufactured 3.7L engines are professionally renewed with direct-replacement fitment support and warranty options, so you repair the vehicle correctly the first time.
- Zero-mileage build, not a questionable salvage engine
- Updated internal components for long-term reliability
- Professionally remanufactured block and cylinder heads
- Direct-replacement fitment for Jeep, Dodge and Chrysler
- Powertrain specialists: engines and transmissions every day
- VIN-based quotes to identify the correct 3.7L
- Shipping to commercial repair shops for easy unloading
- Core return assistance with pickup after install
Know the difference
Used 3.7L vs. Low-Cost Rebuild vs. Fraser Remanufactured
A used 3.7L may come from a donor with unknown mileage, previous overheating, poor maintenance, oiling damage or existing cylinder head concerns. Even if it runs today, internal wear may already be developing beneath the surface. Instead of gambling, you receive a professionally renewed replacement backed by Fraser's support.
| Feature | Used Salvage Engine | Low-Cost Rebuild | Fraser Remanufactured |
|---|---|---|---|
| Internal mileage | Prior service mileage; unknown | Varies | Zero miles since remanufacture |
| Factory updates (TSBs) | None | Rarely | All applicable updates applied on Fraser Advantage™ |
| Cylinder head / valve seat condition | Unknown overheating history | Often reused | Remanufactured heads, pressure tested and resurfaced |
| Internal components | Existing wear | Reuses marginal parts | New pistons, rings, bearings, timing, oil pump, gaskets and seals |
| Machine work | None | Minimal | Precision-machined block; heads pressure-tested and resurfaced |
| Fitment verification | Varies | Varies | VIN-based verification before shipment |
| Warranty | Varies / none | Short-term | 3-Yr (Standard) or 5-Yr + 1-Yr No-Fault (Fraser Advantage™) |
| Core return | Varies | Varies | Free commercial pickup with Fraser support |
3.7L Installation Tips to Prevent Overheating
- Replace or flush the radiator
- Replace the water pump, thermostat and hoses
- Check the fan clutch or electric fan
- Replace the radiator cap
- Bleed all air from the cooling system
- Prime the oil system before first start
- Watch the temperature gauge during break-in
- Change oil after the first 500 miles
Overheating is the root cause of most 3.7L failures. Your engine ships with Fraser's installation guidelines. Follow them closely and keep your receipts to keep your warranty in force.
How to Order Your 3.7L Jeep Engine
- Send your VIN. Use the Fast Quote form, call 800-731-3177 (press 1), or text (586) 284-4941.
- Pick your option. A product specialist confirms fitment and helps you choose Standard or Fraser Advantage™.
- Ship to your shop. In-stock engines ship the same day when ordered before 3 PM EST.
- Install and return the core. Fraser coordinates free commercial core pickup after installation.
Answers before you order
3.7L Jeep Engine Replacement FAQs
Is a remanufactured 3.7L Jeep engine better than a used engine?
Yes. Most used 3.7L engines have high mileage, overheating history, oil leaks or head wear that can lead to a dropped valve seat. A Fraser remanufactured 3.7L is zero-mile with remanufactured heads, new internal and timing parts, and up to a 5-year / unlimited-mile warranty with free No-Fault on Fraser Advantage™.
What are common 3.7L Jeep engine problems?
Dropped valve seats, overheating damage, timing chain and guide wear, low oil pressure and bearing wear, misfires and compression loss, and gasket leaks.
What is a dropped valve seat?
After overheating, a valve seat can come loose from the aluminum head and get struck by the valve and piston, causing a sudden misfire and often catastrophic damage. Fraser heads are pressure tested and resurfaced with valve seats machined.
Does Fraser help verify 3.7L Jeep engine fitment?
Yes. Fitment varies by VIN, year, emissions package, sensors, drivetrain, transmission and engine generation, so we confirm it from your VIN before purchase.
Can Fraser ship my 3.7L Jeep engine to my repair shop?
Yes. We ship directly to commercial repair facilities, free in the continental U.S., and coordinate free commercial core pickup after installation.
Is a No-Fault warranty upgrade available?
Yes. Optional No-Fault upgrades from 1 to 5 years are available on either option, and Fraser Advantage™ already includes 1 year of free No-Fault coverage.
What's the difference between the Standard and Fraser Advantage™ options?
Standard is a fully remanufactured 3.7L with a 3-year / unlimited-mile warranty. Fraser Advantage™ adds every applicable OEM and aftermarket TSB update, plus a 5-year / unlimited-mile warranty and 1 year of free No-Fault coverage.
Get Your 3.7L Jeep Engine Today
Talk to a product specialist Mon–Fri 8 AM–5 PM EST, or request a quote online 24/7.
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