FORD 5F9Z6250AA Right Rear Cylinder Head 306-01939 3.0L

( Manufacturer Part Number: 5F9Z6250AA ), ( Model: FORD-500 ), ( Type: Cylinder Head Assembly ), ( Manufacturer Warranty: 1 Month ), ( Ipn: 306-01939 ), ( Id: 141b4a8c-d6b8-46a1-8c76-65eff37c1046 ), ( Interchange: 306-1939 )

Review FORD 3.0l Right Rear Cylinder Head fits FREESTYLE 500 2005–2007

The **Ford 5F9Z6250AA (2005 2007 Ford 500/Freestyle 3.0L Right Rear Cylinder Head)** is a precision-engineered component designed to deliver reliable performance and durability in Ford s iconic 3.0L Duratec V6 engine, which powers the 2005 through 2007 model years of the Ford 500 and Freestyle SUVs. This right-rear cylinder head, part of the engine s critical cooling and combustion system, is crafted from high-quality cast iron, ensuring robust structural integrity while maintaining optimal heat dissipation to prevent overheating and engine stress. The head features a **four-valve-per-cylinder design**, with each cylinder incorporating two intake and two exhaust valves, allowing for efficient airflow and improved combustion efficiency. The valves are operated by a **single overhead camshaft (SOHC)**, which drives the valve lifters via pushrods, ensuring smooth and precise valve movement for optimal engine performance. The cylinder head is equipped with **hydraulic valve lifters**, eliminating the need for manual adjustment and reducing wear over time, while the **intake and exhaust ports** are meticulously machined to maximize airflow and enhance engine breathing, contributing to better throttle response and fuel economy.

This cylinder head is also designed with **integrated cooling passages** that work in tandem with the engine s water pump and thermostat to regulate temperature, preventing thermal expansion that could compromise sealing or valve operation. The **spark plug wells** are strategically placed to ensure even ignition distribution, while the **camshaft cover** is securely fastened with high-torque bolts to prevent vibration-induced wear. The **oil control rings** and **valve guides** are engineered to minimize oil consumption and friction, further extending the engine s lifespan. Whether used in a restoration project, performance upgrade, or routine maintenance, this **OEM-replacement cylinder head** ensures compatibility with the original engine specifications, maintaining the 3.0L Duratec s reputation for smooth operation and dependability. Built to meet Ford s exacting standards, this component is a critical replacement part for owners seeking to restore factory performance or upgrade their vehicle s power output while preserving reliability.

### Pros and Cons of Buying a Ford 5F9Z6250AA (2005 2007 500/500 Freestyle 3.0L Right Rear Cylinder Head)

1. **Common and Widely Available** The 3.0L Duratec V6 engine (used in the 2005 2007 Ford 500/500 Freestyle) is a well-documented and widely supported platform. Parts, manuals, and aftermarket support are readily available, making repairs and modifications easier.

2. **Proven Reliability** When properly maintained, the 3.0L Duratec V6 is known for durability. Many examples have exceeded 200,000 miles with basic upkeep. The engine is a naturally aspirated design without major flaws if kept in good condition.

3. **Mod Potential** The 3.0L Duratec is a popular choice for engine swaps and performance tuning. Aftermarket support includes performance chips, turbo kits, and even full engine rebuilds. The stock engine can be pushed to 300 horsepower with relatively simple modifications.

4. **Affordable Parts and Labor** Since this is an older model, labor costs for repairs are generally lower than newer vehicles. Parts like cylinder heads, gaskets, and timing components are inexpensive compared to modern equivalents.

5. **Good for Beginners** The simplicity of the 3.0L Duratec makes it a good learning platform for those new to engine work. Many mechanics and DIYers are familiar with its internals.

6. **Stock Performance** The stock 3.0L produces around 170 180 horsepower, which is adequate for daily driving and light towing (up to 3,500 lbs with proper setup). It s not a high-performance engine, but it s not weak either.

7. **Compatibility with Other Models** The 3.0L Duratec is also used in other Ford vehicles (e.g., Focus, Fusion, Escape), expanding the pool of available parts and support.

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1. **Timing Chain Issues** Some 3.0L Duratec engines (particularly in later years) have had timing chain stretch or guide wear problems. If the vehicle hasn t been maintained properly, this could lead to catastrophic engine failure if the chain jumps. Regular inspection and replacement of the timing chain kit (every 60,000 100,000 miles) is recommended.

2. **Oil Leaks** The valve cover gasket, oil filter housing gasket, and rear main seal are common leak points. These are relatively easy to fix but require attention to prevent oil contamination and sludge buildup.

3. **Head Gasket Failures** While not as common as in some other engines, head gasket leaks can occur, especially if the engine overheats or is run with poor maintenance. Signs include white smoke from the exhaust, coolant in the oil, or a hissing sound near the head.

4. **Transmission Concerns** The 5-speed automatic transmission (5R55) in these models can be finicky. Band wear, solenoid issues, and rough shifting are common problems. A rebuild or replacement may be needed if the transmission isn t maintained.

5. **Electrical Gremlins** Like many Ford vehicles from this era, the 2005 2007 500/500 Freestyle can suffer from electrical issues, such as faulty sensors, wiring problems, or intermittent problems with the infotainment system.

6. **Rust and Corrosion** If the vehicle has been exposed to harsh weather or poor storage conditions, rust can be a problem, particularly in the wheel wells, undercarriage, and frame. A thorough inspection is necessary before purchase.

7. **Depreciation** The 500/500 Freestyle is not a highly sought-after vehicle, and its value has depreciated significantly over time. If you re buying it for long-term ownership, expect to spend more on repairs than you would on a more popular model.

8. **Stock Suspension and Handling** The suspension is basic and not tuned for performance driving. If you plan to use the vehicle for spirited driving, upgrading the suspension, tires, and brakes will be necessary.

9. **Fuel Economy** The 3.0L V6 is not fuel-efficient by modern standards, averaging around 18 22 MPG in the city and 26 30 MPG on the highway. This can add up in fuel costs over time.

10. **Recall and Safety Issues** Some 2005 2007 models may have unaddressed recalls or safety concerns. Always check the vehicle s history for open recalls before purchasing.

---

The **Ford 5F9Z6250AA (2005 2007 500/500 Freestyle 3.0L right rear cylinder head)** is a **solid, budget-friendly engine** with **plenty of mod potential** and **good reliability if maintained**. It s an excellent choice for **DIY enthusiasts, project cars, or those looking for a simple, affordable powerplant** for a swap or restoration. However, it s not without its **potential pitfalls**, particularly with **timing chain wear, transmission issues, and electrical quirks**.

If you re buying this cylinder head (or the entire engine) for a **project or swap**, the pros heavily outweigh the cons, especially if you re prepared for basic maintenance. If you re buying the **entire vehicle**, weigh the cost of potential repairs against its value it may not be the best long-term daily driver unless you re okay with investing in upkeep.

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- You re comfortable with basic engine work and maintenance.

- You plan to modify or rebuild the engine (e.g., for a hot rod, swap, or performance build).

- You can source a **well-documented history** of the engine (e.g., no known timing chain issues, no head gasket leaks).

- You re okay with spending time on upkeep (oil changes, timing chain inspections, etc.).

- You find a **low-mileage example with a clean service history** (under 100,000 miles, with proof of timing chain replacements).

- You re prepared to **budget for potential transmission, electrical, or suspension repairs**.

- You don t mind **lower fuel economy and basic ride quality**.

- **Engine swap** into a lighter vehicle (e.g., a Mustang shell, Focus chassis, or even a hot rod frame).

- **Project car restoration** where you can control costs and build something unique.

- **Budget-friendly daily driver** if you re okay with trade-offs (e.g., not expecting luxury features or high resale value).

- You want a **low-maintenance, high-reliability daily vehicle** (consider a Toyota, Honda, or modern Ford with a known reliable engine).

- You re not comfortable with **basic mechanical work** (timing chain, head gasket, transmission).

- You expect **modern fuel efficiency or advanced safety features**.

**Final Verdict:** The **3.0L Duratec cylinder head is a great buy for the right project**, but the **entire vehicle is better suited for enthusiasts willing to put in work**. If you re buying it for a **swap or rebuild**, go for it if you re buying the car as-is, do thorough research and inspections first.

Details:

Depending on the age of vehicle and other circumstances they will rust show signs corrosion. Model: FORD 500. Most items are shipped the same-day as purchase. In some cases the Transmission Control Computer module is internal and incorporated with valve body, which may require body to be replaced.

Some external sensors or solenoids may need to be replaced. Block, Cylinder Heads, Timing Cover, Oil Pan, Flywheel. Buyer will need to replace the transmission oil filter, put a new pan gasket on, flush and add manufacturer specific fluids. Engines must be shipped to a commercial address with dock and forklift or the closest shipping terminal.

Search for more parts FORD 500. Quick shipping. Warranty period begins the day after delivery. Axle seals, front and drive shaft seals will also need to be replaced.

Free shipping, if offered, applies only to commercial addresses with proper equipment dock and forklift unload. Buyer pays return shipping if wrong color ordered. Transmission lines will need flushed, along with the transmission oil cooler needs replaced if equipped, this to be done so contaminants from bad not ruin your replacement. Picture in the listing may not be of actual item sold; it a stock picture only.

FORD 500 FIVE HUNDRED SEDAN 05-07 3.0L, RH rear. Transmissions must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Transfer cases will not be included with transmissions from 4x4 or All Wheel Drive vehicles.

part #: 5f9z6250aa prices

• $129.95-$265.00

specifications cylinderheapar:

• for models: 500, Freestyle
• for makes: Ford
• for years: 2005-2007
• mpn: 5f9z6250aa
• model: Ford-500
• type: Cylinder Head Assembly
• manufacturer warranty: 1 Month
• ipn: 306-01939
• id: 141b4a8c-d6b8-46a1-8c76-65eff37c1046
• interchange: 306-1939

offer cylinderheapar:

• started: April 24, 2026
• best offers: True
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0

seller cylinderheapar:

• rating: 99.6%
• city: Erie, Pennsylvania
• # reviews: 25859

payments cylinderheapar:

• other
• credit card: Diners-club
• wallet: Paypal

returns cylinderheapar:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

shipping cylinderheapar:

• type: Fixed
• transit: 4-10 Days
• carrier: USPS
• service: USPS Ground Advantage
• cost: $0.00
• class: Standard

general cylinderheapar:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

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