HONDA 306-59255AL Driver Left Cylinder Head Front 3.0L

( Part Type: Driver Cylinder Head ), ( Conditions Options: Lh, 3.0 ), ( Genuine Oem: Yes ), ( Ipn: 306-59255al ), ( Placement: Driver/left ), ( Year: 2004 )

Review HONDA Driver Left Cylinder Head 3.0l Front fits ACCORD 2003–2007

The **Honda 306-59255AL Driver Side Cylinder Head for the 3.0L V6 Engine (2003 2007 Accord)** is a precision-engineered, high-performance component designed to deliver optimal combustion efficiency and durability for Honda s iconic 3.0L V6 powertrain. Crafted from high-grade cast iron, this cylinder head is meticulously machined to exacting specifications, ensuring proper sealing, cooling, and valve operation for seamless engine performance. The head features a robust **four-valve-per-cylinder design**, allowing for improved airflow and enhanced combustion, which translates to better throttle response, fuel economy, and overall power output. The **driver-side head** includes critical components such as the **intake and exhaust valves**, **valve springs**, **rockers**, and **guide bushings**, all of which are engineered to withstand the high temperatures and pressures generated during operation. The **integrated spark plug boss** ensures proper ignition alignment, while the **coolant passages** are strategically placed to maintain optimal thermal management, preventing overheating and prolonging engine life. This part is fully compatible with the **2003 2007 Honda Accord (JDM and USDM models)** equipped with the **3.0L V6 (Type R or standard)**, making it an essential replacement for engines experiencing leaks, warping, or wear. Whether addressing a **gasket failure**, **valve stem seal deterioration**, or **coolant leakage**, this cylinder head is built to restore peak performance and reliability, ensuring your Accord runs with the same precision and power it was originally designed for. For optimal installation, it is recommended to use **high-quality gaskets, proper torque specifications**, and a **clean, debris-free surface** to prevent future issues. This genuine Honda part is a direct fit, offering the same quality and engineering standards as the original equipment, making it the ideal choice for both professional mechanics and dedicated DIY enthusiasts seeking long-term engine health.

### **Pros and Cons of Buying a Honda 3.0L (306-59255AL) Cylinder Head for a 2003-2007 Accord (Driver s Side)**

1. **Reliability and Durability** Honda s 3.0L V6 engine is known for its robust construction, making it a dependable choice for daily driving and long-term use. The cylinder head is designed to handle high-performance applications if modified properly.

2. **Performance Potential** The 3.0L engine is a popular platform for tuning, with aftermarket support for forced induction (turbo/supercharger), porting, and upgrading components. A fresh cylinder head can significantly improve airflow and power output.

3. **Compatibility with Aftermarket Parts** The 306-59255AL head is a common OEM part, meaning there are numerous aftermarket alternatives (e.g., forged heads, ported heads, or high-flow versions) available for further upgrades.

4. **Ease of Installation** Honda s 3.0L engine is relatively straightforward to work on, especially for those with mechanical experience. The cylinder head gasket and bolts are standard, and Honda provides service manuals for reference.

5. **Resale Value** A well-maintained 3.0L engine with a new cylinder head can retain value, especially if the vehicle is part of a performance build or a classic Accord project.

6. **Fuel Efficiency (Stock or Mildly Tuned)** While not as efficient as smaller engines, the 3.0L V6 offers a good balance of power and fuel economy, especially when paired with a manual transmission or a tuned ECU.

7. **Availability of Parts** Due to the engine s popularity, finding replacement parts (bolts, gaskets, valves, etc.) is easier than for less common engines.

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1. **Cost of Replacement** A genuine OEM cylinder head (306-59255AL) can be expensive, especially if sourced from a reputable dealer or salvage yard. Aftermarket alternatives may offer better value but could compromise quality if not properly tested.

2. **Potential for Leaks** The 3.0L engine is prone to oil leaks around the valve cover gasket and oil filter housing gasket. A new cylinder head alone won t fix these issues, requiring additional attention to sealing components.

3. **Head Gasket Failures** While not directly related to the cylinder head itself, the 3.0L engine has a history of head gasket failures, particularly under high-performance conditions or with improper maintenance. Always inspect the block and head mating surfaces when installing a new head.

4. **Thermal Management Challenges** The 3.0L V6 can run hot, especially under heavy loads. Poor cooling or inadequate oil flow can lead to premature wear or failure of the cylinder head and other components.

5. **Complexity of Tuning** While the engine responds well to modifications, improper tuning (e.g., too much boost without supporting upgrades) can cause detonation, valve float, or catastrophic failure. Requires careful calibration.

6. **Weight and Size** The 3.0L V6 is heavier than smaller engines, which can affect handling and fuel economy in a front-wheel-drive Accord. This may be a consideration if weight reduction is a priority.

7. **Depreciation Risk** If the vehicle is not maintained or modified properly, the 3.0L engine (and its components) may depreciate in value over time, especially if parts wear out prematurely.

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The **Honda 306-59255AL cylinder head (3.0L, 2003-2007 Accord)** is a solid choice for those looking to restore power, reliability, or performance to their vehicle. It offers **high durability, tuning potential, and compatibility with aftermarket upgrades**, making it ideal for enthusiasts or those planning to build a performance Accord. However, **cost, potential leak issues, and the need for proper maintenance** must be carefully considered.

If you are **mechanically inclined, willing to invest in supporting components (gaskets, bolts, cooling system), and plan to use the engine responsibly**, this cylinder head is a worthwhile purchase. For **casual drivers or those on a tight budget**, weigh the cost against the benefits, as aftermarket alternatives or rebuilding the existing head may be more economical.

- You prioritize longevity and reliability.

- You plan to heavily modify the engine (turbo/supercharger, porting, etc.).

- You want a genuine Honda component with full warranty support.

- You are on a budget and can verify the quality of the aftermarket head (e.g., from reputable brands like **JE, Scat, or Forged Racing**).

- You plan to keep the engine stock or with mild modifications.

- A **high-quality head gasket** (e.g., Fel-Pro or Sealed Power).

- **New cylinder head bolts** (Honda s bolts are single-use; never reuse them).

- A **proper break-in procedure** to prevent warping or leaks.

- **Supporting upgrades** (cooling system, oil pump, timing chain if needed).

- The rest of the engine (block, crank, camshaft) shows signs of severe wear or damage.

- You lack the mechanical skills or tools to install it correctly.

- You intend to use the engine in extreme conditions (e.g., high boost without proper cooling).

**Final Verdict:** For the right buyer, this cylinder head is a **strong upgrade** that can extend the life of a 3.0L Accord engine or unlock significant power gains. However, it requires **proper installation, maintenance, and tuning** to avoid costly mistakes.

Details:

Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Bolt-on items Convenience Items: Items attached to or included with the part, such as wiring, bulbs, sockets, sensors, coils, distributor caps, spark plugs, water pumps, filters, brake parts, backing plates, hoses, vacuum lines, u-joints, timing belts/components, similar items, are considered convenience items and not covered by this limited warranty. The part is not a custom body cut.

Please remember you are purchasing OEM Original Equipment Manufacturer USED parts. Steering Columns: All steering columns sold will come without airbags. Dispute Resolution.

The part is not a special order. No expedited shipping is available. Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period.

The part has not been installed. Front, WARRANTY / GUARANTEE. Brokered/non-stocked parts ordered specifically for your request. Bumper assemblies DO NOT come with Upper Grilles unless stated.

The part has not been altered, modified, disassembled, overheated or damaged. Normal wear and tear from the previous use is expected. Exclusions from Limited Warranty. Labor and Related Costs: This limited warranty does not cover labor, diagnostics, towing, rental car costs, or any other expenses related to the installation, testing, removal, replacement of a part.

Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way. Sensors, valve covers, timing covers attached to core short/long blocks are not covered. All parts sold as is except expressly provided below. Check the Q A section for Business Support.

Limited Warranty Coverage. Transmissions: Transmissions will come with the torque converter and all sensors.

part #: 306-59255al prices

• $65.00-$238.63

specifications cylinderheapar:

• for models: Accord
• for makes: Honda
• for years: 2003-2007
• part type: Driver Cylinder Head
• conditions options: Lh, 3.0
• genuine oem: Yes
• ipn: 306-59255al
• placement: Driver/left
• year: 2004

general cylinderheapar:

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

shipping cylinderheapar:

• type: Fixed
• transit: 2-4 Days
• class: Standard
• service: Standard
• cost: $65.00

returns cylinderheapar:

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

seller cylinderheapar:

• # reviews: 45659
• city: Annandale, Minnesota
• rating: 99.6%

payments cylinderheapar:

• wallet: Google-pay
• credit card: Mastercard
• other

offer cylinderheapar:

• started: April 13, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0

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