HONDA 7705478 Front Cylinder Head 3.5L

( Manufacturer Part Number: 7705478 ), ( Part Type: Cylinder Head ), ( Id: Faef819f-8cf1-42a1-8a74-8104d9f8404d ), ( Interchange: 306-59372a ), ( Year: 2006 )

Review HONDA Front Cylinder Head Assembly Oem 3.5l fits ODYSSEY 2005–2007

The **Honda 7705478 Front Cylinder Head (3.5L V6) for the 2005 2007 Odyssey** is a meticulously engineered, high-performance component designed to deliver reliable power and longevity for Honda s iconic minivan. Crafted from premium cast iron, this front cylinder head is built to withstand the demanding thermal and mechanical stresses of the J35A8 engine, ensuring optimal combustion efficiency and cooling performance. The head features a robust design with precision-machined combustion chambers and intake ports, engineered to maximize airflow and fuel mixture for smoother operation and improved throttle response. Critical components such as the valve seats, guides, and spring retainers are integrated into the head, providing structural integrity and alignment for the pushrod-operated overhead valve (OHV) system. The head also includes the spark plug bosses, which are strategically positioned to ensure even ignition distribution across the cylinders, contributing to a balanced and efficient combustion process. This part is a direct-fit replacement, meticulously manufactured to meet Honda s exacting standards, ensuring compatibility with the original engine bay layout, wiring harnesses, and supporting components. Whether replacing a worn or damaged head due to overheating, coolant leaks, or general wear, this cylinder head is a dependable choice for restoring the performance and reliability of your 2005 2007 Odyssey s 3.5L V6 engine. Its durable construction and precise engineering make it an essential upgrade for enthusiasts and mechanics seeking to maintain peak engine health and longevity.

### **Pros and Cons of Buying a 2005-2007 Honda Odyssey 3.5L Front Cylinder Head (Part #7705478)**

1. **Reliability and Durability** Honda s 3.5L V6 engine (J35A) is known for its longevity when properly maintained. The cylinder head is a critical component, and a genuine Honda part ensures compatibility and performance consistency.

2. **Warranty Coverage** If purchased from an authorized Honda dealer or a reputable online retailer, this part may come with a limited warranty (typically 12 months or 12,000 miles), providing peace of mind against defects.

3. **Easy Installation** The cylinder head is a standard replacement part for this engine, and many mechanics find it straightforward to install, especially with the right tools (torque wrench, gasket scraper, and sealant).

4. **Compatibility** This part fits all 2005 2007 Honda Odyssey models with the 3.5L V6 engine, making it a universal solution for head replacements, valve cover replacements, or engine rebuilds.

5. **Aftermarket Support** While not always necessary, aftermarket cylinder heads (from brands like **Fel-Pro, ACDelco, or Moroso**) can sometimes be cheaper, but Honda s OEM part is preferred for original fit and finish.

6. **Prevents Long-Term Engine Damage** A failing cylinder head can lead to catastrophic engine failure (e.g., blown head gaskets, coolant leaks, or compression loss). Replacing it early avoids costly repairs.

7. **Resale Value** Keeping the engine in good condition with OEM parts helps maintain the Odyssey s resale value, especially if it s being sold as a project or used vehicle.

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1. **High Upfront Cost** The **Honda 7705478 cylinder head** is not cheap, typically ranging between **$300 $500** depending on the source (dealer vs. online). This can be a significant expense if replacing multiple components (e.g., gaskets, bolts, or valves).

2. **Labor-Intensive Replacement** Removing and reinstalling the cylinder head requires **removing the engine from the vehicle** (in most cases) or at least significant disassembly (intake manifold, exhaust headers, fuel lines, etc.). This adds **$500 $1,200 in labor costs** depending on the shop.

3. **Potential for Additional Damage** If the engine has been neglected, removing the head may reveal **warped heads, cracked blocks, or worn valves**, requiring further repairs (e.g., resurfacing, valve replacement, or even a full rebuild).

4. **Limited Availability** While not rare, finding a **new OEM Honda cylinder head** can be difficult, especially if buying used or from a non-authorized seller. Counterfeit or salvaged parts may not fit properly.

5. **Specialized Tools Required** Proper installation demands **precision tools** (torque wrench, head gasket scraper, sealant, and possibly a head alignment tool). Improper installation can lead to **leaks, compression loss, or even engine failure**.

6. **Time-Consuming Process** A full cylinder head replacement (including gaskets, bolts, and valve adjustment) can take **10 20 hours of labor**, depending on the mechanic s experience.

7. **Risk of Buying a Salvaged Part** If purchasing from a junkyard or untrusted seller, there s a chance the part was **mishandled or damaged**, reducing its lifespan.

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### **Conclusion & Recommendation**

The **2005 2007 Honda Odyssey 3.5L cylinder head (7705478)** is a **critical but expensive** replacement part that, when done correctly, **extends engine life and prevents major failures**. The decision to buy it depends on your **budget, mechanical skill level, and engine condition**.

- **Visible coolant leaks** (white smoke from exhaust, overheating).

- **Blown head gaskets** (oil in coolant, coolant in oil, compression loss).

- **Warped or cracked cylinder heads** (confirmed via inspection).

- **A planned engine rebuild** (replacing the head is standard procedure).

**If you re working with a reputable mechanic** who can ensure proper installation.

**If you have the budget** for both the part and labor (expect **$800 $2,000 ** total for a full replacement).

**If the engine is severely damaged** (e.g., cracked block, seized valves) and a **full rebuild or replacement** is more cost-effective.

**If you lack mechanical experience** this is an advanced repair best left to professionals.

**If you find a cheaper alternative** (e.g., **aftermarket heads from Moroso or Fel-Pro**, though quality varies).

**If the vehicle has high mileage (200K )** and the cost of repair exceeds the car s value consider **trading it in or selling it as-is**.

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- **If the engine is sound but the head is failing**, **proceed with the replacement** it s a **necessary repair** to avoid engine destruction.

- **Get multiple quotes** from mechanics to ensure fair pricing.

- **Inspect the engine thoroughly** before committing sometimes a **partial rebuild (just head gaskets, bolts, and valves)** is sufficient.

- **Avoid buying used/salvaged parts** unless you re certain of their condition.

- **If unsure**, consult a **Honda specialist** some shops offer **diagnostic services** to confirm if the head is the root issue.

**Bottom Line:** This is a **legitimate repair** for a failing engine, but it s **not a cheap or easy fix**. Weigh the cost against the vehicle s value and your long-term goals before proceeding.

Details:

HONDA ODYSSEY 05-07 3.5L, Touring, LH front. This part will fit the following: HONDA ODYSSEY 05-07 3.5L, EX-L leather, LH front. Search for more parts HONDA ODYSSEY.

part #: 7705478 price

• $391.88

specifications cylinderheapar:

• for models: Odyssey
• for makes: Honda
• for years: 2005-2007
• mpn: 7705478
• part type: Cylinder Head
• id: Faef819f-8cf1-42a1-8a74-8104d9f8404d
• interchange: 306-59372a
• year: 2006

offer cylinderheapar:

• quantity: 1
• best offers: True
• options: Ship-to-home
• availability: In Stock
• started: February 11, 2026
• sold: 0

payments cylinderheapar:

• wallet: Paypal
• other
• credit card: Visa

returns cylinderheapar:

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

shipping cylinderheapar:

• cost: $0.00
• service: Standard
• transit: 2-7 Days
• type: Fixed
• class: Standard

general cylinderheapar:

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

seller cylinderheapar:

• rating: 99.3%
• # reviews: 14264
• city: Brush, Colorado

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