ACURA 306-50188 Cylinder Head 2.3L

( Part Type: Cylinder Head ), ( Conditions Options: 2.3, Note ), ( Genuine Oem: Yes ), ( Ipn: 306-50188 ), ( Year: 2009 )

Review ACURA Cylinder Head 2.3l fits RDX 2007–2012

The **Acura 306-50188 cylinder head** for the **2.3L VTEC engine** found in the **2007 2012 Acura RDX** is a precision-engineered component designed to deliver optimal performance, reliability, and efficiency in one of the most versatile and capable luxury SUVs of its era. This high-performance cylinder head is crafted from durable **cast aluminum**, featuring a **four-valve-per-cylinder design** with **intake and exhaust valves** that work in tandem with the engine s **Variable Valve Timing and Lift Electronic Control (VTEC)** system to maximize airflow, combustion efficiency, and power output. The **07-12 RDX model** benefits from this head s **integrated combustion chamber geometry**, which enhances thermal efficiency and reduces emissions while maintaining robust torque delivery critical for both city driving and highway cruising. The **intake ports** are precision-machined to ensure smooth, high-velocity airflow, while the **exhaust ports** are optimized for scavenging, helping to expel spent gases efficiently and further improving engine breathing. This cylinder head also incorporates **high-strength fasteners**, including **torque-to-yield bolts**, which ensure proper clamping force and prevent warping under high-performance conditions. Whether you're restoring a classic RDX, upgrading an engine for better reliability, or addressing wear from high-mileage use, this **OEM replacement part** guarantees a seamless fit and the same high-quality performance as the original, ensuring your vehicle maintains its signature blend of power, responsiveness, and refinement. Built to meet **Acura s stringent engineering standards**, this component is essential for preserving the integrity of your engine s breathing system, making it a must-have for any serious RDX enthusiast or mechanic.

Buying a used **Acura 3.0L V6 cylinder head (part number 506-50188) for a 2007 2012 RDX** can be a cost-effective way to restore performance or repair a failing engine, but it comes with several considerations. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying a Used Cylinder Head**

1. **Cost Savings**

The most significant advantage is the price. A new OEM cylinder head for this engine is expensive (often $1,200 $1,800 ), while a used one can be acquired for **$300 $800**, depending on condition and source. This makes it a practical choice for budget-conscious owners.

2. **Immediate Availability**

Used cylinder heads are often available faster than new ones, especially if you re working with a local salvage yard or online marketplaces. This reduces downtime for engine repairs.

3. **Potential for Performance Upgrades**

If the head is in good condition, it may allow for modifications like porting, larger valves, or even swapping in a high-performance head (e.g., from a Type S or NSX) for increased airflow and horsepower.

4. **Compatibility with Other Engines**

The 3.0L J30 engine (used in the RDX, MDX, and TL) shares many components across models, so a used head may fit other Acuras or Honda vehicles with minimal modifications.

5. **Testing and Inspection**

Since you re handling a used part, you can thoroughly inspect it for cracks, warping, or wear before purchasing, ensuring it meets your needs.

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### **Cons of Buying a Used Cylinder Head**

1. **Unknown Service History**

Without documentation, you can t be certain how the head was previously used. It may have been in an engine that suffered from **pre-ignition, detonation, or excessive heat**, leading to internal damage (e.g., cracked combustion chambers, warped decks, or worn valve seats). These issues can cause long-term problems.

2. **Potential for Hidden Damage**

Even if the head looks fine externally, internal flaws like **cracks in the exhaust ports, burnt valves, or warped surfaces** may not be visible until it s disassembled and inspected. This can lead to additional repair costs.

3. **Compatibility Issues**

While the part number suggests compatibility, slight variations in gasket surfaces, bolt patterns, or valve spring dimensions can occur. You may need to machine or replace gaskets to ensure a proper seal.

4. **Risk of Poor Machining or Reconditioning**

Some used heads may have been poorly reconditioned, with uneven deck surfaces, improper valve seat machining, or incorrect valve guide replacement. This can lead to leaks, poor sealing, or premature failure.

5. **Limited Warranty or No Return Policy**

Buying from private sellers or salvage yards typically means no warranty. If the head fails shortly after installation, you re responsible for the cost of replacement or further repairs.

6. **Potential for Contamination**

If the head was stored improperly or exposed to moisture, rust or corrosion could develop inside, requiring cleaning or replacement of internal components (e.g., valve springs, retainers).

7. **Labor Costs for Installation**

Even if the head is in good condition, installing it requires **removing the engine, cleaning surfaces, replacing gaskets, and reassembling with proper torque specs**. This adds to the overall cost and complexity of the repair.

---

### **Key Considerations Before Purchase**

1. **Inspect Thoroughly**

- Look for **cracks** (especially around the exhaust ports, oil passages, or water jackets) using a dye penetrant or magnifying glass.

- Check for **warping** by placing the head on a flat surface and measuring with a straightedge.

- Ensure **valve seats and guides** are intact and properly aligned.

- Verify that **bolt holes** are not stripped or enlarged.

2. **Source Reputably**

- **Salvage yards** (e.g., Car-X, Iron City) often have inspected parts but may not provide a history.

- **Online marketplaces** (eBay, Craigslist, Facebook Marketplace) can be hit-or-miss; prefer sellers with good reviews.

- **Performance shops** or **Acura specialists** may offer used heads with some level of inspection.

3. **Budget for Additional Costs**

- **Gaskets** (head gasket, valve cover gasket, oil pump gasket)

- **Torque wrench and proper bolts** (Acura uses high-strength bolts that must be replaced)

- **Labor** (if not doing it yourself)

- **Potential machining** (if surfaces need resurfacing)

4. **Alternative Options**

- **Remanufactured heads** (from companies like **Crane Cams, JE** or **Acura dealers**) offer a middle ground more expensive than used but with warranties.

- **New OEM heads** are the safest but most costly option.

- **Swapping with a donor engine** (e.g., from a wrecked RDX) can sometimes be cheaper if you can find a complete engine.

---

### **Conclusion**

Buying a used **Acura 3.0L V6 cylinder head (506-50188)** can be a **smart financial decision** if you re willing to take on the risk and perform due diligence. The savings are substantial, and with careful inspection, you can avoid major issues. However, the **lack of warranty, potential hidden damage, and installation complexity** make it a higher-risk option compared to remanufactured or new parts.

If you re **mechanically inclined, have access to inspection tools, and can afford additional costs**, a used head is worth considering especially if you find one from a trusted source. If you prefer **peace of mind and long-term reliability**, investing in a remanufactured or new head may be the better choice.

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### **Final Recommendation**

- Purchase from a **reputable salvage yard** or a **seller with a return policy**.

- **Inspect the head yourself** or have a trusted mechanic verify its condition.

- **Budget for extra costs** (gaskets, bolts, labor) to avoid surprises.

- **Consider remanufacturing** if the head is damaged but repairable.

- **Buy a remanufactured head** from a reputable supplier (e.g., **Crane Cams, JE, or an Acura dealer**).

- **Check for extended warranties** to protect your investment.

- **Swap with a donor engine** if you can find a complete unit at a reasonable price.

- **Consult an Acura specialist** to assess whether the head is worth the risk for your specific engine s condition.

- **Compare quotes** for remanufactured vs. used to see which fits your budget and goals.

Ultimately, the **best choice depends on your mechanical comfort level, budget, and how critical the head is to your engine s performance**. For most owners, a **remanufactured head with warranty** strikes the best balance between cost and reliability.

Details:

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. Exclusions from Limited Warranty. Normal wear and tear from the previous use is expected. All parts sold as is except expressly provided below.

The part has not been altered, modified, disassembled, overheated or damaged. Dispute Resolution. The part has not been installed. Limited Warranty Coverage.

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. Please remember you are purchasing OEM Original Equipment Manufacturer USED parts. No expedited shipping is available. The part is not a special order.

RDX 07-12 2.3L. Transmissions: Transmissions will come with the torque converter and all sensors. Steering Columns: All steering columns sold will come without airbags. Bumper assemblies DO NOT come with Upper Grilles unless stated.

Check the Q A section for Business Support. Sensors, valve covers, timing covers attached to core short/long blocks are not covered. Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period.

Brokered/non-stocked parts ordered specifically for your request. The part is not a custom body cut. Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Bolt-on items.

Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way.

part #: 306-50188 prices

• $375.00-$1200.00

specifications cylinderheapar:

• for models: Rdx
• for makes: Acura
• for years: 2007-2012
• part type: Cylinder Head
• conditions options: 2.3, Note
• genuine oem: Yes
• ipn: 306-50188
• year: 2009

payments cylinderheapar:

• other
• wallet: Paypal
• credit card: Discover

general cylinderheapar:

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

offer cylinderheapar:

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

returns cylinderheapar:

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

shipping cylinderheapar:

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

seller cylinderheapar:

• # reviews: 45632
• rating: 99.6%
• city: Annandale, Minnesota

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