CHEVROLET SMITLEY-403-14-341 Cylinder Head 2.8L

( Manufacturer Part Number: SMITLEY-403-14-341 ), ( Part Type: Cylinder Head )

Review CHEVROLET Colorado Cylinder Head 2.8l fits 2006

The **Chevrolet Smiley 403-14-341 2006 Cylinder Head for the 2.8L Engine** is a meticulously engineered, high-performance component designed to maximize the efficiency and reliability of the 2.8L inline-four cylinder architecture found in select Chevrolet applications, including the iconic Pontiac Solstice, Saturn Sky, and other models within the GM Epsilon platform. Crafted from premium cast iron, this cylinder head is built to withstand the demands of modern driving conditions while delivering superior thermal management and combustion efficiency. The head features a robust **four-valve-per-cylinder design**, with precision-machined intake and exhaust ports optimized for optimal airflow, ensuring a balanced and responsive throttle response. The **pushrod-actuated valve train** incorporates durable rocker arms and hardened valve springs, reducing wear and minimizing the risk of valve float under high-performance conditions. The head is equipped with **separate intake and exhaust passages**, allowing for independent tuning of airflow characteristics to enhance both low-end torque and high-revving performance. Additionally, the **integrated spark plug wells** and **coolant passages** are strategically placed to promote even heat distribution, preventing hot spots that could compromise longevity. This cylinder head is fully compatible with the **2006 model year** and adheres to GM s original specifications, ensuring a seamless fit with the engine bay s existing components, including the valve cover, rocker arm covers, and intake manifold. Whether used in stock applications for improved reliability or in modified setups for enhanced performance, this cylinder head represents a critical upgrade for enthusiasts seeking to preserve the integrity of their engine while unlocking its full potential.

### **Pros and Cons of Buying a 2006 Chevrolet Smitley 403-14-341 (2.8L) Cylinder Head**

1. **Common and Widely Available** The 2.8L V6 engine (LZ1/LZ4) used in the Chevrolet Cobalt, HHR, and other GM vehicles is one of the most common small V6 engines from that era. This means parts, including cylinder heads, are relatively easy to find, both new and used.

2. **Repairable and Upgradable** The head design is straightforward, with common issues (like valve stem seals, intake manifold gaskets, or exhaust manifold leaks) that can be fixed with aftermarket parts or DIY labor. Performance upgrades (like headers, camshafts, or intake manifolds) are also well-supported.

3. **Lower Cost Compared to New** Since this is a used part, it will be significantly cheaper than an OEM replacement, making it a budget-friendly option for restoring or maintaining an older vehicle.

4. **Good for DIYers** The head is not overly complex, meaning someone with basic mechanical skills can work on it without needing specialized tools or expertise.

5. **Potential for Long-Term Reliability** If properly maintained, the LZ1/LZ4 engine can last well beyond 200,000 miles, especially with regular valve adjustments (if the engine requires them) and proper cooling system upkeep.

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- **Warped or cracked heads** (common in high-mileage engines due to overheating or poor maintenance).

- **Worn valve seats or guides** (leading to oil consumption or valve leaks).

- **Leaking head gaskets** (if the engine has a history of overheating).

- **Exhaust port erosion** (from carbon buildup or poor fuel quality).

2. **No Warranty or Return Policy** Purchasing a used part means no guarantee of quality or performance. You ll need to inspect it thoroughly (or have it inspected) before installation.

3. **Compatibility Concerns** While the 2.8L head is standard for many GM vehicles, ensure it matches your specific engine variant (LZ1 vs. LZ4) and that bolt patterns, studs, and gasket surfaces align properly.

4. **Risk of Hidden Problems** If the head was removed due to a failure (e.g., cracked casting, severe warping), it may not be salvageable or could fail again quickly.

5. **Labor Costs if Installation is Needed** Even if the head is in good condition, installing it may require professional labor (especially if the engine needs to be removed or the head needs machining).

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### **Conclusion and Recommendation**

Buying a used **2006 Chevrolet 2.8L cylinder head (403-14-341)** can be a cost-effective solution if you re restoring or maintaining an older GM vehicle, provided you take the following steps:

- **Inspect the Head Thoroughly** Look for cracks, warping, pitting, or signs of overheating. A machinist can check for warpage and assess valve seats/guides.

- **Check for Leaks** Ensure there are no cracks in the casting or signs of past head gasket failure (oil or coolant leaks).

- **Verify Engine Compatibility** Confirm it matches your engine s specifications (LZ1/LZ4) and that all bolt holes align.

- **Consider a Rebuilt Option** If available, a **rebuilt or remanufactured head** (from a reputable supplier) may offer better reliability than a used one.

- **Budget for Additional Costs** Factor in labor for installation, new gaskets, and potential machining if the head is out of spec.

If you re confident in your mechanical skills and can inspect the head properly, purchasing a used **403-14-341 head** can be a good deal especially if you find one from a trusted seller with a clean history. However, if you re unsure about its condition or lack the tools to assess it, consider a **rebuilt head** or a **new aftermarket alternative** (like a Ford 4.2L head, which is also common and sometimes more reliable).

For long-term reliability, prioritize **proper maintenance** (coolant changes, valve adjustments if needed, and avoiding overheating) to extend the life of the engine and cylinder head.

Details:

View other parts for this year make and model. Vehicle Year: 2006. Notes of the part or noticeable wear -, OILY. Vehicle Make: Chevrolet.

Some parts may be shipped in used/pre-owned boxes.

part #: smitley40314341 price

• $599.99

specifications cylinderheapar:

• for makes: Chevrolet
• for years: 2006
• mpn: Smitley-403-14-341
• part type: Cylinder Head

offer cylinderheapar:

• started: May 9, 2026
• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home

returns cylinderheapar:

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

shipping cylinderheapar:

• transit: 4-9 Days
• cost: $0.00
• service: Standard
• type: Fixed
• class: Standard

general cylinderheapar:

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

payments cylinderheapar:

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

seller cylinderheapar:

• city: Orrville, Ohio
• # reviews: 2104
• rating: 99.9%

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