BUICK 22511238 Cylinder Head 306-01250 8-307 5.0L 8TH

( Manufacturer Part Number: 22511238 ), ( Model: ELECTRA ), ( Part Type: Cylinder Head ), ( Conditions Options: Rwd, At, Lh ), ( Genuine Oem: Yes ), ( Ipn: 306-01250 ), ( Year: 1983 )

Review BUICK Cylinder Head 5.0l Vin 8th Digit fits ELECTRA CUTLASS 1981–1985

The **Buick 22511238 Cylinder Head (8-307 5.0L V8, 8th Generation, 1981 1985 Cutlass)** is a meticulously engineered component designed to deliver reliable performance and durability for the iconic **L30 5.0L V8** found in the **1981 through 1985 Buick Cutlass** models, including the **Skylark, Century, and Estate Wagon**. This cylinder head is a critical part of the engine s combustion system, featuring a **cast iron construction** with precision-machined surfaces to ensure optimal sealing, cooling, and heat dissipation. The head is equipped with **two-valve-per-cylinder architecture**, incorporating **intake and exhaust valves** that are strategically positioned to maximize airflow efficiency, contributing to smoother operation and improved throttle response. The **pushrod-operated valve train** is driven by a **single overhead camshaft** (via rocker arms), a design that balances simplicity with effectiveness, ensuring consistent valve lift and timing for peak engine performance.

One of the standout features of this cylinder head is its **integrated combustion chamber design**, which promotes efficient fuel-air mixture combustion while minimizing detonation risks. The **spark plug bores** are precisely aligned to accommodate standard **NGK or Champion plugs**, allowing for optimal ignition timing and power delivery. Additionally, the head includes **cast-in cooling passages** that work in tandem with the engine s cooling system to regulate temperature, preventing overheating and extending the lifespan of both the head and the entire powertrain. The **valve guides and seats** are engineered for durability, often requiring replacement only after extensive high-mileage use or performance modifications, making this part a long-lasting investment for restoration or replacement projects.

For enthusiasts and mechanics working on **1981 1985 Buick Cutlass engines**, this cylinder head is a **direct OEM replacement** that maintains the original factory specifications, ensuring a perfect fit with the **307 cubic inch (5.0L) L30 V8** block. Whether restoring a classic Cutlass to its former glory or upgrading a project car with a fresh set of components, this head provides the structural integrity and performance characteristics expected from Buick s legendary V8 engines. Its compatibility extends beyond the Cutlass, making it a versatile choice for other **1980s GM full-size vehicles** that share the same engine architecture, such as the **Oldsmobile Cutlass Supreme** or **Pontiac Grand Prix**. With its robust build and reliable operation, the **Buick 22511238 cylinder head** remains a cornerstone component for those seeking to preserve or enhance the performance of these timeless American muscle cars.

### **Pros and Cons of Buying a Buick 22511238 Cylinder Head (8-307 5.0L, 8th Gen, 1981-1985 Cutlass)**

1. **Common and Well-Documented** The 307-ci (5.0L) V8 engine from the 8th-generation Cutlass (1981-1985) is one of the most widely used and well-documented GM small-block V8s. Parts, manuals, and repair guides are readily available, making troubleshooting and maintenance easier.

2. **Proven Reliability (When Maintained)** With proper upkeep regular oil changes, valve adjustments, and cooling system maintenance this engine can last well over 200,000 miles. Many examples still run strong today, especially in performance applications.

3. **Performance Potential** The 307 is a strong, naturally aspirated engine that responds well to modifications. Swapping in a performance camshaft, headers, and a high-flow intake can significantly improve horsepower and torque. It s also a popular choice for street rods and muscle cars.

4. **Affordable Parts & Labor** Since this engine is no longer in production, parts are often cheaper than OEM components for newer vehicles. Labor costs for repairs are also reasonable compared to modern high-tech engines.

5. **Aftermarket Support** There is a strong aftermarket community for this engine, with options for performance parts, rebuild kits, and even full engine swaps (e.g., into a different chassis). Companies like Edelbrock, Holley, and Summit Racing offer compatible upgrades.

6. **Durability with Modifications** Unlike some older engines that struggle with modern fuels or high-performance builds, the 307 can handle forced induction (turbocharging or supercharging) with the right modifications, making it versatile for both street and track use.

7. **Classic Buick Appeal** If you re restoring or modifying a classic Cutlass, Skylark, or Regal, this engine fits perfectly with the era s aesthetic. Many enthusiasts appreciate the raw, muscle-car feel of a naturally aspirated V8.

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1. **Valvetrain Wear Over Time** The 307 uses hydraulic lifters (in later models) or mechanical lifters (in early models), which can wear out, leading to valve float or excessive oil consumption. Regular valve adjustments (every 3,000 5,000 miles for mechanical lifters) are required to prevent damage.

2. **Cooling System Vulnerabilities** The water pump, thermostat, and hoses are common failure points. A blown head gasket or overheating can occur if the cooling system isn t maintained. Some models had weak radiators or cooling fans that need upgrading.

3. **Fuel System Limitations** The stock carburetor (often a Rochester Quadrajet or Holley) can be finicky, especially with modern fuels. Upgrading to a fuel injection system (e.g., Edelbrock E-TEC) or a modern carburetor (like a Holley 4150) is often necessary for reliability and performance.

4. **Transmission Compatibility** While the 307 works well with most GM automatic transmissions (e.g., THM700-R4, 700R4, or 4L60), manual transmissions (like the Muncie M22 or TH350) require careful tuning to handle the engine s power without excessive wear.

5. **Emissions and Modern Compliance** If you plan to drive the vehicle on the road today, you may need to address emissions concerns. Some states require OBD-II compliance, which can be tricky with an older engine. A tuner or emissions system (like a PCM swap) may be necessary.

6. **Rust and Corrosion** Many 1980s Buicks suffer from rust, especially in the frame, suspension, and undercarriage. A thorough inspection of the chassis and body is critical before purchasing to avoid costly repairs.

7. **Limited Stock Availability** While parts exist, finding a complete, high-quality cylinder head (especially with the correct casting number, 22511238) can be challenging. Some heads may have been machined or modified, which could affect fitment or performance.

8. **Learning Curve for Repairs** If you re not familiar with small-block V8s, some repairs (e.g., head gasket replacement, valve job, or fuel system tuning) require specialized knowledge. Consulting with an experienced mechanic or joining a forum (like *Hot Rod Forum* or *Buick Central*) is advisable.

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### **Conclusion and Recommendation**

The **Buick 22511238 cylinder head (307-ci 5.0L V8, 1981-1985 Cutlass)** is a **great choice for enthusiasts** who prioritize performance, reliability, and modifiability. It strikes a balance between classic muscle-car appeal and modern aftermarket support. However, it requires **regular maintenance** especially attention to the valvetrain, cooling system, and fuel delivery to avoid common failure points.

#### **Who Should Buy It?**

- **Restoration enthusiasts** looking to build a classic Cutlass or Skylark.

- **Performance builders** who want a strong, naturally aspirated V8 with upgrade potential.

- **Budget-conscious buyers** who can find parts affordably and are willing to put in the work.

- **Those who enjoy mechanical projects** and aren t afraid of hands-on repairs.

#### **Who Should Avoid It?**

- **Casual drivers** who want a plug-and-play, low-maintenance engine.

- **Buyers in states with strict emissions laws** without a plan for compliance.

- **Those without access to mechanical knowledge or tools** for proper upkeep.

- **People who prioritize modern convenience** (e.g., OBD-II diagnostics, fuel injection reliability).

If you re **prepared for maintenance, enjoy working on engines, and want a powerful, modifiable V8**, the **307-ci Buick cylinder head is an excellent purchase**. Focus on:

- **Inspecting the head for cracks, warping, or valve seat wear** before buying.

- **Ensuring the engine has a clean bill of health** (no major rod knock, block cracks, or severe rust).

- **Upgrading critical components** (water pump, thermostat, fuel system, and valvetrain) early to prevent future issues.

For the right buyer, this engine is a **fantastic investment** one that can power a daily driver, a weekend project, or a high-performance street machine. Just be ready to **put in the work** to keep it running smoothly.

Details:

CUTLASS 81-84 8-307 5.0L. PARISIENNE 81 8-307 5.0L. CATALINA 81 8-307 5.0L. BONNEVILLE 81 8-307 5.0L.

part #: 22511238 prices

• $50.00-$69.00

specifications cylinderheapar:

• for models: Electra, Cutlass
• for makes: Buick
• for years: 1981-1985
• mpn: 22511238
• model: Electra
• part type: Cylinder Head
• conditions options: Rwd, At, Lh
• genuine oem: Yes
• ipn: 306-01250
• year: 1983

returns cylinderheapar:

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

payments cylinderheapar:

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

seller cylinderheapar:

• # reviews: 5324
• rating: 99.4%
• city: Litchfield, Minnesota

general cylinderheapar:

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

offer cylinderheapar:

• started: May 18, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

shipping cylinderheapar:

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