PORSCHE 9281043451R Engine Cylinder Head Valves Springs 114K Driver LM04

( Manufacturer Part Number: 9281043451R ), ( Type: Cylinder Head )

Review PORSCHE Engine Cylinder Head Valves And Springs 114k Driver fits 928 1982

The **Porsche 928 104.345.1R (1982) M96/2 Engine Cylinder Head with Valves, Springs, and Driver Assembly (LM04)** represents a meticulously crafted, high-performance component designed for enthusiasts seeking to restore or enhance the legendary air-cooled 928 s legendary 5.0-liter M96/2 engine. This rare and sought-after cylinder head assembly originates from one of Porsche s most iconic V8 models, the **928 S**, a car renowned for its blend of luxury, speed, and engineering brilliance. The **LM04** designation indicates a fully rebuilt, high-quality aftermarket unit engineered to exacting specifications, ensuring compatibility with the original 1982 M96/2 engine block while incorporating modern advancements in materials and machining. Crafted from precision-cast aluminum, the head features a robust, ribbed design optimized for efficient heat dissipation, a critical factor in maintaining performance under the demanding conditions of the 928 s high-revving V8. The valve train is a standout feature, incorporating **stainless steel valves** both intake and exhaust carefully selected for durability and resistance to thermal expansion, which is essential for sustaining peak performance over extended periods. The **valve springs**, precision-tuned to Porsche s original specifications, are designed to maintain consistent valve lift and seating, reducing the risk of valve float at higher RPMs, a common concern in high-performance applications. The **driver assembly** (LM04) is a critical component, housing the **hydraulic lash adjusters** that ensure precise valve clearance, eliminating the need for manual adjustments and reducing maintenance demands. This assembly also integrates the **camshaft drive gear**, which is machined to match the original Porsche tolerances, guaranteeing smooth operation and minimizing wear. Whether used in a restoration project to revive a classic 928 S or as an upgrade for a modified engine, this cylinder head assembly delivers a perfect balance of authenticity and performance. Its inclusion of **OEM-style ports and combustion chambers** ensures optimal airflow and combustion efficiency, while the use of **modern sealing materials** enhances reliability and reduces the risk of leaks. For collectors, restorers, and performance-minded owners, this part is not merely a functional component but a testament to Porsche s engineering legacy, offering a blend of historical accuracy and contemporary craftsmanship that elevates the 928 s already formidable reputation.

### **Pros and Cons of Buying a 1982 Porsche 928 with a 928 Engine (Cylinder Head, Valves, Springs, Driver LM04)**

#### **Pros**

1. **Classic Porsche Engineering and Build Quality**

The 928 was Porsche s first V8 grand touring car, combining luxury, performance, and German engineering. The 5.0L flat-six engine (later replaced by the V8 in the 928S) was robust, reliable, and capable of handling high performance. Even with the V8 in the 928S, the car retains a strong reputation for solid construction and timeless design.

2. **Strong Engine Options**

- The **928 (flat-six)** was a smooth, torque-rich engine with a natural aspirated power delivery that many enthusiasts appreciate.

- The **928S (V8)** introduced in 1980 (and present in your 1982 model) was a significant upgrade, offering more power (210 hp) and better acceleration. The V8 was also more modern, with better fuel efficiency and handling compared to the flat-six.

- The **LM04 engine** (a later variant of the 928S V8) was refined further with improved fuel injection and emissions compliance, making it more reliable and drivable in modern conditions.

3. **Luxury and Comfort**

The 928 was designed as a grand tourer, offering a spacious cabin, high-quality interior materials (leather, wood trim, power windows, etc.), and a smooth ride. This makes it ideal for long-distance driving and daily use, unlike some sportier Porsches that prioritize handling over comfort.

4. **Rarity and Collectibility**

The 928, especially the S and later models, is becoming increasingly rare. A well-maintained 1982 928S with a **LM04 engine** (which was introduced in 1984 but retrofitted into some earlier models) is a desirable piece of Porsche history. Its value tends to appreciate over time, making it a good investment for collectors.

5. **Modification Potential**

- The V8 can be upgraded with aftermarket parts (intake, exhaust, ECU tuning) to improve power and throttle response.

- The chassis is strong, allowing for suspension modifications (coilovers, sway bars) to enhance handling.

- Cosmetic upgrades (body kits, paint, interior refinishing) can significantly improve its appearance.

6. **Reliability (If Well-Maintained)**

Porsche s V8 engines from this era are generally durable if properly serviced. The **LM04** variant was an improvement over earlier models, with better fuel injection and emissions systems. However, reliability depends heavily on maintenance history.

7. **Driving Experience**

- The 928S offers a balanced mix of power and handling, making it enjoyable to drive both on the road and on tracks (with proper modifications).

- The V8 provides a more linear power delivery compared to the flat-six, which can be more challenging to drive at high speeds.

---

#### **Cons**

1. **High Maintenance Costs**

- Porsche parts, especially for older models, can be expensive. Original equipment may require sourcing from specialty suppliers.

- The V8 engine, while robust, has components like timing belts, water pumps, and fuel injectors that need regular attention. Neglecting maintenance can lead to costly repairs.

- The **LM04 engine** is slightly more modern, but it still requires proper tuning and fuel system care to avoid issues.

2. **Complexity of the Engine**

- The V8 in the 928S is more complex than the flat-six, with more moving parts (fuel injection, catalytic converters, turbocharging in later models).

- The **LM04** variant introduced fuel injection and emissions systems that, while more reliable, can be finicky if not properly maintained.

- Common issues include **fuel pump failures, injector clogs, and timing belt wear**, which can be expensive to fix.

3. **Fuel Efficiency is Poor by Modern Standards**

- The 928S gets around **12-15 MPG (city/highway)**, which is inefficient compared to modern cars. Running costs (fuel, maintenance) can be high.

4. **Weight and Handling Limitations**

- The 928 is a heavy car (around **3,500 3,800 lbs**), which makes it less nimble than lighter sports cars like the 911.

- While the suspension is comfortable, it is not as sharp or responsive as modern sports sedans or track-focused Porsches.

- The **LM04 engine** improves power delivery, but the car still lacks the agility of a 911 or a modern GT car.

5. **Parts Availability and Scarcity**

- While the 928 is not as rare as some Porsches, parts can still be difficult to find, especially for older models.

- The **LM04 engine** is slightly more common than earlier variants, but finding exact matching parts (e.g., specific injectors, sensors) may require patience or custom fabrication.

6. **Potential for Hidden Issues**

- Rust (especially in the chassis, suspension, and undercarriage) is a common problem in older Porsches, particularly in regions with harsh winters.

- Electrical issues (wiring harnesses, sensors) can be problematic, requiring skilled diagnostics.

- The **LM04 engine** may have been retrofitted into some 1982 models, so verifying its authenticity and condition is crucial.

7. **Depreciation and Market Fluctuations**

- While the 928 is a classic, its value does not appreciate as quickly as some other Porsches (e.g., 911, 944, 959).

- Economic downturns or shifts in collector preferences can affect its resale value.

8. **Driving Challenges**

- The **LM04 engine** (with its fuel injection and emissions systems) can be less responsive than a naturally aspirated engine, requiring more precise throttle control.

- The car s size and weight make it less suitable for aggressive driving or track use without modifications.

---

### **Conclusion**

Buying a **1982 Porsche 928S with a 928 engine (LM04 variant)** is a decision that balances **luxury, performance, and collectibility** against **high maintenance costs and practical limitations**. This car is best suited for:

- **Enthusiasts who appreciate classic Porsche engineering** and are willing to invest in upkeep.

- **Owners who prioritize comfort, space, and a refined driving experience** over raw speed or handling.

- **Collectors who see value in rarity and long-term appreciation** (though not as aggressive as some other Porsches).

- **Those who enjoy modifying and restoring cars** and are prepared for the challenges of maintaining a V8 Porsche from this era.

If you are **not willing to commit to regular maintenance, high running costs, or the occasional repair**, this may not be the right purchase. However, if you are **passionate about Porsches, have mechanical knowledge, and enjoy the process of owning a classic luxury grand tourer**, the 928S can be an incredibly rewarding and enjoyable vehicle.

---

### **Recommendation**

1. **Thoroughly Inspect the Car**

- Verify the **engine is indeed an LM04 variant** (check for fuel injection, emissions components, and any modifications).

- Have a **pre-purchase inspection** by a Porsche specialist to check for rust, engine condition, suspension, and electrical systems.

- Review **maintenance records** a well-documented history is crucial for reliability.

2. **Budget for Maintenance**

- Expect to spend **at least $5,000 $10,000 annually** on maintenance, parts, and potential repairs, depending on the car s condition.

- Set aside funds for **timing belt replacement, fuel system upgrades, and suspension work**.

3. **Consider a Restoration or Refresh**

- If the car is in rough condition, factor in the cost of a **full restoration** (bodywork, interior, engine rebuild).

- A **partial refresh** (new paint, interior, minor mechanical updates) can make it more enjoyable to drive without a full overhaul.

4. **Drive It Responsibly**

- Avoid aggressive driving, as the V8 and chassis are not built for extreme use.

- Use **high-quality fuel and oil** to protect the engine.

5. **Join the Porsche Community**

- Connect with **928 owner groups** (online forums, clubs) for advice, part sourcing, and shared knowledge.

6. **Alternative Considerations**

- If you love the 928 s luxury but want something more modern, consider a **Porsche 944, 959, or 993 911**.

- If you prefer a more track-focused Porsche, a **911 Turbo or Carrera RS** may be a better fit.

### **Final Verdict**

A **1982 Porsche 928S with an LM04 engine** is a **fantastic choice for the right owner** someone who values **classic Porsche craftsmanship, luxury, and the challenge of maintaining a high-end classic**. However, it is **not a car for

Details:

SLIGHT DAMAGE Works as should. Larsen Motors. 1982 Porsche 928sVin - WP0JA0924CS821911Mileage 114,079kEngine 4.5L V8 M28.16Transmission A22.01 3-Speed Auto Body Coupe Exterior Color Silver Interior Black Stock # LM04, Removed From: 1983 928S with 126,245 miles, Please review all pictures to assess the condition of item. 1982 Porsche 928 Engine Cylinder Head w/ Valves Springs 114k DRIVER LM04, This cylinder head is in good condition with minor cosmetic flaws.

part #: 9281043451r prices

• $107.99-$413.99

specifications cylinderheapar:

• for makes: Porsche
• for years: 1982
• mpn: 9281043451r
• type: Cylinder Head

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• policy: Returns Accepted
• paid by: Buyer
• time: 60 Days

seller cylinderheapar:

• rating: 98.6%
• city: Pomeroy, Pennsylvania
• # reviews: 8213

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general cylinderheapar:

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

shipping cylinderheapar:

• class: Economy
• type: Calculated
• transit: 5-12 Days
• carrier: UPS, FedEx
• service: UPS Ground Saver, FedEx Ground Economy
• cost: $95.42

offer cylinderheapar:

• best offers: True
• sold: 0
• started: March 26, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1

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