PORSCHE 944.106.303.6R Cylinder Head

( Manufacturer Part Number: 944.106.303.6R ), ( Type: Cylinder Head ), ( Material: Aluminum ), ( Vintage Part: Yes ), ( Country Of Origin: Germany )

Review PORSCHE Very Nice Original Genuine Cylinder Head fits 6R 944 303 1985

The **Porsche 944 106.303.6R (1985) cylinder head** represents a meticulously engineered component from one of the most iconic and performance-driven front-engine, rear-wheel-drive coupes of the 1980s. This particular head is designed for the **944 S2 (951.303.6R)**, the second generation of Porsche s 944 lineup, which refined the original s mechanical foundation while introducing subtle yet meaningful upgrades to enhance both reliability and performance. Crafted from high-grade aluminum alloy, the head features a **dry-sump lubrication system** and is engineered to accommodate the **2.5-liter, 200-horsepower (SAE gross) M96/2 inline-four engine**, which was a significant evolution over the earlier 2.5L M62 unit. The **6R variant** denotes a rare, high-performance iteration, often associated with the **944 S2 Turbo** or later model-year updates that incorporated a revised camshaft profile, improved valve springs, and a slightly detuned turbocharger for better reliability though still delivering exhilarating power delivery. The head itself is equipped with **four valves per cylinder** (two intake and two exhaust), arranged in a **DOHC (Dual Overhead Camshaft) layout**, allowing for precise airflow management and efficient combustion. The intake ports are generously sized to maximize volumetric efficiency, while the exhaust ports are optimized for high-flow performance, ensuring that the engine breathes freely under both cruising and high-stress conditions. The **piston-to-valve clearance** is carefully calibrated to prevent interference, even at high RPM, making this head a robust choice for both street use and spirited driving. For restoration or performance applications, this cylinder head is a sought-after part, as it combines Porsche s signature precision engineering with the adaptability to accept aftermarket upgrades, such as high-flow headers, custom camshafts, or even a return to the original **M62 s more aggressive tuning** for those seeking a raw, high-revving experience. Whether installed in a classic 944 S2 or a modern restoration project, this head embodies the perfect blend of heritage and performance, ensuring that the engine behind it delivers the unmistakable growl and responsiveness that Porsche enthusiasts have come to love.

### **Pros and Cons of Buying a 1985 Porsche 944 (944.106.303.6R) with a Cylinder Head Issue**

#### **Pros**

1. **Classic Porsche Design and Prestige**

The 944 is a well-regarded Porsche model known for its timeless design, sporty handling, and strong brand appeal. Owning a Porsche, even a used one, carries prestige and is often seen as a status symbol.

2. **Good Performance for Its Class**

The 944 (especially the Turbo models like the 6R) delivers strong acceleration and a engaging driving experience. The 2.5L flat-six engine produces around 204 hp in the Turbo variant, making it quick for its era. The manual transmission (if available) enhances the driving experience.

3. **Reliability (Compared to Other Classics)**

While not as bulletproof as a modern car, the 944 is generally more reliable than earlier Porsche models (e.g., 911s from the 1970s) or some German rivals. The engine is robust, and with proper maintenance, it can last well over 100,000 miles.

4. **Aftermarket Support and Modifications**

The 944 has a strong aftermarket community, with readily available parts, upgrades (turbo kits, suspension modifications, exhaust systems), and tuning options. This makes it easier to customize and improve performance or comfort.

5. **Lower Cost of Ownership (Compared to Modern Porsches)**

Fuel, insurance, and maintenance costs are significantly lower than those of a new Porsche or even a modern used luxury car. Parts are often cheaper than those for newer models.

6. **Driving Enjoyment**

The 944 offers a balanced, rear-wheel-drive driving experience with precise handling. The Turbo variant (6R) provides a thrilling mix of power and agility, making it a fun car to drive on twisty roads.

7. **Potential for Restoration or Upgrades**

If the cylinder head issue is manageable (e.g., a cracked head that can be repaired or replaced), this could be an opportunity to restore the car to like-new condition. A well-maintained 944 can appreciate in value over time, especially if it s a rare or desirable variant.

---

#### **Cons**

1. **Cylinder Head Issues (Major Concern)**

The 1985 944 (especially the 6R Turbo variant) is known for cylinder head problems. The most common issue is **cracked cylinder heads**, often caused by overheating, poor cooling, or low-quality fuel. A cracked head can lead to:

- Loss of compression

- Coolant leaking into cylinders (resulting in white smoke, misfires, or catastrophic engine failure)

- Expensive repairs (replacement heads can cost $1,500 $3,000 or more, depending on availability and labor).

- If the head is severely damaged, the engine may need a full rebuild or replacement.

**Diagnosis:** Symptoms include overheating, coolant in the oil, white smoke from the exhaust, or check engine lights with misfire codes. A compression test or leak-down test is essential before purchasing.

2. **Turbocharger Reliability (For 6R Models)**

The Turbo variant (6R) has a turbocharger that can fail over time, leading to loss of power or turbo lag. Turbo replacements are costly, and the system requires regular maintenance (e.g., oil changes with the correct viscosity).

3. **Electrical and Computer Issues**

The 944 (especially later models) has electronic fuel injection (EFI) and a more complex ignition system than carbureted models. Electrical gremlins, sensor failures, or ECU issues can be frustrating to diagnose and repair. Common problems include:

- Faulty injectors

- Wiring harness failures

- ECU or sensor malfunctions

4. **Suspension and Steering Wear**

The 944 s suspension (shocks, bushings, ball joints) and steering components (rack and pinion, tie rods) wear out over time. These parts are relatively inexpensive but require regular attention to maintain handling.

5. **Fuel and Emissions Compliance**

- Use leaded fuel (if the car requires it, though many 944s can run on unleaded).

- Modify the exhaust or catalytic converter to pass emissions tests (in some regions).

- Accept that some states or countries may restrict classic car use on highways.

6. **Maintenance Costs**

- Cooling system (water pump, hoses, thermostat)

- Timing belt (critical must be replaced at the manufacturer s interval, typically every 60,000 80,000 miles).

- Spark plugs and ignition components.

- Fluid changes (transmission, differential, power steering).

- Ignoring maintenance can lead to expensive failures.

7. **Parts Availability and Lead Times**

While parts are generally available, some components (especially for the Turbo model) may have long lead times or require special ordering. Rare or discontinued parts can be difficult to source.

8. **Insurance Costs**

Insurance for a classic Porsche can be higher than for a modern used car, especially if the car is valued highly or has performance modifications.

9. **Driving Limitations**

- The 944 is not as comfortable as modern cars (harsh ride, limited sound insulation).

- Fuel economy is poor by today s standards (around 15 18 MPG for the Turbo).

- High-speed stability is not as refined as in modern sports cars.

10. **Depreciation Risk**

While some classic Porsches appreciate, the 944 is not a highly sought-after investment piece like a 911 or 917. Its value may not grow significantly, and it could depreciate if not well-maintained.

---

### **Ending Conclusion**

Buying a **1985 Porsche 944 (6R Turbo) with cylinder head issues** is a **high-risk, high-reward** decision. The car offers **excellent driving dynamics, Porsche prestige, and aftermarket support**, but the **cylinder head problem is a major red flag** that could turn into a costly nightmare if not properly addressed.

- Pay for a **new or rebuilt head** (likely $1,500 $3,000 ).

- Have **mechanical expertise** to diagnose and repair the issue.

- Accept that the car may have **hidden problems** (e.g., overheating, coolant leaks, engine damage).

- The car could be a **fantastic project or daily driver**, especially if you enjoy working on cars and are willing to invest in maintenance.

- The **Turbo variant (6R) is more desirable** than the naturally aspirated models, but its turbocharger and electrical systems require extra attention.

- Immediate repairs (if any issues are found).

- Regular maintenance (timing belt, cooling system, suspension).

- Potential future upgrades (exhaust, suspension, interior).

- **Get a professional inspection** (preferably by a Porsche specialist) before purchasing. A **compression test, leak-down test, and cylinder head inspection** are essential.

- **Negotiate the price** based on the severity of the cylinder head issue. If the head is cracked, demand a significant discount or walk away.

- A **944 S2 (1988 1991)** with a known good engine.

- A **944 Turbo (1986 1989)** with a history of proper maintenance.

- A **911 (930 Turbo or 964)** if you want a more prestigious or reliable classic.

- **Replace the cylinder head immediately** if it s compromised.

- **Budget for a full service** (oil change, filters, fluids, tires, brakes).

- **Join a 944 owner s club** (e.g., 944 Owners Club (https://www.944ownersclub.com/)) for support and part sourcing.

- **Drive it responsibly** avoid aggressive driving that could stress the engine or cooling system.

- Enjoys working on cars or has access to mechanics.

- Is prepared for **unexpected repairs**.

- Values **driving fun and Porsche heritage** over perfection.

If the cylinder head is **not a dealbreaker**, it can be a **great purchase**. If it is, **walk away** there are plenty of other classic Porsches (or even modern used ones) that offer better reliability for the price.

Details:

Please carefully review all photos for exact condition. Casting number: R. No visible cracks or major damage observed. Casting number appears to be 944.106.303.6R.

Details: Genuine OEM Porsche part. Great candidate for a rebuild, restoration, performance build, or replacement cylinder head. Used OEM condition. This is a bare head.

Combustion chambers, ports, and machined surfaces appear clean overall. Aluminum construction. Overall very clean used condition with normal cosmetic wear from age and use. Fits 1985 Porsche 944 2.5L 8V engines.

Valves and springs removed/not included. Head only as shown in photos. Valves and springs were tested have been removed are NOT included. OEM cylinder head removed from a 1985 Porsche 944 2.5L naturally aspirated 8 valve engine.

Bare cylinder head only.

part #: 9441063036r price

• $399.99

specifications cylinderheapar:

• for models: 6r, 944, 303
• for makes: Porsche
• for years: 1985
• mpn: 944.106.303.6r
• type: Cylinder Head
• material: Aluminum
• vintage part: Yes
• country of origin: Germany

offer cylinderheapar:

• availability: In Stock
• best offers: True
• options: Ship-to-home
• started: May 21, 2026
• quantity: 1
• sold: 0

seller cylinderheapar:

• # reviews: 395
• city: Glendale, Arizona
• rating: 98.5%

general cylinderheapar:

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

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• type: Fixed
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