PORSCHE D581677 Crankshaft Connecting Rods 2.7

( Manufacturer Part Number: D581677 ), ( Part Type: Crankshaft Rod ), ( Material: Steel ), ( Vintage Part: Yes ), ( Country Of Origin: Germany ), ( Performance Part: No )

Review PORSCHE 2.7 Oe Crankshaft Connecting Rods51677 fits 911

The **Porsche 911 993 (996) 2.7L Flat-Six Engine Crankshaft and Connecting Rods (Part Numbers: D581677)** represents a critical component set within the legendary 911 s high-performance, naturally aspirated powerplant, meticulously engineered to deliver the iconic blend of precision, reliability, and exhilarating performance that Porsche enthusiasts demand. These forged steel crankshaft and connecting rods are integral to the 2.7-liter M96 engine, a refined evolution of the 993 s 3.6-liter flat-six, optimized for efficiency and torque while maintaining the signature sound and driving dynamics that define the 911. The crankshaft, forged from high-grade alloy steel, features a robust design with precision-machined counterweights and main journals, ensuring minimal vibration and optimal power transfer across the six cylinders. Its balanced construction is essential for maintaining the engine s smooth operation under high loads, whether cruising at highway speeds or unleashing the 2.7L s 250 horsepower and 229 lb-ft of torque in spirited driving conditions.

Complementing the crankshaft are the **connecting rods**, forged from a similarly high-strength alloy to withstand the immense forces generated during combustion. These rods are engineered with a slender yet robust profile, allowing for efficient piston travel while minimizing mass and inertia, which is crucial for maintaining high RPM responsiveness a hallmark of the 911 s driving character. The rods are paired with the engine s forged pistons and precision-ground bearings to form a rigid, high-stress assembly that ensures durability and performance consistency, even under aggressive driving scenarios. The design of these components reflects Porsche s commitment to engineering excellence, where every detail from the crankshaft s polished journals to the connecting rods precise fit contributes to the engine s longevity and the 911 s legendary reliability.

For restoration or high-performance applications, these **OEM Porsche D581677 crankshaft and connecting rods** are an ideal choice, offering the same quality and specifications as those installed in production models. Whether replacing worn components in a classic 996 911 or upgrading a modified engine for increased durability, these parts ensure that the engine retains its original performance characteristics while benefiting from modern maintenance standards. The attention to detail in their construction including heat treatment, machining tolerances, and surface finishes guarantees that they will perform as reliably as the day they were installed in a factory-built 911, making them a sought-after solution for both purists and performance-minded owners alike.

### **Pros and Cons of Buying a Porsche 911 (993) 2.7L Engine with Damaged Crankshaft Connecting Rods (Part Number D581677)**

#### **Pros**

1. **Classic Porsche 911 Heritage** The 993 2.7L engine is one of the most iconic and desirable powerplants in Porsche history, known for its smooth operation, timeless design, and strong aftermarket support. Owning a 911 with this engine provides a piece of automotive history.

2. **Potential for Restoration** If the rods are the only major issue, a skilled mechanic could rebuild the engine with new rods, restoring it to full functionality. This can be a rewarding project for enthusiasts who enjoy hands-on work.

3. **Aftermarket and Performance Potential** The 2.7L engine has a thriving aftermarket, with options for turbocharging, forced induction, and high-performance upgrades. A rebuilt engine could be tuned for significant power gains.

4. **Lower Cost Than a New 911** Compared to buying a new or even a modern used 911, a 993 with engine issues can be acquired at a fraction of the cost, making it an attractive option for collectors or restorers on a budget.

5. **Driving Experience** The 993 s 2.7L engine delivers a classic Porsche sound, smooth power delivery, and a driving experience that is unmatched by modern turbocharged engines. For purists, this is a major selling point.

---

#### **Cons**

1. **High Repair Costs** Replacing crankshaft connecting rods is a labor-intensive and expensive job. The cost of labor, new rods, and potential additional repairs (such as balancing, machining, or replacing other components) can easily exceed **$3,000 $6,000 **, depending on the shop and location.

2. **Engine Rebuild Complexity** Even if only the rods are broken, the engine may require a full teardown for inspection. This increases the risk of discovering other hidden issues (e.g., worn bearings, cracked blocks, or timing chain problems), which could further delay and increase costs.

3. **Reliability Concerns** The 2.7L engine is robust, but it is not bulletproof. If the rods failed due to neglect (e.g., lack of maintenance, oil starvation, or improper lubrication), the underlying cause must be addressed to prevent future failures. This could involve upgrading the oil pump, cooling system, or even switching to a more modern engine.

4. **Depreciation Risk** A 993 with a major engine issue is unlikely to hold its value well. Even after repair, potential buyers may be wary of the engine s history, making resale difficult.

5. **Time and Effort Required** Rebuilding an engine is a significant time commitment, especially for someone without mechanical experience. If you re not prepared to dedicate months to the project, the stress and frustration may outweigh the reward.

6. **Alternative Options Exist** Instead of repairing a 993 with a failed engine, you could purchase a **996, 997, or 991 911 with a known-good engine** for a similar price, avoiding the risk and hassle of a rebuild. Many modern 911s are more reliable and easier to maintain.

7. **Insurance and Registration Challenges** Some insurers may charge higher premiums for a 911 with a rebuilt engine, and registration offices may require proof of a full inspection or rebuild, adding bureaucratic hurdles.

---

### **Ending Conclusion**

Buying a **Porsche 911 993 with damaged connecting rods (D581677)** can be a fantastic opportunity if you are a **restoration enthusiast, a mechanic with experience rebuilding engines, or someone who prioritizes the classic driving experience over modern convenience**. The 2.7L engine is a legendary powerplant, and with proper care, it can be restored to peak condition.

However, the **high cost of repair, potential hidden issues, and time commitment** make this a risky proposition for casual buyers or those without mechanical expertise. If you lack the skills or resources to handle the rebuild, the financial and emotional investment may not be justified.

For most buyers, **purchasing a 911 with a known-good engine (even if slightly older) or considering a modern 911 with better reliability** would be a more practical and less stressful choice.

---

### **Recommendation**

- **If you are a restorer or mechanic with experience:** Proceed with caution, get multiple quotes from reputable shops, and ensure the engine block and other components are in good condition. Budget for **at least $5,000 $8,000** for a full rebuild.

- **If you are not experienced with engine work:** Avoid this project unless you are prepared to pay a premium for a **fully rebuilt or used 993 with a known-good engine** from a trusted seller.

- **If you want a reliable daily driver:** Consider a **996, 997, or 991 911** with a **3.4L, 3.6L, or 3.8L engine**, which are more modern, easier to maintain, and less prone to catastrophic failures.

- **If you love the 993 but want to minimize risk:** Look for a **993 with a previously rebuilt engine** (preferably with a **Porsche AG or reputable specialist** rebuild) and a **full service history**.

Ultimately, the decision depends on your **budget, skills, patience, and whether you value the project over the finished product**. If the 911 is a passion project, the reward of driving a restored classic may outweigh the challenges. If it s a practical purchase, the risks may not be worth it.

Details:

Porsche 911 2.7 OE Crankshaft With Connecting Rods,51677, matching Flay wheel and clutch, free shipping 48 state clutch.

part #: d581677 price

• $1200.00

specifications cranshafengin:

• for models: 911
• for makes: Porsche
• mpn: D581677
• part type: Crankshaft Rod
• material: Steel
• vintage part: Yes
• country of origin: Germany
• performance part: No

general cranshafengin:

• condition: For parts or not working
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

offer cranshafengin:

• best offers: True
• quantity: 1
• started: April 9, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

shipping cranshafengin:

• class: Standard
• transit: 5-11 Days
• carrier: UPS
• type: Fixed
• service: UPS Ground
• cost: $0.00

payments cranshafengin:

• cash
• other
• credit card: Mastercard
• wallet: Google-pay

seller cranshafengin:

• city: Culver City, California
• rating: 100.0%
• # reviews: 810

returns cranshafengin:

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

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