CHEVROLET 303.GM1Z09 Crankshaft

( Model: CORVETTE ), ( Part Type: Crankshaft ), ( Conditions Options: Ls7 Crankshaft. Freshly Machined Sk ), ( Genuine Oem: Yes ), ( Ipn: 303.gm1z09 ), ( Manufacturer Warranty: 90 Day )

Review CHEVROLET Crankshaft fits CORVETTE 303 2009

The **2009 Chevrolet Corvette (GM1Z09) LS3 V8 Crankshaft** is a precision-engineered component at the heart of one of the most iconic American muscle cars ever produced, embodying the perfect blend of raw power, cutting-edge engineering, and timeless Corvette heritage. Forged from high-grade **AISI 4340 alloy steel**, this crankshaft is designed to withstand the immense stresses of the legendary **7,025 cc (428 cubic inches) LS3 V8 engine**, which produces a staggering **430 horsepower and 420 lb-ft of torque** in its stock form. The LS3 s architecture featuring a **cast iron block with aluminum cylinder heads, forged pistons, and a forged steel connecting rod package** relies on this crankshaft to deliver unparalleled durability and performance, making it a critical part for both stock and high-performance applications.

Measuring approximately **12.5 inches in length** and featuring a **main journal diameter of 2.375 inches** with a **rod journal diameter of 2.200 inches**, this crankshaft is machined to exacting tolerances to ensure smooth operation under extreme loads. The **five-bearing main journal design** provides optimal support for the massive displacement and high-revving nature of the LS3, while the **counterweighted configuration** minimizes vibration, allowing the engine to spin effortlessly through the powerband whether cruising at highway speeds or unleashing its full potential in a high-RPM burst. The **nitrided surface treatment** on critical bearing surfaces enhances wear resistance, ensuring longevity even under aggressive driving conditions or aftermarket modifications, such as forced induction or nitrous oxide enhancements.

Beyond its mechanical prowess, this crankshaft is a testament to General Motors engineering legacy, serving as the backbone of the **C6 Corvette s third-generation LS platform**, which also powered the **ZR1 supercar** (when paired with its supercharged variant). Whether installed in a stock 2009 Corvette, a restored classic, or a custom-built high-performance engine, this crankshaft delivers the reliability and responsiveness that Corvette enthusiasts demand. For those seeking to push the boundaries of their LS3 engine, this component is a foundational element one that, when paired with a matching set of **forged connecting rods, high-quality bearings, and a properly tuned oil system**, can transform a stock engine into a **600 horsepower beast** capable of dominating the track or the open road. With its combination of strength, precision, and heritage, the **2009 Chevrolet Corvette LS3 crankshaft** remains an essential and sought-after part for anyone serious about preserving or enhancing the soul of America s most revered sports car.

### **Pros and Cons of Buying a 2009 Chevrolet Corvette (LS3 V8 Engine, GM1Z09 Crankshaft)**

#### **Pros**

1. **Strong Engine Performance**

The 2009 Corvette features the **6.2L LS3 V8**, producing **430 horsepower** and **420 lb-ft of torque**, which remains a capable and reliable powerplant for its era. The GM1Z09 crankshaft is a robust component designed for high-performance applications, ensuring durability under heavy loads.

2. **Proven Reliability (When Maintained Properly)**

The LS3 engine is known for its longevity when serviced correctly. Many examples with proper oil changes, cooling system maintenance, and timing belt replacements (if applicable) can easily exceed **150,000 200,000 miles**. The GM1Z09 crankshaft is a standard production part, meaning it is well-tested and widely supported.

3. **Strong Aftermarket Support**

The LS3 platform has a **massive aftermarket**, including performance parts, tuning solutions, and readily available replacement components. This makes upgrades (such as forced induction, suspension modifications, or engine swaps) relatively straightforward.

4. **Classic Corvette Design with Modern Features**

The C6 Corvette (2005 2013) retains the **iconic mid-engine layout** while incorporating modern amenities like **stability control, traction control, and a comfortable interior**. The 2009 model also introduced minor refinements, such as improved sound insulation and a slightly revised suspension setup.

5. **Potential for Future Value (If Well-Maintained)**

While not a high-end collector car, a **low-mileage, well-documented 2009 Corvette with a GM1Z09 crankshaft** could appreciate in value over time, especially if demand for C6 models remains steady. Restomods and classic performance cars often hold value well.

6. **Lower Cost of Ownership Compared to Modern Supercars**

Compared to contemporary hypercars or even newer performance cars, the **2009 Corvette is relatively affordable to insure, fuel, and maintain**. Parts are widely available, and labor costs are lower than for exotic brands.

7. **Driving Experience**

The C6 Corvette offers a **balanced mix of handling, power, and comfort**, making it enjoyable for both daily driving and track use. The LS3 s smooth power delivery and the mid-engine layout provide a **neutral, engaging driving experience**.

---

#### **Cons**

1. **Aging Technology and Reliability Risks**

- **Oil leaks** (valve cover gaskets, oil pan gaskets, rear main seal)

- **Cooling system issues** (thermostat housing leaks, water pump failures)

- **Timing chain stretch** (if not serviced, can lead to timing issues)

- **Transmission (6-speed manual or 6T70 automatic) wear** (clutch or torque converter issues in automatics)

The **GM1Z09 crankshaft itself is durable**, but surrounding components (like the **oil pump, bearings, or rod bearings**) can fail if the engine is not properly maintained.

2. **Higher Maintenance Costs Than a Daily Driver**

- **Oil changes every 5,000 7,500 miles** (synthetic oil recommended)

- **Cooling system flushes every 30,000 50,000 miles**

- **Timing chain inspection/replacement (if applicable)**

- **Suspension and brake upgrades** (due to aggressive driving habits)

3. **Depreciation**

The Corvette has **always depreciated quickly**, and the 2009 model is no exception. While it may hold value better than some contemporaries, it is **not an investment-grade car**. Buyers should expect to lose **30 50% of the original value** over 5 10 years.

4. **Fuel Economy Limitations**

The LS3 V8 is **not fuel-efficient**, averaging **14 16 MPG combined**. High-performance driving (especially with a manual transmission) will further reduce efficiency, making it **expensive to operate** compared to modern turbocharged or hybrid alternatives.

5. **Potential for Hidden Issues**

- **Rod bearing or main bearing wear** (check for oil consumption, knocking noises)

- **Exhaust manifold cracks** (common in early LS3s)

- **Transmission or drivetrain issues** (especially in high-mileage examples)

- **Electrical gremlins** (common in older GM vehicles)

6. **Insurance Costs**

The Corvette is **not cheap to insure**, especially for younger or inexperienced drivers. **Full coverage can cost $2,000 $4,000 per year**, depending on location and driving history.

7. **Limited Modern Tech Compared to Newer Models**

While the C6 Corvette was advanced for its time, newer Corvettes (C7 and C8) offer **better tech (infotainment, driver aids, aerodynamics)**. If you want **cutting-edge features**, a newer model may be more appealing.

---

### **Recommendation**

#### **Who Should Buy a 2009 Chevrolet Corvette with a GM1Z09 Crankshaft?**

**Enjoy classic American muscle with modern performance** and want a **fun, mid-engine sports car**.

**Are prepared for higher maintenance costs** and willing to **invest in upkeep** (oil changes, cooling system, suspension).

**Prioritize driving experience over daily practicality** (not a commuter car).

**Appreciate the LS3 platform s aftermarket potential** and may want to **modify or upgrade** the engine or suspension.

**Have experience with high-performance vehicles** and understand the risks of aging components.

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

**Want a low-maintenance, fuel-efficient daily driver**.

**Cannot afford high insurance premiums or unexpected repair costs**.

**Prefer modern tech (touchscreens, advanced safety features, hybrid/electric options)**.

**Are not comfortable with manual transmission (if buying a manual) or automatic transmission quirks**.

**Plan to keep the car long-term without significant investment in maintenance**.

#### **Final Recommendation**

If you **find a well-documented, low-mileage (under 50,000 miles) 2009 Corvette with a GM1Z09 crankshaft**, and it has **proper service records (oil changes, cooling system, timing chain)**, it can be a **fantastic purchase** for an enthusiast. However, **budget for at least $10,000 $15,000 in maintenance over the next 3 5 years** to keep it running smoothly.

- If you want **better reliability and lower maintenance**, consider a **used C7 Corvette (2014 2019)** with the **LT1 or LT2 engine**.

- If you prefer **modern tech and efficiency**, look at a **BMW M240i, Porsche 718 Cayman, or Tesla Model 3 Performance**.

- If you want **a more affordable classic performance car**, a **used Mustang GT or Camaro SS** (with proper maintenance) could be a better balance of fun and practicality.

The **2009 Corvette with a GM1Z09 crankshaft is a great choice for a passionate driver** who understands its quirks and is willing to put in the effort to keep it running. However, it is **not a set-and-forget vehicle** it demands **attention and investment** to avoid costly failures. If you re ready for that commitment, it will reward you with **unmatched driving excitement**. If not, consider a more modern or lower-maintenance alternative.

Details:

Part Notes: LS7 CRANKSHAFT. CORVETTE 2009 Crankshaft 262671 This part was removed from a with 12000 miles on it.

part #: 303.gm1z09 prices

• $664.59-$1000.00

specifications cranshafengin:

• for models: 303, Corvette
• for makes: Chevrolet
• for years: 2009
• model: Corvette
• part type: Crankshaft
• conditions options: Ls7 Crankshaft. Freshly Machined Sk
• genuine oem: Yes
• ipn: 303.gm1z09
• manufacturer warranty: 90 Day

shipping cranshafengin:

• cost: $0.00
• type: Fixed
• service: UPS Ground
• carrier: UPS
• transit: 5-8 Days
• class: Standard

offer cranshafengin:

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

payments cranshafengin:

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

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

returns cranshafengin:

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

seller cranshafengin:

• # reviews: 4770
• rating: 99.0%
• city: Eagle River, Wisconsin

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