CADILLAC 12619168 Gm Engine Block Genv 12667087 L86 6.2L 404

( Brand: Cadillac ), ( Manufacturer Part Number: 12619168 ), ( Bore Size: 4.065 ), ( Type: Engine Block ), ( Ipn: 12667087 ), ( Id: Mjc 2602404 ), ( Importapart: 314-502-3104 ), ( Country Of Origin: United States ), ( Location: F1 )

Review CADILLAC Chevrolet Gmc Gm L86 6.2l Bare Engine Block Bore Genv 404 fits CORVETTE SILVERADO CAMARO LT1 STD 2014–2019

The **GM 12619168** is a meticulously crafted, high-performance engine block designed exclusively for the **2014 2019 Chevrolet Corvette, Cadillac ATS-V, and GMC/Yukon Denali LT1/L86 variants**, as well as the **2014 2019 Chevrolet/GMC Silverado and GMC Sierra 6.2L V8 platforms**, including the legendary **C5/C6/C7 Corvette s LT1 and the high-revving L86 performance engine**. This **bare engine block** represents the foundational core of General Motors **Gen IV LS-based architecture**, a legendary design known for its durability, high-stress casting, and precision machining. Engineered from **high-strength ductile iron**, this block features **interference-fit cylinder bores** with **cross-drilled oil passages** for superior lubrication and heat dissipation, ensuring long-term reliability even under extreme power demands. The **404-series Gen IV design** incorporates **integrated oil squirt nozzles** for piston cooling, **high-flow main and rod bearings**, and **precision-machined crankshaft journals**, all optimized for both **daily driving torque** and **high-revving performance** making it ideal for both street and track applications. Whether you're restoring a **C7 Corvette Stingray, a high-output Silverado HD, or a rare L86-powered truck**, this block serves as the backbone of GM s most iconic V8 engines, offering a perfect blend of **heritage engineering and modern performance**. Built to exacting GM specifications, it is ready for **custom cylinder heads, forged internals, or high-flow fueling upgrades**, allowing for endless tuning potential while maintaining the integrity of the original architecture. Perfect for enthusiasts seeking a **direct replacement or a blank canvas for a custom build**, this block embodies the spirit of GM s legendary LS engine family where power, precision, and reliability converge.

### **Pros and Cons of Buying a Used GM LT1/L86 6.2L V8 Engine Block (2014 2019 Corvette, Silverado, Camaro Gen V, 404 Series)**

This engine block is a high-performance, naturally aspirated V8 used in GM s performance lineup from 2014 to 2019. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

---

### **Pros**

1. **Proven Reliability and Durability**

- The LT1/L86 engines are based on GM s **LS-series architecture**, which has a long track record of reliability when maintained properly. The 6.2L V8 is a refined version of the LS3, with improved internals (e.g., forged crankshaft, stronger connecting rods, and a more robust block).

- The **L86** (used in the Camaro ZL1 and Corvette Z06) is a high-performance variant with additional reinforcement for track use, making it more robust than the standard LT1.

2. **High Performance and Power Output**

- **LT1 (Corvette, Silverado SS, Camaro SS):** Produces **455 460 hp** (depending on year and application) with **460 lb-ft of torque**. It features **direct port injection (DPI)**, which improves throttle response and fuel efficiency compared to older port-injected LS engines.

- **L86 (Camaro ZL1, Corvette Z06):** Delivers **650 hp** (Camaro) or **670 hp** (Corvette) with **650 lb-ft of torque**. It uses **high-flow heads, a larger camshaft, and a more aggressive valve train**, making it a track-focused powerplant.

- Both engines rev enthusiastically (up to **7,000 RPM**), offering a fun, engaging driving experience.

3. **Modern Technology and Features**

- **Direct Port Injection (DPI):** Improves efficiency and reduces carbon buildup compared to traditional port injection.

- **Variable Valve Timing (VVT):** Enhances power and efficiency across the RPM range.

- **High-Strength Materials:** The block is cast from **A390 aluminum**, and critical components (crankshaft, rods, pistons) are forged for longevity.

- **Electronic Throttle Control (ETC):** Smoother response and better tunability.

- **OBD-II Compatible:** Easier to diagnose and modify with aftermarket tuning solutions.

4. **Aftermarket Support and Tuning Potential**

- **Performance parts** (headers, exhaust, intake, camshafts, fuel pumps).

- **Tuning solutions** (HP Tuners, Haltech, AEM, etc.) for increased power.

- **Support for forced induction** (turbocharging is possible but requires significant modifications).

- The **ECU is programmable**, allowing for easy power adjustments without major hardware changes.

5. **Compatibility with Modern Applications**

- The **Gen V 404-series engine** (used in 2014 2019 models) is **backward-compatible** with many LS-series parts, making repairs and upgrades easier.

- The **transmission options** (6-speed manual, 6-speed automatic, 8-speed automatic in later models) provide flexibility depending on the application.

6. **Resale Value and Enthusiast Appeal**

- The **Corvette, Camaro SS, and Silverado SS** with LT1 engines retain strong resale value due to their performance reputation.

- The **L86** is particularly desirable among enthusiasts, making it a good investment if you plan to sell later.

7. **Fuel Efficiency (Compared to Older LS Engines)**

- The **LT1** is more efficient than its predecessors (e.g., LS3) due to DPI and VVT, making it a better daily driver than raw power-focused engines like the LS9.

---

### **Cons**

1. **Higher Maintenance Costs**

- **More frequent oil changes** (every 5,000 miles for L86, 7,500 for LT1).

- **Expensive replacement parts** (e.g., **forged crankshafts, rods, and pistons** in L86 are costly if damaged).

- **High-performance fuel requirements** (91 octane for LT1, **93 for L86** to prevent detonation).

- **Timing chain stretch** can occur over time, requiring replacement (common in high-mileage examples).

2. **Potential for Carbon Buildup (LT1)**

- While DPI reduces carbon issues compared to port injection, **high-performance driving (track use, aggressive throttle) can still cause carbon deposits** on intake valves.

- **Solution:** Regular **intake valve cleaning** (e.g., carbon spray, professional cleaning) is recommended.

3. **Transmission and Drivetrain Wear**

- The **6-speed manual (in Camaro/Corvette)** is robust but can wear out if abused.

- The **6-speed automatic (6L80)** in Silverado SS and Camaro SS is reliable but **not as durable as the 8-speed (8L90)** in later models.

- **Differential and drivetrain components** (e.g., rear end, driveshafts) may need attention if the vehicle has been heavily modified or driven aggressively.

4. **Electrical and Sensor Issues**

- GM s **OBD-II systems** can be finicky, with **faulty sensors (MAF, crankshaft position, camshaft position)** being a common issue.

- **ECU glitches** may require **reflashing or replacement** if the vehicle has been modified.

- **Starter and alternator failures** are not uncommon in high-mileage examples.

5. **Cost of Repairs**

- **Labor costs** for GM performance vehicles can be **higher than average** due to specialized knowledge required.

- **Specialty parts** (e.g., **L86-specific components**) are more expensive than mass-market LS parts.

- **Replacement engines** (if the block is damaged) can cost **$5,000 $10,000 **, depending on condition and modifications.

6. **Noise and Vibration (Especially L86)**

- The **L86 is loud** (intake and exhaust noise is aggressive, even with stock headers).

- **Vibration can be noticeable** at certain RPM ranges, particularly in the **Camaro ZL1** due to its high-revving nature.

- **Road noise** in the **Silverado SS** can be intrusive in a daily driver setting.

7. **Depreciation (For Some Applications)**

- While **Corvette and Camaro SS** hold value well, **Silverado SS** depreciates faster due to its truck application.

- **L86 engines** in **Camaro ZL1** and **Corvette Z06** retain value better than standard LT1 engines.

8. **Modification Risks**

- **Forced induction (turbocharging)** is possible but **requires significant modifications** (reinforced internals, upgraded fuel system, cooling).

- **Supercharging** is not recommended due to the risk of **valve float and rod bearing failure**.

- **Improper tuning** can lead to **detonation, valve damage, or catastrophic failure**.

---

### **Conclusion**

The **GM LT1/L86 6.2L V8 engine block** is one of the best high-performance V8s from the 2010s, offering a **balance of power, reliability, and tunability**. It is ideal for:

- **Enthusiasts** who want a **fun, high-revving engine** with strong aftermarket support.

- **Performance trucks (Silverado SS)** or **muscle cars (Camaro SS)** that benefit from its **torque and durability**.

- **Track-focused applications (L86 in ZL1/Z06)**, where its **reinforced internals** make it more robust than street-focused LT1s.

- **Budget-conscious buyers**, as maintenance and repairs can be expensive.

- **Daily drivers who prioritize silence and comfort** (the noise and vibration may be off-putting).

- **Those unwilling to invest in regular maintenance** (oil changes, carbon cleaning, sensor checks).

---

### **Recommendation**

- You are an **enthusiast** who enjoys **high-performance driving** and doesn t mind **higher maintenance costs**.

- You plan to **modify or tune** the engine (LT1/L86 responds well to upgrades).

- You want a **reliable, high-revving V8** for a **Camaro SS, Corvette, or Silverado SS**.

- You are prepared for **regular oil changes (every 5K 7.5K miles)** and **carbon cleaning**.

- You can afford **potential transmission or drivetrain upgrades** if needed.

####

Details:

This will likely need a small overbore to clean up completely. This was carefully removed from an engine with a bad lifter on one cylinder. The cylinder head mounting surfaces are nice with no deep scratches or any visual damage outside of typical fine and some leftover gasket material. All 5 main caps and bolts are included.

The lifter bores look great, and the that went bad was not deformed, did no damage to its bore. The cylinders are standard bore 4.065 , and have some scuffing wear, but no visible cracks, heavy rust, or any other structural damage. When disassembled, there were no spun bearings or any damage to the pistons squirts. 2014 2019 Chevrolet Silverado 1500 and GMC Sierra.

Optional lift gate service available to other addresses upon request. Bare engine block from a 2018 Chevrolet Camaro SS with 93k miles.

part #: 12619168 prices

• $1299.00-$6660.23

specifications pistonringro:

• for models: Lt1, Std, Corvette, Silverado, Camaro
• for makes: Chevrolet, Gmc, Cadillac
• for years: 2014-2019
• brand: Cadillac
• mpn: 12619168
• bore size: 4.065
• type: Engine Block
• ipn: 12667087
• id: Mjc 2602404
• importapart: 314-502-3104
• country of origin: United States
• location: F1

general pistonringro:

• Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings
• condition: Used

shipping pistonringro:

• class: Freight
• cost: $300.00
• type: Fixed
• service: Flat Rate Freight

payments pistonringro:

• wallet: Paypal
• credit card: Discover
• other

seller pistonringro:

• city: Hazelwood, Missouri
• rating: 100.0%
• # reviews: 42210

returns pistonringro:

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

offer pistonringro:

• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 30, 2026
• availability: In Stock

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