Rebuilding a 2-Hole Corvette Engine: Factory Freak Power Achieved!

Engine Catastrophe and Repair

• 💥 The 2010 Corvette Grand Sport's engine was found with two holes in the block and a snapped connecting rod, likely due to overfilling the engine oil causing a hydro lock.
• 🛠️ A skilled welder, Blaine, repaired the damaged block by welding the holes and cracks, allowing for a "better than factory spec" rebuild.

Precision Engine Rebuild

• 🎯 The goal was to build an LS3 engine with greater precision than the factory by meticulously measuring and adjusting components for increased power.
• ⚙️ Key steps included replacing a sleeve, honing and decking the block, and installing new gaskets and seals for the front and rear covers.
• 💧 Special attention was paid to the dry sump oiling system, including the barbell seal and the integrated pickup tube within the oil pan.

Engine Installation and First Start

• 🚀 The fully rebuilt engine was installed into the Corvette, along with a factory clutch and flywheel, after thorough cleaning of the dry sump tank to remove debris.
• 🔥 The initial startup produced significant smoke, attributed to oil on the exhaust manifolds, but confirmed good oil pressure.
• ✅ After addressing minor issues like a loose AC compressor bracket and a fuel rail installed backward, the engine ran smoothly, albeit with some initial belt noise that was later resolved.

Break-in, Testing, and Sale

• 🛣️ The Corvette underwent a 300-mile break-in period, varying RPMs and loads, with multiple oil changes using Amsoil break-in oil.
• 📊 A dyno test revealed the LS3 produced 405 horsepower and 418 ft-lbs of torque at the wheels, exceeding stock expectations and confirming it as a "factory freak."
• 💰 The car was subsequently sold for a profit, highlighting the financial benefits of DIY repairs and rebuilds.

Final Touches and Driving

• ✨ The engine bay was detailed using Amsoil's MudSlinger, and fluids were serviced with Amsoil products.
• 💨 The exhaust rattle was fixed, and the car was driven to break in the engine, demonstrating its resurrected performance and smooth operation.
• 🏁 The Corvette Grand Sport was ultimately sold, with the owner expressing satisfaction with the project's success and the car's condition.