Toyota V35A Twin-Turbo V6 Engine: A Mechanical Deep Dive with Good and Bad News

Engine Construction and Design

• 💡 The V35A-FTS Twin Turbo V6 engine from a 2024 Toyota Tundra is explored, highlighting its new design and known issues.
• 🛠️ A two-piece front timing cover is noted, designed to prevent leaks where the cylinder head meets the block, though it introduces more sealing surfaces.
• ⚙️ The electronic wastegate is discussed, with a preference for its aluminum construction over plastic alternatives used by other manufacturers.
• 💨 The engine features a liquid-to-air intercooler integrated into the intake manifold design.
• ⚠️ The PCV valve's location at the rear of the engine, behind the intercooler, is criticized for being difficult to access.

Internal Components and Wear

• 🔍 The cylinder heads are smaller than previous GR engines, featuring hydraulic lifters and roller rockers, with a new green color for valve guide seals.
• ⚠️ Carbon buildup on intake valves is observed, even on an engine with potentially low mileage, suggesting potential running issues.
• 🔩 The crankshaft utilizes a four-main-bolt cradle design instead of individual caps, which is debated for its strength compared to six-bolt mains.
• 📉 Main bearings are examined, with a focus on the first main cap, which is often affected by machining debris according to recalls.
• 🧐 Rod bearings are found to have a wear-resistant coating, a new feature for Toyota bearings, but notably lack a locator groove.

Bearing Issues and Oil Flow

• ⚠️ A blued rod bearing indicates severe damage, likely due to running low on oil or a catastrophic event.
• ❓ The main bearings also lack locator tabs, raising questions about their tendency to