Standard Ignition VVT685 Engine Variable Valve Timing (VVT) Sprocket - Exhaust

Overview of Standard Ignition VVT685 Engine Variable Valve Timing Sprocket

The Standard Ignition VVT685 is a precision-engineered engine variable valve timing (VVT) sprocket designed for select Lexus and Toyota models. This crankshaft gear plays a critical role in optimizing engine timing for improved performance and efficiency.

• Engine variable valve timing sprocket for accurate timing control
• Durable metal gear construction for long-lasting reliability
• Crankshaft gear type with 36 teeth and 3 timing marks
• Inside diameter of 1.33 inches (33.782 mm) with keyway notch for secure fitment
• Outside diameter of 4.41 inches (112.014 mm) and thickness of 0.21 inches (5.334 mm)
• Single mounting hole with a lug hole diameter of 0.49 inches (12.446 mm)

Detailed Product Description

The Standard Ignition VVT685 sprocket is manufactured from metal to ensure durability under the demanding conditions of engine operation. It features a crankshaft gear type with 36 teeth arranged in a single row, providing precise engagement with the timing chain. The sprocket includes three timing marks to assist in accurate installation and timing adjustments. Its inside diameter measures 1.33 inches (33.782 mm) and includes a keyway notch to guarantee proper alignment on the crankshaft. The outside diameter is 4.41 inches (112.014 mm), with a thickness and tooth width of 0.21 inches (5.334 mm), ensuring compatibility with the engine’s valve train components.

Compatible Vehicles and Applications

This VVT sprocket is compatible with various Lexus and Toyota models, including the Lexus GS300, IS200t, IS300, NX300, RC300, and the Toyota Camry. It is specifically designed to work with the variable valve timing system in these vehicles, helping to optimize engine performance and fuel efficiency.

Common Issues Addressed by the VVT685 Sprocket

• Irregular or poor engine timing affecting performance
• Variable valve timing system malfunctions or errors
• Engine misfires related to timing chain or sprocket wear
• Reduced fuel efficiency due to improper valve timing
• Noise or vibration caused by worn or damaged sprocket teeth

Installation Notes and Tips

When installing the Standard Ignition VVT685 sprocket, ensure the keyway notch aligns correctly with the crankshaft key to maintain proper timing. Use the three timing marks on the sprocket to verify correct positioning relative to the camshaft and timing chain. This sprocket is not adjustable and does not include installation hardware, so existing hardware should be inspected and reused or replaced as necessary. Proper torque specifications should be followed to avoid damage or misalignment.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and fitment. While specific warranty details for part number VVT685 are not provided here, Standard Ignition typically offers coverage against defects in materials and workmanship. It is recommended to consult the product documentation or manufacturer for exact warranty terms.