Dorman 917-253 Engine Variable Valve Timing (VVT) Sprocket - Intake

Overview of Dorman Engine Variable Valve Timing Sprocket

The Dorman 917-253 Engine Variable Valve Timing (VVT) Sprocket is designed for precise valve timing control in select Mazda vehicles. Engineered from durable steel with a silver zinc-plated finish, this standard replacement part ensures reliable performance for Mazda 3 and CX-7 models.

• Constructed from high-strength steel for durability
• Silver zinc-plated surface for corrosion resistance
• Standard replacement grade for dependable operation
• Overall dimensions: 4.05 inches in height and length
• Includes cam phaser and mounting bolt in package

Detailed Product Description

This Dorman Engine Variable Valve Timing Sprocket (part number 917-253) is specifically designed to maintain accurate timing of the camshaft in Mazda 3 and CX-7 engines equipped with VVT systems. The steel construction provides the necessary strength to withstand engine stresses, while the silver zinc plating offers protection against rust and wear. Measuring 4.05 inches in both height and length, this sprocket matches OEM specifications for seamless integration. The package includes the cam phaser and bolt, facilitating a complete replacement during service.

Compatible Vehicles and Applications

This VVT sprocket is compatible with the following Mazda models:

• Mazda 3
• Mazda CX-7

It is intended for use in engines equipped with variable valve timing systems requiring precise camshaft phasing for optimal engine performance.

Common Issues Addressed by This VVT Sprocket

• Irregular or noisy valve timing operation
• Reduced engine efficiency due to improper camshaft timing
• Check engine light triggered by VVT system faults
• Engine performance loss related to cam phaser wear
• Oil leaks or mechanical wear around the cam phaser area

Installation Notes and Tips

• Ensure engine is cool before beginning installation
• Use proper torque specifications for the included bolt
• Verify alignment marks on the sprocket and camshaft during installation
• Replace any worn seals or gaskets to prevent leaks
• Consult vehicle service manual for detailed VVT system procedures

Quality Assurance and Warranty

Dorman 917-253 is manufactured to meet or exceed OEM standards for fit and function. The steel material and corrosion-resistant plating contribute to long service life. This part is backed by Dorman's quality assurance processes, providing confidence in its reliability as a standard replacement component for Mazda 3 and CX-7 engines.