Dorman 420-177 Engine Timing Belt Tensioner

Reliable Engine Timing Belt Tensioner for Infiniti and Nissan

The Dorman 420-177 engine timing belt tensioner is designed to maintain proper tension on the timing belt for Infiniti 300ZX and Nissan J30 models. This automatic hydraulic tensioner ensures consistent belt tension, helping to optimize engine performance and prevent timing belt slippage.

• Constructed from durable ductile iron for long-lasting strength
• Automatic hydraulic tensioner style for consistent belt tension
• Cast steel contact surface material for reliable operation
• Standard replacement grade for dependable performance
• Includes one tensioner; bracket and pulley not included

Durable Materials and Design for Engine Timing Systems

The Dorman 420-177 timing belt tensioner features a robust ductile iron body that withstands the stresses of engine operation. Its cast steel contact surface ensures smooth engagement with the timing belt, reducing wear and extending component life. As an automatic hydraulic tensioner, it adjusts tension dynamically, eliminating the need for manual adjustments and helping maintain optimal timing belt alignment on Infiniti 300ZX and Nissan J30 vehicles.

Compatible Applications and Common Issues Addressed

This timing belt tensioner is compatible with Infiniti 300ZX and Nissan J30 models, providing a direct replacement for worn or failing tensioners. It is designed to address several common engine timing issues, including:

• Timing belt slack or improper tension
• Noise caused by a loose or failing tensioner
• Premature timing belt wear or damage
• Engine misfires related to timing belt slippage
• Potential engine damage from timing belt failure

Installation Notes and Tips

Installation of the Dorman 420-177 tensioner requires proper alignment and torque specifications as outlined in the vehicle service manual. Since this is an automatic hydraulic tensioner, no manual adjustment is necessary after installation. It is recommended to inspect the timing belt and related components during replacement to ensure overall system reliability.

Quality Assurance and Warranty Information

Dorman provides this timing belt tensioner as a standard replacement part, manufactured to meet or exceed OEM specifications. The product undergoes quality control testing to ensure durability and performance. Warranty coverage details can be obtained from Dorman, typically including limited warranties against defects in material and workmanship.