Dorman 300-406 Engine Harmonic Balancer Pulley

Dorman 300-406 Harmonic Balancer Pulley

This Dorman harmonic balancer pulley is built to match the original fit and function for specified Toyota applications. It is a direct replacement for Toyota 4Runner, Toyota Pickup, and Toyota T100 models that use a V-belt drive, with dimensions and mounting points engineered for proper alignment.

• Direct replacement harmonic balancer pulley for select Toyota engines
• Inside diameter: 2.44 in.; outside diameter: 6.1 in.
• Depth: 0.89 in. with 4 mounting holes
• Single-groove design for V-belt systems
• Regular grade construction for dependable everyday service
• Part number 300-406 for easy identification

Fitment Details

• Fits 1988-1995 Toyota 4Runner, N/A
• Fits 1988-1995 Toyota Pickup, N/A
• Fits 1993-1994 Toyota T100, N/A

Use this pulley when replacing a worn, cracked, or out-of-round harmonic balancer pulley on a Toyota 4Runner, Toyota Pickup, or Toyota T100. The 300-406 is designed around the original pulley dimensions, including the 2.44-inch inside diameter, 6.1-inch outside diameter, and 4-hole mounting pattern, to help maintain correct belt tracking in V-belt applications. This Dorman 300-406 pulley is a practical OE-style replacement for engines that rely on a single-groove accessory drive.

Common Repair Uses

• Restores proper belt alignment when the original pulley is worn
• Addresses vibration or noise caused by a damaged pulley surface
• Replaces a pulley with cracked or deteriorated material
• Helps correct belt slip in V-belt engine drive systems
• Supports repair of front-end accessory drive issues on Toyota 4Runner, Toyota Pickup, and Toyota T100 models

Installation Notes

Verify pulley dimensions, mounting hole spacing, and belt type before installation. This part uses a 4-hole mounting pattern, does not include a center bolt, and does not include mounting hardware. Confirm the engine’s original pulley configuration matches the single-groove V-belt design before installation. For best results, inspect the belt and related front-drive components during service.

Quality Assurance

Dorman manufactures this pulley from quality materials and engineers it to match the fit and function of the original part on specified applications. Part number 300-406 is a direct replacement option for Toyota 4Runner, Toyota Pickup, and Toyota T100 service work.