GMB 460-5857 Engine Timing Belt Tensioner Hydraulic Assembly

GMB 460-5857 Timing Belt Tensioner

The GMB 460-5857 engine timing belt tensioner hydraulic assembly is built for Subaru timing belt service where stable belt control matters. Manufactured to meet or exceed OEM specifications, it supports proper belt tension in Subaru Forester, Impreza, and Legacy applications with w/o Integrated Tensioner Assembly notes.

Key Features

• Engine timing belt tensioner hydraulic assembly for valve train service
• Manufactured to meet or exceed OEM specifications
• Metal pulley construction for durability
• 1 mm drive belt pulley diameter specification as listed
• 1-groove pulley design
• Serpentine and V-belt pulley type
• Part number 460-5857 for direct identification

Application Details

Compatible with 1990-1999 Subaru Legacy, 1993-1999 Subaru Impreza, and 1998-1999 Subaru Forester, w/o Integrated Tensioner Assembly. This GMB 460-5857 timing belt tensioner is a direct-fit service part for Subaru timing belt maintenance where the hydraulic assembly and pulley must maintain consistent belt tracking and tension.

This part cross-references Dayco 85043 and Gates T43204 for the same application.

Common Repair Uses

• Restores proper timing belt tension control
• Addresses belt noise caused by worn hydraulic tensioner components
• Helps correct timing belt slack during engine service
• Supports replacement of a worn pulley or tensioner assembly on Subaru Legacy, Impreza, and Forester models
• Assists with timing belt maintenance when the original assembly no longer holds tension consistently

Installation Notes

Verify engine configuration and confirm the vehicle is listed without an integrated tensioner assembly before installation. Inspect the timing belt system, pulley alignment, and related wear components during service. Follow Subaru service procedures and torque specifications for the specific engine application.

Quality Assurance

GMB states this assembly is manufactured to meet or exceed OEM specifications, supporting OE-level fit and function for the listed Subaru applications.