Gates T42113 Engine Timing Belt Idler Pulley

Gates Timing Belt Idler Pulley T42113

The Gates T42113 timing belt idler pulley is a direct-fit engine timing component for select Chevrolet, Oldsmobile, and Pontiac applications. Built with a smooth backside contact surface and a flanged plastic pulley body, it supports stable timing belt routing in interference-engine setups.

Key Features

• Brand: Gates Timing Belt Pulley line
• Part number: T42113
• Engine timing belt idler pulley for valve train service
• Plastic pulley construction
• 12 mm inside diameter
• 67 mm outside diameter
• 42 mm width
• Smooth/backside contact surface
• Flanged end for belt tracking support
• Contents: pulley and bolt

Product Details

Gates PowerGrip idler pulleys are offered as fixed idlers or as replacements for tensioner bracket applications, depending on the engine design. This T42113 pulley uses a smooth backside running surface, which is the correct style for timing belt systems that ride on the back of the belt rather than a toothed sprocket. It is listed for 1991-1997 Chevrolet Lumina, 1995-1997 Chevrolet Monte Carlo, 1991-1996 Oldsmobile Cutlass Supreme, and 1991-1996 Pontiac Grand Prix applications, including interference-engine configurations where precise belt guidance matters. This part cross-references Dorman - Conduct-Tite 85474 for the same application.

What This Part Helps Address

• Timing belt noise caused by a worn idler pulley bearing
• Belt tracking issues from a damaged or uneven pulley surface
• Service needs on interference-engine timing belt systems
• Visible pulley wear, cracking, or rough rotation during inspection
• Replacement of a timing belt idler pulley during scheduled engine service

Installation Notes and Tips

Verify pulley dimensions, contact surface style, and engine application before installation. The smooth/backside design should match the belt routing used by the engine. Inspect the timing belt, tensioner, and related pulleys at the same time, especially on Chevrolet Lumina, Monte Carlo, Oldsmobile Cutlass Supreme, and Pontiac Grand Prix models with interference engines. Follow the vehicle service procedure for timing alignment and torque specifications.

Quality Assurance

Gates timing components are engineered for engine service applications and built to meet the dimensional and functional requirements of the listed fitments. The Gates T42113 is a timing belt pulley from the PowerGrip idler pulley line, designed for consistent belt guidance in the specified vehicles.