Gates T42034 Engine Timing Belt Idler Pulley - Lower

Gates Timing Belt Idler Pulley T42034

The Gates T42034 timing belt idler pulley is a smooth-backside pulley used in the engine valve train to help guide the timing belt along its proper path. Built with a plastic contact surface and supplied with the pulley, bushing, and bolt, it is a direct-fit service part for select Ford and Mercury applications.

Gates PowerGrip idler pulleys are offered as fixed idlers or as replacements for tensioner bracket applications, with metallic or plastic construction depending on the application. The T42034 follows that product-line approach with a smooth surface for backside belt contact and the dimensions needed for the specified engine setup.

Key Features

• Brand: Gates Timing Belt Pulley
• Part number: T42034
• Plastic pulley construction
• Smooth/backside contact surface
• Inside diameter: 17 mm
• Outside diameter: 47 mm
• Width: 29 mm
• Non-flanged end design
• Contents: pulley, bushing, bolt

Fitment

• Fits 2000-2004 Ford Focus, lower. Compatible with interference engines.
• Fits 1998-2003 Ford Escort, lower. Compatible with interference engines.
• Fits 1999-2002 Mercury Cougar, lower.
• Fits 1998-2000 Ford Contour, lower.
• Fits 1998-2000 Mercury Mystique, lower.

Detailed Description

This Gates timing belt idler pulley T42034 is engineered for lower timing belt routing on select Ford Focus, Ford Escort, Mercury Cougar, Ford Contour, and Mercury Mystique models. The smooth backside contact surface is used where the timing belt rides against the pulley’s outer face, while the plastic body helps match the application-specific design requirements of the engine system. This part cross-references Cloyes 9-5477 and GMB 425-9390 for the same application.

What It Helps Address

• Timing belt tracking noise from a worn idler pulley
• Belt misalignment caused by pulley wear or surface damage
• Rough pulley rotation that can affect timing belt operation
• Service replacement needs on lower timing belt routing
• Maintenance on interference-engine applications where timing components are critical

Installation Notes and Quality

Verify pulley dimensions, belt routing, and engine application before installation. Inspect the timing belt system for wear on adjacent components and confirm the lower position matches the vehicle’s original setup. Gates PowerGrip timing components are built for application-specific engine service, and the T42034 is supplied as a pulley service part with matching bushing and bolt details listed in the product data.