Dorman 300-942 Engine Water Pump Pulley

Engine Water Pump Pulley Replacement

Dorman 300-942 is a standard replacement engine water pump pulley for select Ford and Mercury applications. It restores the pulley interface on the water pump with a steel, bolt-on design built for serpentine belt systems.

Use this Dorman water pump pulley when the original pulley is damaged, worn, or no longer running true. It is a direct replacement for the factory part on specific Ford Ranger, Ford Explorer, Ford Explorer Sport Trac, Ford Mustang, and Mercury Mountaineer models.

Key Features

• Direct replacement water pump pulley for select vehicles
• Steel construction with black finish
• Bolt-on attachment type
• Serpentine pulley and belt type
• 4.62 in. diameter and 1.83 in. depth
• 4 bolt holes with 0.35 in. bolt hole diameter
• Standard replacement grade
• Cross-reference: Ford 6L2Z8509AA

Detailed Description

This Dorman 300-942 engine water pump pulley is engineered for vehicles using a serpentine belt drive and a bolt-on pulley mounting pattern. The steel construction and black finish match the needs of a replacement pulley in the cooling system drive path, helping restore proper belt tracking and water pump operation after pulley damage or wear. Compatible With 1993-2011 Ford Ranger, 1994-2010 Ford Explorer, 2001-2005 Ford Explorer Sport Trac, 2007-2010 Ford Explorer Sport Trac, 2005-2010 Ford Mustang, 1998-2010 Mercury Mountaineer, and 1993 Ford Explorer from 2/93. This part number, 300-942, is a practical OE-style solution for drivers searching for a Ford Ranger water pump pulley replacement or a Ford Explorer serpentine water pump pulley.

What It Helps Solve

• Wobbling or bent water pump pulley
• Noise from a damaged serpentine pulley
• Belt misalignment at the water pump
• Wear from a cracked or corroded pulley surface
• Loss of proper accessory drive operation

Installation Notes and Tips

Verify pulley diameter, bolt-hole count, and attachment style before installation. This pulley uses a bolt-on mounting design and does not include installation hardware or instructions. Confirm vehicle-specific fitment for your Ford Ranger, Ford Explorer, Ford Mustang, or Mercury Mountaineer before ordering. The part number 300-942 should be matched to the original pulley dimensions and belt routing.

Quality Assurance

Dorman supplies standard replacement components for repair applications where original parts need to be restored to service. This pulley is built as a direct replacement for the factory water pump pulley on the listed vehicles and cross-references Ford 6L2Z8509AA.