Gates 41078 Engine Water Pump

Engine Water Pump for Nissan Quest and Mercury Villager

The Gates 41078 engine water pump is a standard replacement for select 1999-2002 Nissan Quest and Mercury Villager applications. Built with a cast aluminum housing and cast iron impeller, it is engineered for dependable coolant circulation and OE-quality fit.

Key Features

• Gates Water Pump (Standard) line for direct-fit cooling system service
• Cast aluminum housing for durable pump construction
• Cast iron impeller with standard rotation
• Accessory belt driven design
• Includes water pump and gasket
• 100% functional testing of seals and bearings
• 100% leakage testing of the casting and assembled pump

Product Details

Gates part number 41078 is an engine water pump built for vehicles that use an accessory belt drive, not a timing belt-driven setup. The pump uses a cast aluminum housing and cast iron impeller to support consistent coolant flow, while the standard rotation design matches the original application. Gates also tests seals, bearings, and leakage at the casting and assembled pump level to help ensure proper operation. This part cross-references Airtex AW9402 and Beck/Arnley 131-2270 for the same application.

Compatible With 1999-2002 Nissan Quest and 1999-2002 Mercury Villager, this water pump is a practical choice for cooling system repair on these minivan platforms. The Gates 41078 is also a relevant search match for drivers looking for a 1999-2002 Nissan Quest water pump or a 1999-2002 Mercury Villager engine water pump replacement.

Common Problems This Part Can Address

• Coolant leakage from a worn pump seal or housing
• Overheating caused by reduced coolant circulation
• Noise from worn pump bearings
• Coolant loss related to pump casting or gasket failure
• Poor cooling system performance on high-mileage vehicles

Installation Notes and Tips

• Verify accessory belt drive configuration before ordering.
• Inspect the gasket surface and cooling passages during installation.
• Replace coolant and bleed air from the system after installation.
• Confirm standard impeller rotation matches the original pump.
• Check belt condition and tension while servicing the water pump.

Quality Assurance

Gates manufactures this water pump with premium alloy materials and performs seal, bearing, and leakage testing to support reliable cooling system service. The design is intended to deliver OE-quality fit for the listed Nissan Quest and Mercury Villager applications.