Gates 42345 Engine Water Pump - Main

Gates Water Pump for Audi Timing Belt Applications

The Gates 42345 engine water pump is built for Audi timing belt service where reliable coolant circulation matters. It is a standard water pump with a cast aluminum housing, plastic impeller, and reverse rotation design for the listed interference-engine applications.

Compatible with select 2000-2005 Audi A6 Quattro, Audi Allroad Quattro, Audi S4, and 2002 Audi RS4 applications, this Gates Water Pump (Standard) is a direct-fit cooling component for timing belt-driven setups. The 42345 part number is also a useful reference when cross-shopping OE-style replacements for these vehicles.

Key Features

• Cast aluminum housing for strength and corrosion resistance
• Plastic impeller with reverse rotation design
• Timing belt driven construction
• Includes water pump, gasket, and O-ring
• Pulley included
• No back housing, thermostat housing, or fan clutch included

Product Details

Gates Water Pump (Standard) line components are built for dependable service in cooling systems that rely on precise belt-driven operation. This water pump uses premium alloy materials and is tested for seal and bearing function as well as leakage before release. For Audi timing belt service, the Gates 42345 helps restore proper coolant flow in interference-engine applications where water pump condition is critical.

This part cross-references Dayco DP220 and US Motor Works US9446 for the same application.

What It Helps Address

• Coolant leaks from a worn pump housing or seal
• Overheating caused by reduced coolant circulation
• Noise from failing pump bearings
• Timing belt service replacement needs on Audi V6 applications
• Cooling system maintenance on interference-engine vehicles

Installation Notes

• Fits 2000-2004 Audi A6 Quattro, Main, interference engine application; timing belt driven; water pump (standard)
• Fits 2001-2005 Audi Allroad Quattro, Main, interference engine application; timing belt driven; water pump (standard)
• Fits 2000-2002 Audi S4, Main, interference engine application; timing belt driven; water pump (standard)
• Fits 2002 Audi RS4, N/A, interference engine application; timing belt driven; water pump (standard)
• Replace the pump during timing belt service when access is already open
• Verify reverse-rotation routing and pulley alignment before startup

Quality Assurance

Gates manufactures this water pump with functional testing of seals and bearings, plus leakage testing of both the casting and assembled unit, to support consistent OE-quality fit and operation.