Gates 42187 Engine Water Pump

Reliable Water Pump Replacement for Toyota and Scion Vehicles

The Gates Water Pump (Standard) part number 42187 is engineered to provide dependable cooling system performance for select Toyota and Scion models. Designed with durable materials and precise specifications, this engine water pump supports efficient engine temperature regulation.

• Housing made from cast aluminum for strength and corrosion resistance
• Stamped steel impeller designed for reverse rotation
• Includes a rubber gasket for proper sealing
• Accessory belt drive style with included pulley
• Compatible with Toyota Corolla, Corolla iM, Scion iM, and Toyota C-HR models

Product Line Details: Gates Water Pump (Standard)

The Gates Water Pump (Standard) line focuses on providing reliable, OEM-quality water pumps that meet original equipment specifications. This product line emphasizes durable construction and precise fitment, ensuring proper engine cooling without including additional components such as thermostats or back housings. Part number 42187 exemplifies this approach by offering a straightforward replacement water pump with essential features for effective operation.

Technical Description and Features

This engine water pump features a cast aluminum housing that offers a balance of lightweight design and resistance to corrosion, contributing to long service life. The impeller is made from stamped steel and is designed to rotate in reverse, matching the original equipment rotation direction for the specified vehicles. The pump is driven by the accessory belt and comes with an included pulley, facilitating direct replacement without the need for additional parts. Note that this water pump does not include a back housing, thermostat, thermostat housing, or fan clutch, focusing solely on the core water pump assembly and gasket.

Applications and Common Issues Addressed

• Replacement for failing or leaking water pumps in Toyota Corolla and Scion iM models
• Resolves overheating issues caused by impeller wear or housing corrosion
• Addresses coolant leaks due to gasket failure or pump seal degradation
• Restores proper coolant circulation in Toyota C-HR accessory belt-driven cooling systems
• Prevents engine damage from inadequate cooling in compatible vehicles

Installation Notes and Tips

When installing the Gates Water Pump (Standard) 42187, ensure the engine is cool and the cooling system is properly drained before removal. Verify the impeller rotation matches the original pump to maintain correct coolant flow. Use the included rubber gasket to achieve a secure seal and prevent leaks. Since the pump is accessory belt-driven and includes the pulley, inspect the belt condition and tension during installation for optimal performance. This water pump does not include a thermostat or back housing, so those components must be reused or replaced separately if needed.

Quality Assurance and Warranty

Gates manufactures the Water Pump (Standard) line to meet or exceed OEM standards, ensuring reliable operation and fitment. Part number 42187 undergoes rigorous quality control to maintain durability and performance. While specific warranty details are not provided here, Gates typically offers limited warranties on their water pumps; consult product documentation or authorized sources for exact warranty terms.