HomeBelts and Cooling > Water Pump and Related ComponentsGates 42250 Engine Water Pump
Part #: 42250

Gates 42250 Engine Water Pump

Water Pump (Standard)
⚙️ 26 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Water Pump (Standard)
🚗Fitment: Toyota, 4Runner, T100, Tacoma, and Tundra
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Reliable Cooling with Gates Water Pump (Standard) 42250

The Gates Water Pump (Standard) 42250 is engineered to maintain optimal engine temperature for Toyota 4Runner, T100, Tacoma, and Tundra models. Designed for timing belt-driven engines, this water pump ensures consistent coolant circulation to prevent overheating and maintain engine performance.

  • Housing made from durable cast aluminum for corrosion resistance
  • Stamped steel impeller with reverse rotation for efficient coolant flow
  • Includes metal gasket and o-ring for secure sealing
  • Single outlet design compatible with specific Toyota models
  • Comes with pulley included for direct timing belt drive integration

Product Line Overview: Water Pump (Standard)

The Gates Water Pump (Standard) line focuses on delivering dependable engine water pumps designed to meet OEM specifications. This product line emphasizes quality materials such as cast aluminum housings and stamped steel impellers to provide reliable cooling system performance. The 42250 model fits within this line, offering a timing belt-driven solution tailored for select Toyota vehicles.

Detailed Product Description

This engine water pump features a cast aluminum housing that offers strength and resistance to corrosion, extending the service life of the cooling system. The stamped steel impeller rotates in reverse, optimizing coolant flow through the engine block and radiator. The pump is designed with a single outlet and does not include a back housing or thermostat housing, focusing on core water pump functionality. The included pulley facilitates direct drive via the timing belt, ensuring synchronized operation with the engine’s timing components.

Common Applications and Issues Addressed

  • Prevents engine overheating by maintaining proper coolant circulation
  • Replaces worn or damaged water pumps in Toyota 4Runner, T100, Tacoma, and Tundra models
  • Eliminates coolant leaks caused by failing seals or gaskets
  • Resolves noisy or inefficient water pump operation due to impeller wear
  • Supports timing belt-driven cooling systems requiring precise pump integration

Installation Notes and Tips

Ensure compatibility with your Toyota model before installation. The water pump 42250 is designed for timing belt-driven engines, so proper timing belt alignment is critical during replacement. Use the included metal gasket and o-ring to achieve a secure seal and prevent coolant leaks. Verify that the pulley is correctly installed and aligned to avoid premature belt wear or pump failure.

Quality Assurance and Warranty

Gates water pumps are manufactured to meet or exceed OEM standards, using high-quality materials such as cast aluminum and stamped steel. While specific warranty details for part number 42250 should be confirmed with the supplier, Gates typically offers coverage against defects in materials and workmanship to ensure reliable performance.

BrandGates
Part Number42250
PositionWater Pump (Standard)
Housing MaterialCast aluminum
Impeller MaterialStamped steel
Impeller RotationReverse
Includes Back HousingNo
Outlet Quantity1
Thermostat And Housing IncludedNo
ContentsWater pump, metal gasket, o-ring
Drive StyleTiming belt
Fan Clutch IncludedNo
Pulley IncludedYes
Timing Belt DrivenYes

This part fits 26 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2004ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2004ToyotaTundra3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2003ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2003ToyotaTundra3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2002Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
2002ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2002ToyotaTundra3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2001Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
2001ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2001ToyotaTundra3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2000Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
2000ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
2000ToyotaTundra3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1999Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
1999ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1998Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
1998ToyotaT1003.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1998ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1997Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
1997ToyotaT1003.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1997ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1996Toyota4Runner3.4LV6GASN/ATiming Belt Driven; Water Pump (Standard)
1996ToyotaT1003.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1996ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1995ToyotaT1003.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)
1995ToyotaTacoma3.4LV6GASN/AW/Oil Cooler; Timing Belt Driven; Water Pump (Standard)

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

131-22161610069395161006939583161006939616100693971610069398161006939883170-197018-148418-17651AMWP000392-915220721224060224072252-540252-8764225051-210155-932455-9444555341657148694225097192AW9324AW9444BWP-9152CP9324DP352FP2348NP1770P-2423PWP9152QPW66T2236US9324WP-9152WPT100

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.