Gates 34051 Engine Coolant Thermostat

Integrated Thermostat Housing for Toyota Cooling Systems

Gates 34051 is an integrated housing thermostat built for precise coolant temperature control in select Toyota applications. It is an OE-performance replacement for the thermostat housing assembly used on 2003-2024 Toyota 4Runner, 2005-2015 Toyota Tacoma, 2007-2014 Toyota FJ Cruiser, and 2005-2014 Toyota Tundra models.

The Gates Integrated Housing Thermostat line focuses on accurate temperature regulation in modern cooling systems where the thermostat and housing are combined into one assembly. Part number 34051 follows that design with a 180 degree opening temperature, a jiggle pin weep hole, and a single seal for service on the specified Toyota platforms.

Key Features

• Integrated housing thermostat design for OE-style cooling system service
• Start-to-open temperature: 180°F / 82°C
• 3 bolt holes for the specified housing mounting pattern
• Jiggle pin weep hole and jiggle pin/check valve: yes
• Outlet inside diameter: 1.141 in; outlet outside diameter: 1.353 in
• OE Performance rating for replacement use
• Non-electric thermostat construction

Detailed Description

Gates 34051 is engineered for Toyota trucks and SUVs that use an integrated thermostat housing. It helps maintain stable engine operating temperature by regulating coolant flow at the OE temperature point, which is important for consistent warm-up, heater performance, and cooling system balance. This part number is listed for 2003-2024 Toyota 4Runner, 2005-2015 Toyota Tacoma, 2007-2014 Toyota FJ Cruiser, and 2005-2014 Toyota Tundra applications. Gates 34051 also cross-references Dorman OE Solutions 902-5148 for the same application.

The Gates Integrated Housing Thermostat product line addresses the growing use of combined thermostat and housing assemblies in late-model vehicles. For Toyota 4Runner, Tacoma, FJ Cruiser, and Tundra cooling system repair, this OE-performance replacement provides the correct temperature rating and housing configuration for direct service on the listed vehicles.

What It Helps Fix

• Engine running too cool or too hot due to thermostat control issues
• Temperature fluctuation during normal driving
• Slow cabin heat output from delayed coolant warm-up
• Cooling system service needs on integrated thermostat housing designs
• OE housing replacement needs on Toyota 4Runner, Tacoma, FJ Cruiser, and Tundra models

Installation Notes

• Verify the vehicle’s original thermostat housing style, bolt pattern, and outlet dimensions before installation.
• Confirm the 180°F / 82°C temperature specification matches the original application.
• Inspect mating surfaces, hoses, and seals during cooling system service.
• Follow the vehicle service manual for coolant refill and air bleeding procedures after installation.

Quality Assurance

Gates develops aftermarket thermostat solutions for integrated housing applications and positions this part as an OE-performance replacement for the listed Toyota vehicles. The design reflects Gates research and development focus on accurate temperature regulation in modern cooling systems.