Gates 34240 Engine Coolant Thermostat

OE Type Thermostat for Ford Cooling Control

The Gates OE Type Thermostat 34240 is built for precise engine coolant temperature control and a leak-free OEM-equivalent fit. It is a direct replacement choice for Ford trucks and performance applications that need stable operating temperature and reliable warm-up behavior.

Compatible With select 2011-2025 Ford F-250 Super Duty, Ford F-350 Super Duty, Ford F-150, and Ford Mustang applications, this thermostat is engineered around OE-style dimensions and temperature settings for straightforward service.

Key Features

• OE Type Thermostat design for factory-style temperature regulation
• Start-to-open temperature: 194/201 degrees F, or 90/94 degrees C
• Reverse poppet design for controlled coolant flow
• Stainless steel, copper, and steel construction for durability
• O-ring seal type with one seal and one jiggle pin weep hole
• OE Performance comparison rating
• Part number 34240 for easy identification

Product Details

Gates OE Type Thermostats are built to match OEM-equivalent fit and temperature control requirements, helping the cooling system reach and maintain the correct operating range. The reverse poppet design and OE-style sealing surfaces support consistent coolant regulation, while the jiggle pin weep hole aids air bleeding during service. This thermostat is a practical replacement for Ford F-150, Ford F-250 Super Duty, Ford F-350 Super Duty, and Ford Mustang cooling system repairs where the original thermostat has worn out or begun to stick.

This part cross-references Continental 49240 and Motorad 717-200 for the same application.

Common Problems This Part Can Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuations during driving or towing
• Thermostat sticking open or sticking closed
• Coolant flow control issues that affect heater performance
• Leak concerns at the thermostat sealing surface

Installation Notes and Tips

• Verify the thermostat housing and sealing surfaces are clean before installation.
• Confirm the OE temperature rating matches the vehicle application before service.
• Use the included O-ring seal and inspect the cooling system for trapped air after installation.
• This thermostat does not include an installation tool.
• Some listed Ford F-250 Super Duty and Ford F-350 Super Duty applications exclude the housing, so reuse or replace the housing as required by the vehicle setup.

Quality Assurance

Gates designs this OE Type Thermostat for OEM-equivalent fit and precise temperature control. The 34240 part number is backed by Gates engineering standards for cooling system service on select Ford applications.