Stant 14558 Engine Coolant Thermostat

Heavy-Duty Cooling Control

The Stant Heavy-Duty Thermostat 14558 is an engine coolant thermostat built for steady temperature regulation in demanding cooling systems. It opens at 180 degrees Fahrenheit and uses a stainless steel assembly for smooth operation, while the durable construction supports long service life in daily driving and work-use conditions.

Key Features

• Engine coolant thermostat with a 180 degrees Fahrenheit opening temperature
• Stainless steel assembly engineered for consistent, smooth movement
• Durable material construction for long-term cooling system service
• Flange diameter without seal: 1.35 in.
• Height from flange to bottom: 1.66 in.
• Height from flange to top of bridge: 1.52 in.
• Stant Heavy-Duty Thermostat line for demanding automotive cooling applications

Product Details

Stant Part Number 14558 is a heavy-duty engine coolant thermostat for vehicles that need stable coolant flow control at the specified opening temperature. In applications such as Ford F-150 and Chevrolet Silverado cooling system service, this thermostat helps maintain proper operating temperature by regulating coolant circulation through the engine. The stainless steel assembly and durable housing materials are selected for reliable performance in high-use environments. If you are replacing a worn thermostat in a Ford F-150 or Chevrolet Silverado, Part Number 14558 provides a direct-fit cooling system service part for the specified application.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation after startup
• Temperature fluctuation during stop-and-go driving
• Cooling system service on Ford F-150 and Chevrolet Silverado applications
• Replacement of a thermostat with inconsistent opening behavior

Installation Notes and Tips

Install the thermostat in the correct orientation for the engine housing and verify the flange dimensions before assembly. Inspect the thermostat housing, gasket surface, and coolant condition during service, and refill the cooling system with the proper coolant mixture after installation. Confirm the 180 degrees Fahrenheit rating and application match the vehicle’s original specification before final assembly.

Quality Assurance

Stant’s Heavy-Duty Thermostat line uses durable materials and a stainless steel assembly to support smooth, dependable operation in automotive cooling systems.