Motorad 5655-188 Engine Coolant Thermostat

Overview

The Motorad UltraStat engine coolant thermostat, part number 5655-188, is an OEM-style replacement built with stainless steel construction for corrosion resistance and long service life. It is engineered for a broad range of Ford and Lincoln applications, including Ford F-150, Ford Explorer, and Lincoln Aviator models.

This thermostat uses BLVT valve technology to reduce thermal shock in the cooling system and includes a jiggle pin weep hole for improved air bleeding during service. The 5655-188 is a direct-fit cooling system component for drivers replacing a worn thermostat in Ford and Lincoln vehicles.

Key Features

• Stainless steel construction for durability and corrosion resistance
• OEM design and OEM grade type for factory-style fitment
• BLVT valve technology helps minimize thermal shock
• Jiggle pin weep hole supports air purge during cooling system service
• Starts to open at 187°F for regulated coolant flow
• Motorad UltraStat line for cooling system replacement applications

Detailed Description

Motorad part number 5655-188 is an UltraStat engine coolant thermostat designed for direct replacement in a wide range of Ford and Lincoln vehicles. Fitment includes 2011-2023 Ford F-150, 2020-2023 Ford Explorer, 2020-2023 Lincoln Aviator, and other listed applications such as Ford Edge, Ford Mustang, Ford Transit models, Lincoln Nautilus, and Lincoln Navigator. The stainless steel body and OEM-style design support consistent coolant regulation, while the 187°F opening temperature helps maintain proper engine operating temperature.

The UltraStat product line focuses on thermostat construction and flow control. BLVT valve technology is used to reduce abrupt temperature changes in the cooling system, and the jiggle pin weep hole assists with trapped air removal during installation and service. Part number 5655-188 is also referenced as Motorad 5655-188.

What It Helps Address

• Engine running too cool or too hot due to thermostat wear
• Delayed coolant flow regulation after thermostat failure
• Cooling system temperature swings caused by a sticking valve
• Corrosion-related thermostat deterioration
• Air trapped in the cooling system after service

Installation Notes

Use a new gasket or seal, since one is required and not included. Verify the thermostat orientation and sealing surfaces before installation, and confirm the cooling system is properly filled and bled after service. This part number 5655-188 is listed for multiple Ford and Lincoln models, so match the vehicle application and cooling system specifications before ordering.

Quality Assurance

Motorad UltraStat thermostats are built with heavy-gauge stainless steel construction and OEM-style engineering for cooling system service. The part number 5655-188 is manufactured for direct replacement use in the listed Ford and Lincoln applications.