Motorad 378-192 Engine Coolant Thermostat

Motorad 378-192 Engine Coolant Thermostat

The Motorad 378-192 is a standard engine coolant thermostat built to OE specifications for Ford cooling systems that call for a 192°F opening temperature. It uses OEM-quality materials, a copper case, and a wax compound for responsive temperature control in demanding service conditions.

Compatible With select Ford E-350, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty applications, this thermostat is a direct-fit cooling system service part for vehicles that require a 192°F OE-specified thermostat.

Key Features

• Start-to-open temperature: 192°F for OE-specified cooling control
• Copper case and wax compound for quick reaction to coolant temperature changes
• Standard thermostat design for factory-style replacement
• Jiggle pin weep hole included for air relief during service
• Offset design and OEM-style sealing features where applicable
• Motorad Standard line part number 378-192

Detailed Description

Motorad Standard 378-192 is engineered as an OE-style engine coolant thermostat for Ford trucks and vans that use a 192-degree thermostat specification. The thermostat’s copper case and wax element are selected to maintain consistent opening behavior as coolant temperature rises, helping the engine reach and hold its intended operating range. With a sealing flange outside diameter of 2.52 in, bypass diameter of 1.38 in, and bypass length of 1.78 in, it is built around the dimensions needed for proper housing fitment. The jiggle pin weep hole helps purge trapped air during installation and refill. This part cross-references Four Seasons 37819 for the same application.

What It Helps Address

• Engine running cooler or warmer than specified
• Delayed coolant circulation after cold start
• Temperature fluctuation from a worn thermostat
• Cooling system service on Ford E-350 and Super Duty platforms
• Replacement of a thermostat that no longer opens at 192°F

Installation Notes and Tips

Install the thermostat in the correct orientation for the housing and coolant bypass layout. Verify the sealing surfaces are clean and inspect the housing before assembly. Because no gasket or seal is included, reuse only if serviceable or replace with the correct seal for the application. Bleed air from the cooling system after refill so the jiggle pin weep hole can assist with air relief. Confirm the vehicle requires a 192°F thermostat before installation.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and OE-supplier production standards. It is built to OEM specifications and processes for Ford cooling system service, including 2003-2004 Ford E-350 Club Wagon, 1999-2003 Ford E-350 Super Duty, 2000-2003 Ford Excursion, 1999-2003 Ford F-250 Super Duty, and 1999-2003 Ford F-350 Super Duty applications.