Stant 13778 Engine Coolant Thermostat

OE Type Thermostat for Broad Ford and Import Fitment

The Stant OE Type Thermostat, part number 13778, is an engine coolant thermostat built to match original equipment design requirements. It uses a durable stainless steel assembly for smooth operation and consistent coolant flow control, with a 180-degree opening temperature for applications that call for that specification.

Compatible With a wide range of Ford, Lincoln, Mercury, Jaguar, Saab, Mazda, Nissan, and other applications, this thermostat is a direct-fit style replacement for many high-mileage cooling system repairs. Stant 13778 is also listed as a replacement for part number 13398 in the applications shown.

Key Features

• OE Type Thermostat designed to follow original equipment dimensions and function
• 180 Degrees F opening temperature
• Stainless steel assembly for smooth performance
• Durable construction for long service life
• Bypass plate diameter: 1.09 in.
• Flange diameter without seal: 2.125 in.
• Height from flange to bottom: 1.36 in.
• Height from flange to top of bridge: 0.78 in.

Product Details

Stant 13778 is an OE Type Thermostat engineered for vehicles that require a 180-degree coolant temperature rating. The original equipment-style design helps maintain proper engine operating temperature, which is important for stable warm-up, heater performance, and cooling system regulation. This part number is listed across a broad range of applications, including Ford E-350 Super Duty, Ford F-150, Ford Explorer, Lincoln Navigator, and several Jaguar, Saab, and Kia models.

The Stant OE Type Thermostat line focuses on replacement parts that follow factory-style fitment and performance expectations. For buyers searching for a 180 degree thermostat for Ford F-150, a thermostat for Ford Explorer cooling system service, or a replacement thermostat for Lincoln Navigator and Mercury Grand Marquis applications, part number 13778 provides a direct OE-style option.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Slow warm-up after cold starts
• Unstable coolant temperature control
• Cooling system service on high-mileage Ford, Lincoln, Mercury, and import vehicles
• Replacement of a thermostat specified as part number 13398

Installation Notes and Tips

Verify the required opening temperature and housing dimensions before installation. Confirm the application against the vehicle’s cooling system specification, especially on models with multiple thermostat options. Inspect the thermostat housing, gasket sealing surfaces, and coolant condition during service, and bleed the cooling system according to the vehicle manufacturer’s procedure after installation.

Quality Assurance

Stant builds this thermostat with an OE-style design and stainless steel assembly to support consistent operation and long-term durability. The part is manufactured to meet the dimensional and temperature requirements listed for the applications shown.