Stant 14598 Engine Coolant Thermostat / Water Outlet Assembly

Integrated Thermostat Housing for Mercedes-Benz

Stant Part Number 14598 is an engine coolant thermostat and water outlet assembly built for select Mercedes-Benz applications. It combines the thermostat into the housing to streamline service and uses durable construction for long service life.

This integrated thermostat housing is specified at 176 degrees Fahrenheit and is listed for 1992-1999 Mercedes-Benz models including S420, S500, SL500, E420, E500, 400E, 400SE, 400SEL, 500E, 500SEC, 500SEL, and 500SL. The Stant Integrated Thermostat Housing line is focused on direct-fit cooling system service parts that simplify replacement of the thermostat housing assembly.

Key Features

• Integrated thermostat and housing assembly for simplified cooling system service
• 176 degree Fahrenheit thermostat specification
• Durable housing material for long service life
• Seal included for the listed application
• Bypass plate diameter: 1.15 in.
• Flange diameter with seal: 2.9 in.
• Flange diameter without seal: 3.65 in.
• Height from flange to bottom: 3.6 in.

Detailed Description

Stant 14598 is an integrated thermostat housing assembly for Mercedes-Benz cooling systems where the thermostat and water outlet are serviced together. The 176 degree thermostat setting matches the OE temperature noted in the fitment data, making it a direct replacement choice for maintaining proper engine coolant flow and operating temperature. This part number 14598 is listed for multiple Mercedes-Benz V8 and performance applications, including S420 and S500 sedans, SL500 roadsters, and E420/E500 models.

The integrated design reduces the number of separate components to handle during service and helps restore the original thermostat housing configuration. If you are replacing a worn Mercedes-Benz thermostat housing, coolant outlet, or thermostat assembly, Stant 14598 provides the correct temperature rating and housing dimensions for the listed vehicles.

What It Helps Address

• Coolant leaks at the thermostat housing or water outlet
• Incorrect engine operating temperature from a worn thermostat
• Delayed coolant circulation after thermostat failure
• Cracked or deteriorated housing material
• Service time associated with separate thermostat and housing replacement

Installation Notes and Tips

Verify engine code and housing style before ordering, since the fitment notes specify a second design for the listed Mercedes-Benz applications. Inspect the sealing surface, coolant hoses, and mating components before installation, and confirm the bypass plate and flange dimensions match the original part. Proper coolant refill and bleeding are important after installation to help prevent air pockets in the cooling system.

Compatible With 1992-1993 Mercedes-Benz 400E, 400SE, 500E, 500SEL, 500SL; 1993 Mercedes-Benz 400SEL, 500SEC; 1994-1995 Mercedes-Benz E420; 1994 Mercedes-Benz E500; 1994-1998 Mercedes-Benz SL500; 1994-1999 Mercedes-Benz S420, S500; 1997 Mercedes-Benz E420. Part Number 14598 is also referenced in the Stant Integrated Thermostat Housing line for these applications.

Quality Assurance

Stant manufactures this thermostat housing assembly with durable materials and an integrated design intended to support reliable cooling system service on the listed Mercedes-Benz applications. The OE temperature specification and application notes help confirm correct replacement selection for the vehicles shown.