Elring 394.090 Engine Coolant Thermostat Gasket

Elring 394.090 Engine Coolant Thermostat Gasket

Elring 394.090 is an engine coolant thermostat gasket made from NBR (nitrile butadiene rubber) for a precise seal in the cooling system. With a 46.5 mm inside diameter, 55.3 mm outer diameter, and 4.5 mm thickness, it is sized for select Saab and Volvo applications that require accurate thermostat sealing.

Key Features

• Material: NBR (nitrile butadiene rubber) for coolant-system sealing
• Inside diameter: 46.5 mm
• Outer diameter: 55.3 mm
• Thickness: 4.5 mm
• Engine coolant thermostat gasket for select Saab and Volvo vehicles
• Elring part number 394.090 for direct reference and ordering

Detailed Description

This Elring thermostat gasket is built to match the sealing dimensions used in a wide range of Volvo and Saab cooling system applications, including Saab 9-5, Saab 9-3, Volvo S60, Volvo V70, Volvo S80, Volvo 850, Volvo 940, Volvo 240, and related models. The NBR rubber construction is selected for coolant exposure and dimensional stability, helping the thermostat housing maintain a consistent seal under normal operating temperatures. If you are replacing a thermostat gasket on a Volvo V70 or Saab 9-5, Elring 394.090 provides the specified fitment and dimensions needed for the job.

This part cross-references MAHLE C31992 for the same application.

What It Is Used For

• Replacing a leaking thermostat housing seal
• Restoring proper coolant containment at the thermostat assembly
• Addressing coolant odor or visible seepage around the thermostat area
• Correcting sealing issues after thermostat service on Saab and Volvo engines
• Maintaining a secure gasket interface during cooling system repair

Installation Notes and Tips

Confirm the thermostat housing dimensions before installation and compare them to the listed 46.5 mm inside diameter, 55.3 mm outer diameter, and 4.5 mm thickness. Clean the mating surfaces thoroughly, remove old gasket residue, and inspect the housing for warpage or corrosion before fitting the new seal. For best results, verify vehicle application by year and model, especially on Saab 900, Saab 9000, Volvo S40, Volvo S70, Volvo S90, and Volvo V90 applications listed in the fitment data.

Quality Assurance

Elring is a recognized sealing-system manufacturer, and this gasket is produced to support accurate fitment in confirmed Saab and Volvo applications. Part number 394.090 is listed with expanded fitment coverage across 1979-2009 model years, including Saab 900, Saab 9000, Saab 9-3, Saab 9-5, Volvo 240, Volvo 740, Volvo 760, Volvo 780, Volvo 850, Volvo 940, Volvo 960, Volvo S40, Volvo S60, Volvo S70, Volvo S80, Volvo S90, Volvo V40, Volvo V70, and Volvo V90.