Fel-Pro 35734 Engine Coolant Thermostat Seal

Fel-Pro 35734 Engine Coolant Thermostat Seal

Fel-Pro 35734 is an engine coolant thermostat seal built for direct sealing performance in Honda and Acura cooling system applications. It uses application-specific materials and dimensions to support a precise fit where the thermostat housing meets the engine coolant passage.

• Inside diameter: 1.760 in. / 44.7 mm
• Thickness: 0.215 in. / 5.4 mm
• Premium grade sealing component
• Mounting hole quantity: 0
• Engine coolant thermostat seal for cooling system service

Fitment Coverage

• Fits 2016-2022 Honda HR-V, N/A
• Fits 2013-2015 Acura ILX, N/A
• Fits 2001-2015 Honda Civic, N/A
• Fits 2007-2008 Honda Fit, N/A
• Fits 2001-2005 Acura EL, N/A

Detailed Description

Fel-Pro 35734 is a premium thermostat seal for cooling system repairs where a reliable gasket-style seal is needed to maintain proper coolant containment. The seal dimensions are specified for the application, with a 1.760-inch inside diameter and 0.215-inch thickness, helping support correct seating in the thermostat housing. This part is used in select Honda Civic, Honda Fit, Honda HR-V, Acura ILX, and Acura EL applications, including 2001-2015 Honda Civic thermostat seal service and 2016-2022 Honda HR-V cooling system repair.

This part cross-references MAHLE C31848 and C31849 for the same application.

Common Repair Uses

• Coolant seepage at the thermostat housing
• Sealing issues after thermostat replacement
• Maintenance on aging cooling system gaskets
• Leak repair in Honda Civic and Honda Fit cooling service
• Thermostat housing reseal on Acura ILX and Acura EL applications

Installation Notes and Tips

Inspect the thermostat housing and mating surfaces before installation. Remove old seal material, clean the sealing surfaces thoroughly, and verify the seal seats evenly before reassembly. Use the correct coolant service procedure for the vehicle and confirm there are no leaks after the system is refilled and bled.

Quality Assurance

Fel-Pro gaskets are built with application-specific materials and sealing technology focused on vehicle sealing performance. The brand positions this part line for professional-level durability and fit in cooling system sealing applications.