Gates 33658 Engine Coolant Thermostat Seal

Thermostat Seal for Honda, Acura, and More

The Gates 33658 thermostat seal is built to sit securely around the thermostat valve and help maintain a tight coolant seal. It is a practical replacement for a wide range of Honda, Acura, Toyota, Lexus, Nissan, and other import applications that use this style of thermostat seal.

Gates Green Stripe Heavy-Duty Thermostat Seals are part of the Thermostat Seal line, focused on secure fitment around the thermostat valve to reduce leakage at the cooling system connection. The 33658 part number is commonly searched for Honda Odyssey thermostat seal, Acura TL thermostat seal, and Toyota Tundra thermostat seal applications.

• Inside diameter: 2.38 in.
• Outside diameter: 2.68 in.
• Height: 0.21 in.
• Grooved, molded style for a secure seal profile
• Engine coolant thermostat seal for cooling system service
• Cross-reference: FEL-PRO 35162

Detailed Product Overview

This Gates thermostat seal is engineered for use where the thermostat valve requires a precise sealing ring to help control coolant flow without leakage. Its molded, grooved construction supports a consistent fit around the thermostat assembly, making it a direct-service part for cooling system maintenance on many import vehicles. The Gates 33658 is a useful match for owners searching for a thermostat seal for 2001-2015 Honda Accord, 2001-2013 Acura MDX, or 2000-2009 Toyota Tundra.

What This Part Helps Address

• Coolant seepage at the thermostat valve
• Loss of sealing integrity during thermostat service
• Cooling system leaks traced to a worn thermostat seal
• Improper sealing after thermostat replacement
• Maintenance on vehicles with a thermostat seal at the water pump inlet system

Installation Notes and Tips

Verify the thermostat seal dimensions against the original part before installation. Clean the sealing surfaces thoroughly, inspect the thermostat housing and valve area for damage, and confirm the seal seats evenly before reassembly. This part is listed for a broad range of vehicles, including Fits 1999-2017 Honda Odyssey, Fits 2001-2015 Honda Accord, Fits 2003-2015 Honda Pilot, Fits 1995-2014 Acura TL, and Fits 2000-2009 Toyota Tundra.

• Fits 1999-2017 Honda Odyssey, N/A
• Fits 2001-2015 Honda Accord, N/A
• Fits 2003-2015 Honda Pilot, N/A
• Fits 1995-2014 Acura TL, N/A
• Fits 2001-2013 Acura MDX, N/A
• Fits 2000-2009 Toyota Tundra, N/A
• Fits 2003-2009 Lexus GX470, N/A
• Fits 2004-2010 Nissan TITAN, N/A

Quality Assurance

Gates is a recognized aftermarket brand with a dedicated Thermostat Seal product line, and this seal is built to match the dimensional requirements listed for the application. Part number 33658 is also referenced by multiple interchange numbers for the same use case, including FEL-PRO 35162.