Gates 33340S Engine Coolant Thermostat

Gates Premium Thermostat for Honda Cooling Systems

The Gates Premium Thermostat 33340S is an engine coolant thermostat built for stable temperature control in a wide range of Honda, Acura, Isuzu, and Toyota applications. It uses stainless steel and copper construction with an upgraded spring to support consistent opening behavior and improved corrosion resistance.

For drivers searching for a 170 degree thermostat for Honda Civic, Honda CR-V, or Honda Fit applications, this Gates Premium Thermostat 33340S offers an OE-style solution with fitment coverage across multiple model years.

Key Features

• Heavy-gauge stainless steel and copper construction
• 170 degree start-to-open temperature
• Offset bottom by-pass design
• Jiggle pin weep hole for air bleeding during service
• Upgraded spring for temperature stability under normal operation
• By-pass flange diameter: 1.14 in.
• Sealing flange outside diameter: 2.05 in.
• Height: 2.22 in.; height between flanges: 1.38 in.

Product Details

Gates Premium Thermostat line focuses on durable thermostat construction for everyday cooling-system service. The stainless steel body helps resist corrosion, while the copper material and spring design support reliable thermal response. Part number 33340S is a 170 degree thermostat used in both OE-temperature and alternate-temperature applications, depending on the vehicle listing. This part cross-references Stant 45877 for the same application.

Compatible With Honda Civic, Honda Accord, Honda CR-V, Honda Fit, Acura Integra, Acura EL, Acura CL, Honda Odyssey, Honda Prelude, Honda CRX, Honda City, Honda Insight, Honda Civic del Sol, Isuzu Axiom, and Toyota Pickup applications listed in the fitment data.

Common Cooling Issues This Part Can Address

• Engine running hotter than normal due to a thermostat that no longer opens at the correct temperature
• Slow warm-up or unstable coolant temperature from worn internal spring components
• Corrosion-related thermostat wear in older cooling systems
• Temperature fluctuation during stop-and-go driving
• Service replacement for a failed Honda thermostat housing application

Installation Notes

• Verify the vehicle’s required thermostat temperature before installation; this part is listed for 170 degree OE and alternate-temperature applications.
• Inspect the thermostat housing, sealing surfaces, and coolant condition before reassembly.
• Use the jiggle pin weep hole orientation recommended by the vehicle service procedure.
• Bleed air from the cooling system after installation to help prevent hot spots and temperature spikes.
• Confirm fitment by year, make, and model before ordering; Gates 33340S is listed for multiple Honda Civic, Honda CR-V, and Honda Fit applications.

Quality Assurance

Gates manufactures this Premium Thermostat with corrosion-resistant materials and an upgraded spring design to support consistent operation under normal driving conditions. The part number 33340S is built as a premium replacement thermostat for service work where stable coolant control matters.