Gates 33983S Engine Coolant Thermostat

Gates Premium Thermostat 33983S Overview

The Gates Premium Thermostat 33983S is an engine coolant thermostat built for stable temperature control in a wide range of Toyota, Lexus, and Scion applications. It uses stainless steel and copper construction with an upgraded spring to help maintain consistent opening behavior under normal operating conditions.

For drivers searching for a 180 degree thermostat for Toyota Camry, Lexus ES350, or Scion tC applications, this premium thermostat is built to match OE temperature requirements while improving corrosion resistance.

Key Features

• Premium thermostat design with OE temperature operation at 180 degrees
• Heavy-gauge stainless steel and copper construction for improved corrosion resistance
• Upgraded spring for better temperature stability during normal operation
• Bottom by-pass design
• Jiggle pin weep hole included for air bleeding during service
• Sealing flange outside diameter: 2.21 in.
• Height: 2.75 in.; height between flanges: 1.74 in.
• By-pass flange diameter: 1.11 in.

Product Line Details

Gates Premium Thermostat parts are positioned for buyers who want an OE-style cooling system service part with upgraded materials. The Premium Thermostat line focuses on corrosion resistance and temperature stability, making it a practical choice for routine cooling system maintenance on vehicles such as the Toyota Camry, Toyota RAV4, Lexus RX350, and Scion xB.

Detailed Description

Part number 33983S is an engine coolant thermostat designed for broad coverage across many Toyota, Lexus, Scion, Pontiac, and Chevrolet applications. It is listed for numerous 1990-2018 vehicles, including Fits 1994-2014 Toyota Camry, N/A; Fits 2012-2018 Lexus ES350, N/A; and Fits 2011-2014 Scion tC, N/A. This part cross-references Dorman - HELP 46128 for the same application. If you are replacing a thermostat on a Toyota Highlander, Lexus RX400h, or Toyota Sienna, 33983S provides the correct 180 degree OE-temperature service point.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Temperature fluctuation during normal driving
• Corrosion-related thermostat housing and valve issues
• Cooling system service on high-mileage Toyota, Lexus, and Scion vehicles
• OE-temperature replacement needs for 180 degree applications

Installation Notes and Tips

Verify the thermostat design, flange dimensions, and OE temperature specification before installation. Clean the mating surfaces thoroughly and inspect the cooling system for contamination, old gasket material, or trapped air. The jiggle pin weep hole helps with air bleeding, but the cooling system should still be filled and bled according to the vehicle service procedure. Confirm the application against the exact year, make, and model before ordering, especially for Toyota Camry, Lexus ES330, and Scion xD fitments.

Quality Assurance

Gates manufactures this Premium Thermostat with stainless steel and copper materials and an upgraded spring to support consistent operation and corrosion resistance. Part number 33983S is built to OE-temperature requirements for the listed applications and is backed by Gates product engineering standards.