Gates 34021 Engine Coolant Thermostat

OE Exact Thermostat for Hyundai and Kia

Gates OE Exact Thermostat 34021 is an engine coolant thermostat built to match OEM fit, function, and design. It uses a steel and copper construction with an O-ring seal and a jiggle pin weep hole for controlled coolant flow and air bleeding during service.

Compatible with a wide range of Hyundai and Kia applications, including Hyundai Elantra, Tucson, Sonata, Accent, Tiburon, and Kia Optima, Sportage, Sorento, Soul, Forte, and Rio models. This 180-degree thermostat is a direct replacement choice for drivers looking for OE-style temperature control.

Key Features

• Gates OE Exact Thermostat line for OEM-style replacement fit and function
• 180°F / 82°C start-to-open temperature
• Bottom by-pass design
• Steel and copper construction
• O-ring seal type for a secure coolant seal
• Jiggle pin weep hole for air purge during cooling system service
• Sealing flange outside diameter: 2.13 in.
• Height between flanges: 1.5 in.

Detailed Description

Gates part number 34021 is engineered as an OE Exact Thermostat for customers who want the same thermostat fit, function, and design as the original component. The thermostat opens at 180°F, helping regulate engine coolant temperature in vehicles that require OE-temperature control. Its bottom by-pass layout, steel and copper materials, and O-ring seal support proper cooling system operation in the specified Hyundai and Kia applications. This part cross-references Stant 48588 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed warm-up after cold starts
• Temperature fluctuation from a sticking thermostat
• Coolant flow control issues in OE-temperature applications
• Cooling system service on Hyundai Elantra, Tucson, Sonata, Accent, and Kia Optima, Sportage, Sorento, Soul, Forte, and Rio models

Installation Notes and Tips

Verify the OE temperature rating and housing style before installation. Clean the sealing surfaces thoroughly, replace the O-ring seal as required by the application, and confirm correct coolant fill and air bleeding after service. The jiggle pin weep hole should be oriented according to the vehicle service procedure to help purge trapped air.

Quality Assurance

Gates designs the OE Exact Thermostat line to match OEM product fit, function, and design for direct replacement use in the listed Hyundai and Kia applications. Part number 34021 is built for consistent OE-style cooling system performance.