Description

25620-2G510 CASE-THERMOSTAT: Technical Guide

Reliable Temperature Control | Sonata, Santa Fe & Optima 2.4L

The 25620-2G510 CASE-THERMOSTAT is the essential engine component designed to restore the cooling integrity of your Hyundai or Kia 2.4L engine. This unit ensures maximum coolant flow efficiency and superior structural integrity.

Vehicle Compatibility

  • Hyundai Sonata: 2.4L (2011-2014)
  • Hyundai Santa Fe: 2.4L Models
  • Kia Optima: 2.4L (2011-2015)
  • Engine Series: Theta II GDI/MPI
  • Part Number: 25620-2G510

25620-2G510 CASE-THERMOSTAT Specs

  • Type: Thermostat Case Assembly
  • Material: High-Durability Alloy/Composite
  • Configuration: Housing Only
  • Location: Engine Block Outlet
  • Standard: OE Precision Grade

Drivetrain Maintenance Benefits

Choosing the correct replacement part is vital for preventing engine failure due to sudden thermal spikes. Using a premium 25620-2G510 CASE-THERMOSTAT ensures that your engine receives a steady supply of coolant. We strongly recommend browsing our Cooling System Components and Engine Spares to ensure a complete and professional vehicle service.

Confirm Professional Fitment

To ensure this thermostat housing is the perfect fit for your specific vehicle, please contact us for professional verification using your chassis number.


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Note: Original manufacturer part numbers are for identification and compatibility reference purposes only.

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Questions and Answers

What is the primary function of this housing assembly?
It serves as the protective enclosure for the thermostat, providing a secure, leak-proof junction for the main coolant hoses.
Which vehicles utilize the 25620-2G510 CASE-THERMOSTAT?
It is a standard fitment for the 2.4L Theta II engines found in the Hyundai Sonata (YF), Hyundai Santa Fe (DM), and Kia Optima (TF).
What are the signs of a failing thermostat case?
Common symptoms include coolant pooling around the engine block, persistent "Low Coolant" warnings, or white residue (dried antifreeze) near the housing seams.
Is this component a direct replacement for the original part?
Absolutely. This unit is manufactured to meet exact OE dimensional standards, ensuring the mounting bolt holes and hose diameters align perfectly.
Why should I replace the case instead of just the gasket?
Over time, heat cycles can cause the 25620-2G510 CASE-THERMOSTAT to develop hairline cracks or surface warping that a new gasket cannot seal, making a full replacement the most professional repair.

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