Part #: 3872

CSF 3872 Radiator

⚙️ 5 vehicles fit this part
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Select your vehicle to confirm fitment
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Kia, Optima
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Radiator Replacement for Kia Optima

The CSF radiator part number 3872 is designed specifically for Kia Optima models, providing efficient engine cooling with durable construction. This radiator features a cross flow design and OEM-style plastic tanks paired with an aluminum core to ensure consistent performance.

  • Core thickness: 7/8 inch for effective heat dissipation
  • Core dimensions: 18 5/16 inches width and length
  • Aluminum core material for lightweight durability
  • Plastic tank construction with quick-connect outlets
  • Inlet and outlet diameters: 1 3/8 inches positioned left and right respectively
  • Single-row radiator core for optimized cooling flow
  • Includes a high-efficiency plate type oil cooler measuring 14 9/16 inches

Detailed Radiator Specifications and Design

The CSF 3872 radiator is engineered with a 7/8 inch thick aluminum core that measures 18 5/16 inches in both width and length, providing a balanced surface area for heat exchange. The plastic tanks are designed in an OEM style, ensuring compatibility and ease of installation on Kia Optima vehicles. The cross flow configuration allows coolant to move horizontally through the core, improving thermal efficiency. Both the inlet and outlet have a diameter of 1 3/8 inches, positioned on the left and right sides respectively, facilitating proper coolant circulation. Additionally, the radiator includes a 14 9/16 inch high-efficiency plate type oil cooler, enhancing engine cooling performance under demanding conditions.

Applications and Common Issues Addressed

  • Replacement for leaking or cracked radiator tanks
  • Solves overheating problems due to clogged or damaged cores
  • Restores proper coolant flow in Kia Optima cooling systems
  • Addresses reduced cooling efficiency from corrosion or wear
  • Supports engine temperature regulation during high load or hot weather

Installation Notes and Tips

When installing the CSF radiator 3872 on a Kia Optima, ensure the inlet and outlet connections align with the vehicle’s coolant hoses for a secure fit. The OEM-style plastic tanks and aluminum core are designed for direct replacement, but verify hose diameters and lengths before installation. Since the radiator does not include a cap, reuse the existing cap or source a compatible replacement. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal performance.

Quality Assurance and Warranty Information

CSF radiators are manufactured to meet OEM specifications, using corrosion-resistant aluminum cores and durable plastic tanks. This radiator is free from hazardous materials and weighs approximately 9 pounds, ensuring ease of handling. While specific warranty details are not provided, CSF products typically adhere to industry standards for quality and reliability.

BrandCSF
Part Number3872
Core Thickness7/8
Core Width18 5/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length18 5/16
Inlet Diameter1 3/8 left
Outlet Diameter1 3/8 right
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)6 5/8
Box Length (in)26 1/8
Box Weight (lbs)9
Box Width (in)23 3/4
Hazardous MaterialNo
Inlet Length (in)19
Inlet Width (in)1 9/16
Oil Cooler (in)14 9/16 (high-efficiency plate type)
Outlet Length (in)19
Outlet Width (in)1 9/16
Tech NoteO.e.m. style plastic tanks & aluminum core with quick-connect out

This part fits 5 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2020KiaOptima2.0LL4N/AOE style design ensures optimal fitment and performance.
2019KiaOptima2.0LL4N/AOE style design ensures optimal fitment and performance.
2018KiaOptima2.0LL4N/AOE style design ensures optimal fitment and performance.
2017KiaOptima2.0LL4N/AOE style design ensures optimal fitment and performance.
2016KiaOptima2.0LL4N/AOE style design ensures optimal fitment and performance.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1360425310C1250KI3010165

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.