Part #: 3861

CSF 3861 Radiator

1 Row Plastic Tank Aluminum Core
⚙️ 1 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$115.20Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦1 Row Plastic Tank Aluminum Core
🚗Fitment: Toyota, RAV4
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF 3861 Radiator for Toyota RAV4

The CSF 3861 radiator is designed specifically for Toyota RAV4 models, providing reliable cooling performance with a durable aluminum core and plastic tanks. This radiator features a single-row core construction optimized for efficient heat dissipation in cross flow configuration.

  • Core thickness: 7/8 inch
  • Core width: 15 7/8 inches
  • Core length: 26 3/8 inches
  • Aluminum core with plastic tanks
  • Cross flow design for improved coolant flow
  • Inlet and outlet diameter: 1 1/2 inches (left inlet, right outlet)
  • Includes high-efficiency plate type oil cooler (10 13/16 inches)
  • OEM style plastic tanks and aluminum core construction

Detailed Product Description

The CSF 3861 radiator is part of the 1 Row Plastic Tank Aluminum Core product line, which combines lightweight plastic tanks with a robust aluminum core to balance durability and heat transfer efficiency. The single-row core with a thickness of 7/8 inch and cross flow design ensures effective cooling by allowing coolant to flow horizontally through the radiator. The core dimensions of 15 7/8 inches in width and 26 3/8 inches in length provide ample surface area for heat exchange. The radiator features a 1 1/2 inch diameter inlet on the left and outlet on the right, both with lengths of 16 9/16 inches and widths of 1 3/8 inches, facilitating proper hose connections. Additionally, the integrated high-efficiency plate type oil cooler (10 13/16 inches) supports engine oil temperature regulation, enhancing overall engine performance.

Compatible Vehicles and Applications

  • Compatible with Toyota RAV4 models requiring a 1-row radiator
  • Designed to replace OEM radiators with plastic tanks and aluminum cores
  • Suitable for addressing cooling system issues such as overheating and coolant leaks
  • Ideal for vehicles experiencing reduced cooling efficiency or radiator core damage

Installation Notes and Tips

  • Ensure compatibility with your Toyota RAV4 model year before installation
  • Inspect and replace radiator hoses and clamps as needed during installation
  • Bleed the cooling system properly to avoid air pockets after installation
  • Verify inlet and outlet hose alignment with the 1 1/2 inch diameter fittings
  • Follow manufacturer torque specifications for mounting hardware

Quality Assurance and Warranty

The CSF 3861 radiator is manufactured to meet OEM specifications, featuring a durable aluminum core and plastic tanks designed for long-term use. This radiator does not include a cap and is free from hazardous materials. While specific warranty details are not provided, CSF products typically adhere to industry standards for quality and reliability.

BrandCSF
Part Number3861
Position1 Row Plastic Tank Aluminum Core
Box Height (in)4 7/8
Box Length (in)32 7/16
Box Weight (lbs)9
Box Width (in)19 1/4
Cap IncludedNo
Core Length26 3/8
Core MaterialAluminum
Core Thickness7/8
Core Width15 7/8
Down Flow Or Cross Flow TypeCross Flow
Hazardous MaterialNo
Inlet Diameter1 1/2 Left
Inlet Length (in)16 9/16
Inlet Width (in)1 3/8
Oil Cooler (in)10 13/16 (high-efficiency Plate Type)
Outlet Diameter1 1/2 Right
Outlet Length (in)16 9/16
Outlet Width (in)1 3/8
Radiator Core Row Quantity1
Tank MaterialPlastic
Tech NoteO.E.M. style Plastic tanks & Aluminum core.

This part fits 1 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2018ToyotaRAV42.5LL4N/ANorth America Built; w/ Tow Package; 1 Row Plastic Tank Aluminum Core

* 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:

1368516400-28591CU13685TO3010362

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