Part #: 3891

CSF 3891 Radiator

⚙️ 6 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Nissan, Altima
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🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF Radiator for Nissan Altima

The CSF radiator part number 3891 is designed specifically for Nissan Altima models, providing reliable cooling performance. Featuring a durable aluminum core and plastic tanks, this radiator supports efficient heat dissipation to maintain optimal engine temperature.

  • Core thickness: 1 1/4 inches
  • Core width: 15 5/8 inches
  • Core length: 28 3/8 inches
  • Aluminum core material with plastic tanks
  • Cross flow design for effective coolant circulation
  • Inlet and outlet diameter: 1 3/8 inches (right inlet, left outlet)
  • Single-row radiator core
  • Includes high-efficiency plate type oil cooler (10 7/16 inches)

Detailed Product Description

The CSF 3891 radiator is engineered with an aluminum core that measures 1 1/4 inches thick, 15 5/8 inches wide, and 28 3/8 inches long, ensuring sufficient surface area for heat exchange. The plastic tanks are designed to match OEM specifications, providing a balance of durability and weight savings. This radiator features a cross flow design, which promotes efficient coolant flow from the right-side inlet to the left-side outlet, both measuring 1 3/8 inches in diameter. The single-row core construction supports consistent cooling performance, while the integrated high-efficiency plate type oil cooler enhances engine oil temperature regulation.

Compatible Vehicles and Applications

  • Compatible with Nissan Altima models requiring a cross flow radiator
  • Replaces OEM radiators with plastic tanks and aluminum cores
  • Suitable for vehicles experiencing overheating or coolant leaks
  • Ideal for restoring factory cooling system performance

Installation Notes and Tips

When installing the CSF radiator 3891, ensure all coolant hoses match the 1 3/8 inch inlet and outlet diameters. Verify the radiator core dimensions fit within the engine bay, especially the 28 3/8 inch length and 15 5/8 inch width. Since the radiator does not include a cap, reuse the existing OEM cap or source a compatible replacement. Properly bleed the cooling system after installation to prevent air pockets and ensure optimal coolant flow.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards, using high-quality aluminum cores and plastic tanks for durability and corrosion resistance. This radiator is free of hazardous materials and designed for long-term service. While specific warranty details are not provided, CSF products typically come with manufacturer-backed quality assurance to support reliable operation in Nissan Altima vehicles.

BrandCSF
Part Number3891
Core Thickness1 1/4
Core Width15 5/8
Core MaterialAluminum
Tank MaterialPlastic
Core Length28 3/8
Inlet Diameter1 3/8 right
Outlet Diameter1 3/8 left
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)6 1/4
Box Length (in)37 9/16
Box Weight (lbs)12
Box Width (in)24 15/16
Hazardous MaterialNo
Inlet Length (in)16 1/8
Inlet Width (in)1 5/8
Oil Cooler (in)10 7/16 (high-efficiency plate type)
Outlet Length (in)16 1/8
Outlet Width (in)1 5/8
Tech NoteO.e.m. style plastic tank & aluminum core.

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2024NissanAltima2.0LL4N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2023NissanAltima2.0LL4N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2022NissanAltima2.0LL4N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2021NissanAltima2.0LL4N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2020NissanAltima2.0LL4N/AUpgraded Heavy Duty Core. 11% Thicker 30mm vs OEM 27mm
2019NissanAltima2.0LL4N/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:

1385821460-6CB0A21460-6CB0B21460-6CB0CNI3010249

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