Part #: 3391

CSF 3391 Radiator

1 Row Plastic Tank Aluminum Core
⚙️ 3 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
📦1 Row Plastic Tank Aluminum Core
🚗Fitment: Subaru, Forester
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF 3391 Radiator for Subaru Forester

The CSF 3391 radiator is designed specifically for Subaru Forester models, providing reliable engine cooling with a durable aluminum core and plastic tanks. This radiator features a single-row core construction optimized for efficient heat dissipation in a down flow configuration.

  • Core thickness: 5/8 inch
  • Core width: 27 inches
  • Core length: 14 3/16 inches
  • Aluminum core material with plastic tanks
  • Inlet diameter: 1 1/2 inch (right side)
  • Outlet diameter: 1 9/16 inch (left side)
  • Down flow radiator type
  • One core row for streamlined cooling
  • Cap not included (CSF cap number 4540 compatible)
  • Box dimensions: 30 5/8" L x 21 15/16" W x 5 1/16" H
  • Box weight: 10 lbs

Details on the 1 Row Plastic Tank Aluminum Core Product Line

The CSF 1 Row Plastic Tank Aluminum Core line combines OEM-style plastic tanks with a robust aluminum core to balance durability and weight. This product line is engineered to meet the cooling demands of vehicles like the Subaru Forester, offering a single-row core design that supports effective heat exchange while maintaining a compact form factor.

Product Description and Specifications

The CSF 3391 radiator features a 5/8 inch thick aluminum core measuring 27 inches wide and 14 3/16 inches long, designed for optimal cooling performance in Subaru Forester vehicles. The plastic tanks are engineered to OEM specifications, ensuring proper fit and function. The radiator uses a down flow design, which directs coolant downward through the core for efficient heat transfer. Inlet and outlet diameters are 1 1/2 inches (right) and 1 9/16 inches (left), respectively, matching factory hose connections. This radiator does not include a cap but is compatible with CSF cap number 4540. The unit weighs approximately 10 pounds and ships in a box sized 30 5/8 by 21 15/16 by 5 1/16 inches.

Common Applications and Problem Resolution

  • Replacement for leaking or cracked Subaru Forester radiators
  • Solves overheating issues caused by clogged or damaged cores
  • Restores proper coolant flow with OEM-style inlet and outlet sizes
  • Addresses radiator core corrosion or physical damage
  • Improves cooling efficiency in Forester models with single-row radiator setups

Installation Notes and Tips

  • Ensure compatibility with Subaru Forester model year before installation
  • Use compatible CSF radiator cap number 4540 (not included)
  • Inspect hoses and clamps for wear during installation
  • Flush cooling system to remove debris before installing new radiator
  • Follow vehicle manufacturer torque specifications for mounting hardware

Quality Assurance and Warranty Information

The CSF 3391 radiator is manufactured to meet OEM standards, combining a high-quality aluminum core with durable plastic tanks. This product is free of hazardous materials and designed for long-term reliability. Warranty details should be confirmed with the distributor or manufacturer, as they may vary by region.

BrandCSF
Part Number3391
Position1 Row Plastic Tank Aluminum Core
Box Height (in)5 1/16
Box Length (in)30 5/8
Box Weight (lbs)10
Box Width (in)21 15/16
Cap IncludedNo
Core Length14 3/16
Core MaterialAluminum
Core Thickness5/8
Core Width27
Csf Cap Number4540
Down Flow Or Cross Flow TypeDown Flow
Hazardous MaterialNo
Inlet Diameter1 1/2 Right
Inlet Length (in)27 13/16
Inlet Width (in)1 5/8
Oil Cooler (in)14 3/4 (high-effeciency Concentric Type)
Outlet Diameter1 9/16 Left
Outlet Length (in)27 13/16
Outlet Width (in)2
Radiator Core Row Quantity1
Tank MaterialPlastic
Tech NoteO.E.M. style Plastic tanks & Aluminum core;Manufactured with steel crimp strips to strengthen Radiator by 40% over O.E.

This part fits 3 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2008SubaruForester2.5LH4N/AOE Style Design; Use Mini, 20 psi Cap; 1 Row Plastic Tank Aluminum Core
2007SubaruForester2.5LH4N/AOE Style Design; Use Mini, 20 psi Cap; 1 Row Plastic Tank Aluminum Core
2006SubaruForester2.5LH4N/AOE Style Design; Use Mini, 20 psi Cap; 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:

1302145119SA06080126748013021SU3010649

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