Part #: 3780

CSF 3780 Radiator

⚙️ 10 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: Honda, Civic
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🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of CSF Radiator Part Number 3780 for Honda Civic

The CSF radiator 3780 is designed specifically for Honda Civic models, providing reliable cooling performance with an OEM-style design. Featuring a durable aluminum core and plastic tanks, this radiator supports efficient heat dissipation to maintain optimal engine temperature.

  • Core thickness: 5/8 inch for effective heat transfer
  • Core dimensions: 17 5/16 inches width by 21 5/8 inches length
  • Constructed with an aluminum core and plastic tanks for durability and corrosion resistance
  • Cross flow design enhances coolant flow and cooling efficiency
  • Inlet and outlet diameters both 1 1/4 inches, positioned left and right respectively
  • Single-row radiator core for standard cooling capacity
  • Cap not included

Detailed Product Description

This CSF radiator (part number 3780) is engineered to meet the cooling requirements of Honda Civic vehicles. The aluminum core provides lightweight strength and excellent thermal conductivity, while the plastic tanks reduce weight and resist corrosion. The cross flow core design allows coolant to flow horizontally across the radiator, improving heat exchange efficiency. With a core thickness of 5/8 inch and a single-row configuration, this radiator balances cooling performance with compact size. The inlet and outlet ports are sized at 1 1/4 inches and positioned on the left and right sides, matching OEM specifications for straightforward installation.

Common Applications and Issues Addressed

  • Replacement for leaking or damaged radiators in Honda Civic models
  • Resolves engine overheating caused by inefficient cooling
  • Addresses coolant leaks from cracked or corroded radiator tanks
  • Improves cooling system performance after radiator core clogging
  • Suitable for restoring OEM cooling system functionality

Installation Notes and Tips

Ensure compatibility with your specific Honda Civic model year before installation. The radiator features OEM-style plastic tanks and aluminum core, so handle with care to avoid damage during installation. Verify inlet and outlet hose connections match the 1 1/4 inch diameter ports on the left and right sides. Since the radiator cap is not included, reuse the existing cap or source a compatible replacement separately.

Quality Assurance and Warranty

CSF radiators are manufactured to meet OEM standards for fit and function. This radiator features a robust aluminum core and plastic tanks designed for durability and corrosion resistance. While specific warranty details are not provided, CSF products typically undergo quality control testing to ensure reliable performance in Honda Civic cooling systems.

BrandCSF
Part Number3780
Core Thickness5/8
Core Width17 5/16
Core MaterialAluminum
Tank MaterialPlastic
Core Length21 5/8
Inlet Diameter1 1/4 left
Outlet Diameter1 1/4 right
Down Flow Or Cross Flow TypeCross flow
Radiator Core Row Quantity1
Cap IncludedNo
Box Height (in)5 1/2
Box Length (in)28 1/16
Box Weight (lbs)7
Box Width (in)21 9/16
Hazardous MaterialNo
Inlet Length (in)17 15/16
Inlet Width (in)1 3/8
Outlet Length (in)17 15/16
Outlet Width (in)1 3/8
Tech NoteO.e.m. style plastic tanks & aluminum core.

This part fits 10 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
2020HondaCivicSedan2.0LL4N/AOE style design ensures optimal fitment and performance.
2020HondaCivicCoupe2.0LL4N/AOE style design ensures optimal fitment and performance.
2019HondaCivicSedan2.0LL4N/AOE style design ensures optimal fitment and performance.
2019HondaCivicCoupe2.0LL4N/AOE style design ensures optimal fitment and performance.
2018HondaCivicCoupe2.0LL4N/AOE style design ensures optimal fitment and performance.
2018HondaCivicSedan2.0LL4N/AOE style design ensures optimal fitment and performance.
2017HondaCivicCoupe2.0LL4N/AOE style design ensures optimal fitment and performance.
2017HondaCivicSedan2.0LL4N/AOE style design ensures optimal fitment and performance.
2016HondaCivicCoupe2.0LL4N/AOE style design ensures optimal fitment and performance.
2016HondaCivicSedan2.0LL4N/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:

1358319010-5BA-A01CU13583HO3010240

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