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    • JTL Parts Coolant Reservoir Tank 603-5201 (Engine Coolant Expansion Tank / Radiator Overflow Reservoir) – Replacement for 05-23045-000 / 05-23045-001 / 05-20529-000 – Freightliner Columbia Heavy Duty Cooling System

    JTL Parts Coolant Reservoir Tank 603-5201 (Engine Coolant Expansion Tank / Radiator Overflow Reservoir) – Replacement for 05-23045-000 / 05-23045-001 / 05-20529-000 – Freightliner Columbia Heavy Duty Cooling System

    Vendor: JTL Parts
    COOLANT RESERVOIR 603-5201 Engine Coolant Tank Replacement for 603-5201 / Freightliner Columbia – Heavy Duty Application The Coolant Reservoir 603-5201 is designed for heavy-duty Freightliner trucks, providing a reliable expansion...
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      COOLANT RESERVOIR 603-5201 Engine Coolant Tank

      Replacement for 603-5201 / Freightliner Columbia – Heavy Duty Application

      The Coolant Reservoir 603-5201 is designed for heavy-duty Freightliner trucks, providing a reliable expansion and storage system for engine coolant. This reservoir helps maintain proper coolant levels, prevents overheating, and ensures stable engine temperature under demanding operating conditions.


      Product Details

      • Part Number: 603-5201
      • Type: Coolant Reservoir / Expansion Tank
      • Application: Engine Cooling System
      • Cross Reference: 603-5201, 05-23045-000, 05-23045-001, 05-20529-000

      Key Benefits

      • Maintains correct coolant level in the system
      • Prevents engine overheating and thermal stress
      • Designed for high-pressure cooling systems
      • Durable construction for heavy-duty trucking applications
      • Helps ensure stable engine temperature control

      Function

      • Stores excess coolant during thermal expansion
      • Returns coolant to the system as temperature changes
      • Maintains pressure balance in the cooling system
      • Supports continuous engine cooling performance

      High-Quality Construction

      • Reinforced high-strength plastic tank
      • Heat and vibration resistant design
      • OEM-style fit and durability
      • Includes pressure-rated cap (15 PSI)

      Vehicle Fitment

      Compatible with heavy-duty Freightliner applications:

      • Freightliner Columbia
      • Freightliner Century Class
      • Freightliner Coronado

      Fits Models

      • Freightliner Columbia 112 / 120
      • Freightliner Century Class
      • Freightliner Coronado

      Note: Fitment may vary depending on engine and configuration. Always verify part number before purchase.

      Replaces / Cross Reference Numbers

      • 603-5201
      • 05-23045-000
      • 05-23045-001
      • 05-20529-000

      Installation

      • Direct replacement design
      • Factory-style mounting points
      • No modifications required

      Package Includes

      • 1 x Coolant Reservoir
      • 1 x Pressure Cap
      Product specifications
      Specification Name Specification Value
      Item condition New
      Item material Plastic
      Manufacturer type Aftermarket
      Documents
      Wheel Fitment Guide.pdf Download
      Brake Upgrade Manual.pdf Download
      Tire Care & Warranty.pdf Download
      Service & Support

      Warranty

      This product is backed by a 12-month limited warranty, covering defects in materials and workmanship under normal use.

      Technical Assistance

      Our dedicated support team is available to assist with product setup, operation guidance, and troubleshooting. Contact us via email or phone for prompt service.

      Documentation & Downloads

      Access essential resources including the user manualtechnical specifications, and safety instructions in our online support center.

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