HomeBelts and Cooling > Radiators, Coolers and Related ComponentsDorman 603-844 Engine Coolant Reservoir
Part #: 603-844

Dorman 603-844 Engine Coolant Reservoir

⚙️ 65 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford, Transit, Transit-150, Transit-250, Transit-350, and Transit-350 HD
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Overview of Dorman Engine Coolant Reservoir 603-844

The Dorman Engine Coolant Reservoir 603-844 is designed to maintain optimal coolant levels in Ford Transit vehicles. This clear plastic reservoir features a twist cap and pressurized design to support efficient engine cooling.

  • Material: Durable clear plastic for easy coolant level monitoring
  • Capacity: 6.3 quarts to accommodate cooling system needs
  • Dimensions: 12 inches length and 9.5 inches height with a circular shape
  • Mounting: Includes mounting brackets and two mounting holes for secure installation
  • Cap: Twist type cap included with a maximum pressure rating of 21 psi
  • Pressurized reservoir to maintain system pressure and prevent coolant loss

Detailed Product Description

This engine coolant reservoir by Dorman is engineered specifically for Ford Transit models including Transit, Transit-150, Transit-250, Transit-350, and Transit-350 HD. Constructed from clear plastic, it allows for quick visual inspection of coolant levels without removal. The circular shape and included mounting brackets ensure a proper fit and secure attachment within the engine bay. The twist cap is designed to maintain a pressurized environment up to 21 psi, which helps prevent overheating and coolant evaporation. Although the reservoir does not include a level sensor, it is compatible with existing vehicle sensors and systems.

Common Applications and Problem Resolution

  • Replacement for cracked or leaking coolant reservoirs in Ford Transit vehicles
  • Restores proper coolant containment to prevent engine overheating
  • Addresses coolant loss due to damaged or faulty reservoirs
  • Helps maintain system pressure for efficient engine cooling
  • Supports coolant level monitoring with clear plastic construction

Installation Notes and Tips

Before installation, ensure the engine is cool to avoid injury from hot coolant. This reservoir includes mounting brackets but does not come with additional mounting hardware, so verify existing hardware condition. The twist cap should be securely tightened to maintain system pressure. Check for any leaks after installation and refill the cooling system as needed according to manufacturer specifications.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-844 engine coolant reservoir is made from durable materials designed to withstand typical engine bay conditions. While specific warranty details are not provided here, Dorman generally offers limited warranties on their replacement parts to ensure reliability and customer satisfaction.

BrandDorman
Part Number603-844
MaterialPlastic
Length12
ColorClear
Mounting Hardware IncludedNo
Height9.5
ShapeCircular
Mounting Hole Quantity2
Mounting Brackets IncludedYes
Cap TypeTwist
PressurizedYes
Cap Maximum Pressure Rating21
Level Sensor IncludedNo
Cap IncludedYes
Capacity6.3 qt.
Package Contents1 coolant reservoir; 1 cap

This part fits 65 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2019FordTransit3.7LV6N/A
2019FordTransit-1503.5LV6N/A
2019FordTransit-1503.7LV6N/A
2019FordTransit-1503.2LL5N/A
2019FordTransit-2503.5LV6N/A
2019FordTransit-2503.7LV6N/A
2019FordTransit-2503.2LL5N/A
2019FordTransit-3503.5LV6N/A
2019FordTransit-3503.7LV6N/A
2019FordTransit-3503.2LL5N/A
2019FordTransit-350 HD3.5LV6N/A
2019FordTransit-350 HD3.7LV6N/A
2019FordTransit-350 HD3.2LL5N/A
2018FordTransit3.7LV6N/A
2018FordTransit-1503.5LV6N/A
2018FordTransit-1503.7LV6N/A
2018FordTransit-1503.2LL5N/A
2018FordTransit-2503.5LV6N/A
2018FordTransit-2503.7LV6N/A
2018FordTransit-2503.2LL5N/A
2018FordTransit-3503.5LV6N/A
2018FordTransit-3503.7LV6N/A
2018FordTransit-3503.2LL5N/A
2018FordTransit-350 HD3.5LV6N/A
2018FordTransit-350 HD3.7LV6N/A
2018FordTransit-350 HD3.2LL5N/A
2017FordTransit3.7LV6N/A
2017FordTransit-1503.5LV6N/A
2017FordTransit-1503.7LV6N/A
2017FordTransit-1503.2LL5N/A
2017FordTransit-2503.5LV6N/A
2017FordTransit-2503.7LV6N/A
2017FordTransit-2503.2LL5N/A
2017FordTransit-3503.5LV6N/A
2017FordTransit-3503.7LV6N/A
2017FordTransit-3503.2LL5N/A
2017FordTransit-350 HD3.5LV6N/A
2017FordTransit-350 HD3.7LV6N/A
2017FordTransit-350 HD3.2LL5N/A
2016FordTransit3.7LV6N/A
2016FordTransit-1503.5LV6N/A
2016FordTransit-1503.7LV6N/A
2016FordTransit-1503.2LL5N/A
2016FordTransit-2503.5LV6N/A
2016FordTransit-2503.7LV6N/A
2016FordTransit-2503.2LL5N/A
2016FordTransit-3503.5LV6N/A
2016FordTransit-3503.7LV6N/A
2016FordTransit-3503.2LL5N/A
2016FordTransit-350 HD3.5LV6N/A
2016FordTransit-350 HD3.7LV6N/A
2016FordTransit-350 HD3.2LL5N/A
2015FordTransit3.7LV6N/A
2015FordTransit-1503.5LV6N/A
2015FordTransit-1503.7LV6N/A
2015FordTransit-1503.2LL5N/A
2015FordTransit-2503.5LV6N/A
2015FordTransit-2503.7LV6N/A
2015FordTransit-2503.2LL5N/A
2015FordTransit-3503.5LV6N/A
2015FordTransit-3503.7LV6N/A
2015FordTransit-3503.2LL5N/A
2015FordTransit-350 HD3.5LV6N/A
2015FordTransit-350 HD3.7LV6N/A
2015FordTransit-350 HD3.2LL5N/A

* 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:

BK2Z8A080B

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