HomeBelts and Cooling > Radiators, Coolers and Related ComponentsDorman 603-139 Engine Coolant Reservoir - Front
Part #: 603-139

Dorman 603-139 Engine Coolant Reservoir - Front

Front
⚙️ 1 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet, Equinox
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Overview of Dorman Engine Coolant Reservoir for Chevrolet Equinox

The Dorman 603-139 engine coolant reservoir is designed specifically for Chevrolet Equinox models, providing a reliable solution for your vehicle's cooling system. Made from durable plastic with a clear finish, this reservoir allows for easy fluid level monitoring and is built to meet the demands of pressurized cooling systems.

  • Material: Durable plastic construction
  • Length: 187 mm
  • Height: 203 mm
  • Color: Clear for easy coolant level visibility
  • Mounting holes: 2 for secure installation
  • Cap type: Spring loaded twist with a 15 psi pressure rating
  • Cap included with the reservoir
  • Pressurized design compatible with Chevrolet Equinox cooling systems

Detailed Product Description

The Dorman 603-139 engine coolant reservoir is engineered to fit Chevrolet Equinox vehicles, ensuring proper coolant containment and pressure management. Constructed from clear plastic, it allows for quick visual inspection of coolant levels without removing the cap. The reservoir includes a spring loaded twist cap rated for a maximum pressure of 15 psi, maintaining system integrity under operating conditions. With two mounting holes, the reservoir can be securely attached without the need for additional brackets or hardware, which are not included. This part is designed to replace the original equipment reservoir, maintaining the cooling system's efficiency and preventing overheating issues.

Common Applications and Problem Resolution

  • Replacement for cracked or leaking coolant reservoirs
  • Solves coolant overflow and loss issues
  • Prevents engine overheating due to coolant loss
  • Restores proper pressure in the cooling system
  • Eliminates coolant contamination from damaged reservoirs

Installation Notes and Tips

Installation of the Dorman 603-139 engine coolant reservoir requires no additional mounting brackets or hardware, as it uses the existing two mounting holes on the Chevrolet Equinox. Ensure the old reservoir is fully drained and removed carefully to avoid coolant spillage. When installing, verify the spring loaded twist cap is securely tightened to maintain the 15 psi pressure rating. Check for any leaks after installation and refill the cooling system with the appropriate coolant mixture recommended for your vehicle.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The 603-139 engine coolant reservoir undergoes rigorous quality control to provide a dependable replacement for Chevrolet Equinox vehicles. Warranty coverage details can be obtained from the product documentation or manufacturer directly.

BrandDorman
Part Number603-139
Cap IncludedYes
Cap Maximum Pressure Rating15
Cap TypeSpring Loaded Twist
ColorClear
Height203
Length187
MaterialPlastic
Mounting Brackets IncludedNo
Mounting Hardware IncludedNo
Mounting Hole Quantity2
Package Contents1 Coolant Reservoir; 1 Cap
PressurizedYes

This part fits 1 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2005ChevroletEquinox3.4LV6Front

* 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:

10388355DAKG-15320FRT1228CSK603139

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