Expansion Tank 3971620

positive OEM
Cummins
Part# 3971620
note
OLD# 4019845
Cooling system expansion tank managing coolant volume and pressure changes.
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Extended Lead Time
non-returnable Non-returnable info
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Description

The Cummins Expansion Tank (3971620) is a cooling system component that manages coolant volume changes due to temperature fluctuations. It maintains system pressure by accommodating coolant expansion and contraction, supporting efficient thermal regulation in heavy-duty engine cooling circuits.

Key Specifications

  • Application: 6C8.3, QSB5.9 CM850, QSB6.7 M CM2250 engines
  • Function: Manages coolant volume and system pressure
  • Compatibility: Heavy-duty commercial truck engines
  • Construction: Corrosion-resistant plastic, heat-resistant materials
  • Features: Integrated pressure cap, clear sight glass, thermal expansion reservoir
  • Quality: OEM Cummins part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

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More Information

Current Part# 3971620
Old Part No.: 4019845
Type OEM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty