Expansion Tank 3978212

positive OEM
Cummins
Part# 3978212
note
Coolant reservoir managing thermal expansion and system pressure.
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Extended Lead Time
non-returnable Non-returnable info
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Description

The Cummins Expansion Tank (3978212) is a coolant reservoir designed to manage thermal expansion and contraction within engine cooling systems. It regulates coolant volume and pressure to maintain system stability and prevent damage from pressure fluctuations.

Key Specifications

  • Application: QSB6.7 M CM2250, QSC8.3 CM850, QSM11 CM570
  • Function: Manages coolant volume and pressure
  • Compatibility: Heavy-duty truck engines
  • Construction: Corrosion-resistant materials
  • Features: Pressure cap, 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). 

 

For more shipping information, please see our Shipping & Delivery page.

More Information

Current Part# 3978212
Type OEM
Part# variations 3978212 CUM,
3978212CUM
Manufacturer Cummins
Warranty Standard Manufacturer Warranty