Cummins 3683814 O-Ring Seal

Keep your Cummins diesel engine properly sealed with the Cummins 3683814 O-Ring Seal. This precision-fit sealing component is used in Cummins heavy-duty engine applications and is commonly associated with the water pump/EGR coolant tube sealing system on certain Cummins ISX engines. It is designed to help maintain a secure, leak-resistant connection and support reliable cooling system operation.

This part is also listed by Cummins and major heavy-duty parts suppliers as an O-ring seal, with application references including Cummins ISX/QSX configurations. Always verify fitment by engine serial number before ordering.

Features & Benefits

• Genuine Cummins part number 3683814
• Precision-fit O-ring seal
• Helps prevent coolant or system leaks
• Commonly used in Cummins heavy-duty engine applications
• Associated with ISX water pump/EGR coolant tube applications
• Direct replacement by OEM part number
• Compact and easy to store

Cross References

• PAI: CUP121422
• Gent-L-Kleen: 121422

Fitment

Commonly referenced for select Cummins ISX and QSX heavy-duty diesel engines. Fitment can vary by engine configuration and serial number, so please verify compatibility before purchase.