Cummins 5.9L 6.7L Injector Sealing Washer

Cummins 3976371 Fuel Injector Seal / Fuel injector Chamber Gasket / Washer for use in the 2003 to 2017 Dodge Ram trucks with the Cummins 5.9L and 6.7L Turbo Diesel Engines. New Fuel Injectors copper gaskets are required each time you remove a fuel injector from your motor. The Cummins diesel engines use the Copper Fuel Injector Washer to seal the injector into the combustion chamber.
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Cummins 3976371

 NOTE: Cummins Parts Are A Non-Returnable Item. Please make sure you have ordered the correct part for your Cummins diesel engine!


Cummins 3976371 Fuel Injector Sealing Washer

This Cummins 3976371 Copper Injector Sealing Washer is a Brand New OEM Cummins part.

What can happen if I reuse my original fuel injector sealing washers?

If you decide not to replace these sealing washers the high compression produced by your diesel engine will escape around the fuel injector. All of your power will escape around the outside edge of your fuel injector. The loss of engine compression will produce a complete mess of the fuel injectors and fuel rail.

Cummins 3976371 applications:

  • 2003 to 2007 Cummins 5.9L Turbo Diesel Engines
  • 2007.5 to 2017 Cummins 6.7L Turbo Diesel Engines

Cummins Fuel Injector Sealing Washer Specifications:

  • Washer Diameter 15.0mm
  • Washer Height 1.50mm

This new sealing washer is for the correct installation of the Cummins 5.9L and 6.7L fuel Injectors. A quantity of 6 Injector sealing washers is necessary for a complete injector service. This seal injector washer is a brand new OEM Cummins replacement part that is covered by the Cummins Warranty.

Product Application
2003 to 2017 Cummins 5.9 & 6.7 Copper Injector Sealing Washer
Item Number
Cummins 3976371
Manufacturer Part No
Cummins 3976371
2500, 3500, 4500, 5500
2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
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