Interstate-McBee M-3999820 Crankcase Breather Gasket – 07.5–18 6.7L Cummins

OE-style crankcase breather (CCV) gasket that seals the breather housing to the valve cover on 2007.5–2018 6.7L Cummins ISB engines. Ideal to replace any time you service or replace the crankcase ventilation filter to prevent oil mist seepage and maintain proper crankcase pressure.

• Direct replacement: Interchange with Cummins 3999820 (breather/CCV gasket).
• OE-equivalent construction: Precisely cut sealing media for a leak-free fit.
• Service best-practice: Replace during every CCV filter service to avoid repeat labor.
• Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.

Specifications

Vehicle Fitment

Fitment is based on engine family; confirm by VIN or ESN for edge-case builds.

• Dodge Ram 2500/3500 with 6.7L Cummins ISB (model years 2007.5–2018)
• Also used on select ISB/QSB 6.7 platforms with the same breather/cover interface

Install Notes

• Remove breather cover, clean mating surfaces thoroughly, and inspect for warpage.
• Install new gasket dry unless otherwise specified by the service manual; avoid over-torque.
• Replace the CCV filter per maintenance interval; pairing filter + gasket minimizes comeback leaks.

Warranty

Interstate-McBee new parts carry manufacturer warranty coverage against defects in materials and workmanship. For terms and claims procedure, contact us prior to installation.

Why Buy From CPP Diesel

• Expert Cummins fitment support with ESN verification
• Fast shipping and easy returns
• Inventory curated for B/ISB service jobs and preventative maintenance

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