CUMMINS
CUMMINS 3999820 OEM CRANKCASE BREATHER GASKET (CCV FILTER GASKET) – ISB 6.7L (2007.5–2024)
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- SKU:
- CUM3999820
- MPN:
- 3999820
- Shipping:
- Calculated at Checkout
Description
Genuine Cummins
Cummins 3999820 — Crankcase Breather Gasket (CCV Filter Gasket)
MPN: 3999820 | Also Known As: crankcase ventilation (CCV) filter gasket, breather gasket | Location: Breather/CCV assembly to valve cover interface
Why This Part
- ✓ OE sealing between the breather/CCV assembly and valve cover to prevent oil seep and pressure loss.
- ✓ Direct-fit for 6.7L ISB Ram applications—use whenever servicing the CCV filter.
- ✓ Maintains proper crankcase ventilation and helps keep the engine bay clean.
- ✓ Genuine Cummins material quality for long service life.
OE Fit Stock Replacement 1 Per Engine
Quick Specs
| Type | Crankcase Breather / CCV Filter Gasket |
|---|---|
| OE Part # | 3999820 |
| Qty Required | 1 per engine (sold individually) |
| Service Note | Replace the gasket whenever the CCV filter is replaced or the breather is removed |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2007.5–2024 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Common on ISB/QSB 6.7 EPA13+ variants—verify by ESN.
Often Paired With
- Crankcase Ventilation (CCV) Filter: replace gasket any time the filter is serviced
- Breather/valve cover cleaning: wipe sealing surfaces before install
- Fresh air filter & oil change: if contamination was present
What’s In The Box
- (1) Genuine Cummins Crankcase Breather Gasket (3999820)
- Breather/CCV filter sold separately
Install Tips
- Clean both mating surfaces; do not use sealant unless factory procedure specifies.
- Seat gasket evenly; torque fasteners per spec and pattern.
- After first heat cycle, inspect for any oil seep around the breather perimeter.
FAQ
WILL THIS FIT MY 2007.5–2024 6.7L CUMMINS RAM?Yes—this is the OE breather/CCV gasket for most 2007.5–2024 Ram 6.7L ISB applications (confirm by VIN/ESN for late-year running changes).
DO I NEED TO REPLACE THE GASKET EVERY TIME I CHANGE THE CCV FILTER?Best practice is to replace the gasket whenever the CCV filter is serviced or the breather is removed to ensure a proper seal.
DOES THIS INCLUDE THE CCV FILTER?No—this listing is the gasket only. The CCV filter is sold separately.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3999820 for proper fit and durability.
IS THIS USED ON INDUSTRIAL ISB/QSB 6.7 ENGINES?Yes, it is common on EPA13+ ISB/QSB 6.7 variants—always verify by ESN.
Additional Information
Vehicle Year: |
2007.5,2008,2009,2010,2011,2012 |
Vehicle Make: |
DODGE |
ENGINE: |
6.7L |
Part Type: |
CCV Gasket |
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