Product Description
Cummins 3945268 — Crankcase Breather Molded Hose (Front Cover to Catch Bottle)
MPN: 3945268 | Also Known As: crankcase breather hose, CCV hose, molded hose | Location: Timing/front gear cover breather to factory oil catch bottle
Why This Part
- ✓ OE-formed hose for proper routing and no kinks.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L ISB 24-valve.
- ✓ Restores clean crankcase ventilation to reduce mess and odors.
- ✓ Durable OEM rubber to resist heat, oil, and ozone cracking.
Quick Specs
| Type | Molded crankcase breather hose (CCV) |
|---|---|
| OE Part # | 3945268 |
| Interfaces | Breather on timing/front gear cover → factory catch bottle |
| Qty Required | 1 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB (24V) | Ram 2500/3500 |
Notes: Intended for ’98.5–’02 24-valve ISB. Some industrial B-series (3.9/5.9) applications also use 3945268—confirm by ESN.
Often Paired With
- CCV Filter: Cummins 3944961
- O-Ring (oil fill/CCV service): Cummins 3903475
- Inspect the catch bottle and lines; clean as needed
What’s In The Box
- (1) Genuine Cummins Crankcase Breather Molded Hose (3945268)
- Clamps and related hardware sold separately.
Install Tips
- Route along OEM path; avoid abrasion points.
- Use new clamps; verify secure engagement at both ends.
- After installation, check for leaks/vapor escape with engine at operating temp.
FAQ
WILL THIS FIT MY 1998.5–2002 24-VALVE 5.9L CUMMINS?Yes—this is the OE molded breather hose for ’98.5–’02 24-valve ISB Ram 2500/3500 (verify by VIN/ESN).
DOES IT INCLUDE CLAMPS OR THE CATCH BOTTLE?No—hose only. Reuse or replace clamps as needed; inspect the factory catch bottle for cleanliness and cracks.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3945268 with factory shape and material for proper routing and durability.
WHAT IF MY TRUCK IS A 12-VALVE (’94–’98)?Routing and components differ on many 12-valve setups. This hose targets ’98.5–’02 24-valve; confirm by VIN/ESN for other years.
WHAT ARE SYMPTOMS OF A FAILING CCV HOSE?Oil mist on the front cover, soft/cracked rubber, or odor in the bay. Replace promptly to keep the CCV system functioning properly.
