Product Description
Genuine Cummins
Cummins 3946168 — Valve Cover Bolt (Captive Isolator Cap Screw)
MPN: 3946168 | Also Known As: valve cover bolt, captive isolator cap screw, rocker cover bolt | Notes: 5 required per valve cover (sold individually)
Why This Part
- ✓ OE hardware that secures the 24-valve rocker/valve cover for a leak-free seal.
- ✓ Direct-fit for 1998.5–2002 Ram 5.9L 24-valve ISB.
- ✓ Captive isolator design helps damp vibration and maintain gasket compression.
- ✓ Genuine Cummins quality for thread integrity and long service life.
OE Fit Stock Replacement 5 Per Cover
Quick Specs
| Type | Valve cover bolt / captive isolator cap screw |
|---|---|
| OE Part # | 3946168 |
| Qty Required | 5 per valve cover (sold individually) |
| Applications | Designed for BS3 5.9L B-Series; see automotive fitment below |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1998.5–2002 | Ram 5.9L ISB (24V) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on BS3 5.9L B-Series variants; verify by ESN.
Often Paired With
- Rubber Bolt Washer: Cummins 3942659 (1998.5–2002)
- Valve Cover Gasket: Cummins 3935878 (1998.5–2002)
What’s In The Box
- (1) Genuine Cummins Valve Cover Bolt (3946168)
- Washer and gasket sold separately (see “Often Paired With”).
Install Tips
- Replace rubber bolt washers with new parts to maintain clamp load and sealing.
- Inspect the valve cover gasket; replace if brittle, torn, or leaking.
- Tighten evenly across all five bolts to avoid warping the cover.
FAQ
WILL THIS FIT MY 1998.5–2002 5.9L 24-VALVE RAM?Yes—this OE bolt is used on 2nd-gen 24-valve 5.9L ISB (verify by VIN/ESN).
HOW MANY BOLTS DO I NEED, AND DO I NEED NEW WASHERS?You’ll need 5 bolts per valve cover. We recommend new rubber bolt washers (Cummins 3942659) during reassembly.
DOES THIS INCLUDE THE WASHER OR GASKET?No—order washers (3942659) and the valve cover gasket (3935878) separately.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3946168 for proper fit and durability.
WHAT’S THE INDUSTRIAL/ENGINE FAMILY CONTEXT?Used primarily on BS3 5.9L B-Series applications; confirm by ESN if ordering for non-automotive engines.
Product Videos
Custom Field
Vehicle Year 1998.5-2002
Vehicle Make DODGE
ENGINE 5.9L CUMMINS
