Product Description
Genuine Cummins
Cummins 3929734 — Camshaft (B/ISB 5.9L)
MPN: 3929734 | Also Known As: engine camshaft | Common Cross-Refs: 3924109, 3926671, 3929040
Why This Part
- ✓ OE valve timing and durability for long service life.
- ✓ Direct-fit for 5.9L 12-valve applications listed below (verify by VIN/ESN).
- ✓ Restores performance after lobe wear, spalling, or lifter failures.
- ✓ Built to Cummins specs for hardness and geometry.
OE Fit Stock Replacement 1 Per Engine
Quick Specs
| Type | Engine camshaft (B/ISB) |
|---|---|
| OE Part # | 3929734 (cross-refs: 3924109, 3926671, 3929040) |
| Qty Required | 1 per engine (sold individually) |
| Weight | ~19.3 lb (typical ship wt.) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1994–1998 | 5.9L Cummins 12-Valve (6BT) | Dodge/Ram 2500 & 3500 |
Notes: Earlier (’89–’93) and later (’98.5–’02) 5.9L applications may use related camshafts (see cross-refs above). Always verify by VIN/ESN, especially for mixed/industrial builds.
Often Paired With
- Camshaft Gear: 3929028 (5.9L B-Series)
- Cam Thrust Plate/Retainer: 3927155
- Tappets/Lifters (12V): 3931623 (set of 12)
- Front Cover Gasket: 3918673
- Front Crank Seal w/ Sleeve: 3802820
- Assembly lube & fresh oil/filter after install
What’s In The Box
- (1) Genuine Cummins Camshaft (3929734)
- Related gears, lifters, seals sold separately (see “Often Paired With”).
Install Tips
- Inspect lifters and pushrods; replace any with wear patterns or pitting.
- Pre-lube lobes/journals; follow factory torque and timing procedures.
- After initial heat cycle, cut the oil filter to inspect for debris if prior failure occurred.
FAQ
WILL THIS FIT MY 1994–1998 12-VALVE 5.9L CUMMINS?Yes—3929734 is a direct OE camshaft for typical 1994–1998 12-valve B-Series applications (verify by VIN/ESN).
WHAT ARE THE COMMON CROSS-REFERENCE NUMBERS?Frequent cross-refs include 3924109, 3926671, and 3929040 used across B/ISB/QSB families.
SHOULD I REPLACE LIFTERS WITH THE CAM?Recommended—installing new lifters (e.g., 3931623 for 12V) helps the new cam break in correctly and reduces wear.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins camshaft 3929734 manufactured to factory specifications.
DOES THIS INCLUDE THE CAM GEAR OR THRUST PLATE?No—order the gear (3929028) and thrust plate (3927155) separately as needed.
