Product Description
Cummins 3926700 — Intake Valve Spring (B-Series 4BT/6BT, 5.9L 12-Valve)
MPN: 3926700 | Also Known As: intake valve spring, B-Series valve spring | Common Pair: Exhaust spring 3916691 (see “Often Paired With”)
Why This Part
- ✓ OE spring rate & metallurgy for stable valve control at factory RPM/boost.
- ✓ Direct-fit intake spring for 5.9L 12-valve 6BT (1989–1998) and 3.9L 4BT B-Series (verify by ESN).
- ✓ Helps prevent valve float that can lead to power loss and valvetrain wear.
- ✓ Sold individually—order 6 for intake valves on a 12-valve 5.9L.
Quick Specs
| Type | Intake valve spring (B-Series) |
|---|---|
| OE Part # | 3926700 |
| Qty Required | 6 per 12-valve 5.9L (intake side), sold individually |
| Cross-Reference | 3900276 (ref.), verify application |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | Ram 5.9L 12-Valve (6BT) | Ram 2500/3500 |
Industrial/Off-Highway: 3.9L 4BT & other B-Series applications (confirm by Engine Serial Number). Cummins notes primary use on Euro-2 3.9L B engines.
Often Paired With
- Exhaust Valve Spring: 3916691 (typical exhaust-side pairing on 12V)
- Valve Stem Seals: 3921640
- Valve Cover Gasket: 3902666
What’s In The Box
- (1) Genuine Cummins Intake Valve Spring (3926700)
- Related seals/springs sold separately (see “Often Paired With”).
Install Tips
- Use a proper valve spring compressor; replace keepers/locks if worn.
- Maintain clean assembly; inspect retainer/seat for wear.
- After install, verify lash per factory procedure.
FAQ
WILL THIS FIT MY 1989–1998 5.9L 12-VALVE?Yes—3926700 is commonly used as the intake valve spring on 1989–1998 5.9L 12-valve (6BT) applications; always verify by VIN/ESN.
HOW MANY SPRINGS DO I NEED?For a 5.9L 12-valve, there are 12 valves total. This intake spring is used on the 6 intake valves (order 6). The exhaust side typically uses 3916691.
DOES THIS ALSO FIT 4BT/INDUSTRIAL?Yes—3926700 is used on B-Series including 3.9L 4BT. Confirm by ESN and application.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins valve spring with factory rate and material spec.
DO I NEED HEAVIER SPRINGS FOR PERFORMANCE BUILDS?For high boost/RPM, performance spring kits are recommended. For stock setups, this OE spring is correct.
