Product Description
Genuine Cummins
Cummins 3900250 — Valve Spring Keeper / Valve Collet
MPN: 3900250 | Also Known As: valve keeper, valve collet, valve lock | Quantity: Sold individually (24 required per 5.9L 12V engine, 2 per valve)
Why This Part
- ✓ OE retainer lock that secures the valve spring to the valve stem.
- ✓ Direct-fit for 5.9L 12-valve B-Series (’89–’98 Ram) for reliable valvetrain retention.
- ✓ Hardened material built to Cummins specifications.
- ✓ Perfect for top-end refresh or full rebuilds.
OE Fit Stock Replacement 24 Per Engine
Quick Specs
| Type | Valve spring keeper / valve collet |
|---|---|
| OE Part # | 3900250 |
| Qty Required | 24 per 5.9L 12V engine (sold individually) |
| Material | Hardened steel (OE spec) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | Ram 5.9L Cummins (12-Valve, 6BT) | Ram 2500/3500 |
Industrial/Off-Highway: Common across B-Series (4B/6B/ISB) applications—verify by ESN.
Often Paired With
- Valve springs & retainers (refresh as a set for even wear)
- Valve stem seals (e.g., 3957912 on many 12V builds)
- Complete top-end gasket set for rebuilds
What’s In The Box
- (1) Genuine Cummins Valve Spring Keeper / Collet (3900250)
- Order 24 pieces for one engine.
Install Tips
- Replace in matched pairs per valve; inspect retainers and valve tips.
- Use proper spring compressor; verify keeper seating before releasing spring.
- During rebuilds, measure installed height and spring pressures to spec.
FAQ
HOW MANY DO I NEED FOR A 5.9L 12-VALVE?Twenty-four total (two keepers per valve × 12 valves). This part is sold individually.
WILL THIS FIT MY 1994–1998 12V RAM?Yes—3900250 is the OE keeper for 12-valve 5.9L B-Series (’89–’98). Verify by VIN/ESN if the cylinder head has been changed.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3900250 with factory geometry and surface treatment.
DOES THIS WORK ON INDUSTRIAL 4B/6B ENGINES?Common on many B-Series industrial variants, but always confirm by Engine Serial Number (ESN).
CAN I REPLACE JUST ONE KEEPER?Replace in pairs per valve and inspect companion components (retainer, spring, valve tip) for wear or damage.
Product Videos
Custom Field
Vehicle Year 1989-1998
Vehicle Make DODGE
ENGINE 5.9L 12V CUMMINS
