Product Description
The CUMMINS 3900250 OEM VALVE SPRING KEEPER, also known as a valve collet or valve lock, is a genuine Cummins valvetrain component designed for 1989-1998 Dodge Ram 5.9L Cummins 12-valve diesel engines. This precision-machined keeper secures the valve spring retainer to the valve stem to maintain proper valve spring tension and reliable engine operation.
Valve spring keepers are critical for maintaining valvetrain integrity under high RPM, towing, and heavy-load conditions. Worn, damaged, or improperly seated valve keepers can lead to valvetrain instability and catastrophic engine damage. Genuine Cummins hardware ensures proper fitment, material hardness, and long-term durability.
The Cummins 3900250 valve spring keeper is commonly used during cylinder head rebuilds, valve jobs, engine overhauls, and preventative valvetrain maintenance on 5.9L 12V Cummins engines.
FEATURES
- Genuine Cummins OEM valve spring keeper / valve collet
- Fits 1989-1998 5.9L Cummins 12V engines
- Secures valve spring retainer to valve stem
- OEM-quality hardened steel construction
- Precision-machined for proper valve lock engagement
- Ideal for cylinder head rebuilds and valve service
- Direct OEM replacement component
- Designed for long-term valvetrain durability
FITMENT
- 1989-1993 Dodge Ram D250/D350/W250/W350 5.9L Cummins 12V
- 1994-1998 Dodge Ram 2500/3500 5.9L Cummins 12V
- Fits OEM Cummins 12-valve cylinder head configurations
Fitment Note: Multiple valve spring keepers are required per engine. Verify quantity needed before ordering.
WHAT'S INCLUDED
- 1 Cummins 3900250 OEM valve spring keeper (valve collet)
CROSS-REFERENCE & RELATED PRODUCTS
- CUMMINS 3910324 OEM VALVE SPRING
- CUMMINS 3901177 OEM VALVE SPRING RETAINER
- HAMILTON CAMS 103LB VALVE SPRINGS
- ARP 247-4203 HEAD STUD KIT
- CUMMINS OEM ENGINE PARTS
WHY REPLACE VALVE SPRING KEEPERS?
Valve spring keepers are responsible for locking the valve spring retainer securely to the valve stem under constant engine load and vibration. During cylinder head rebuilds or valve spring upgrades, replacing worn or damaged keepers helps maintain proper valve retention, spring pressure, and long-term valvetrain reliability.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Manufacturer | Cummins |
| Part Number | 3900250 |
| Component Type | Valve spring keeper / valve collet |
| Engine Compatibility | 5.9L Cummins 12V |
| Fitment Years | 1989-1998 |
| Material | OEM hardened steel |
| Application | Cylinder head rebuilds, valve service, engine overhaul |
| Condition | New Genuine Cummins OEM Part |
| Prop 65 | Warning: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |
FAQ
What does the Cummins 3900250 valve spring keeper do?
The valve spring keeper locks the valve spring retainer onto the valve stem to maintain proper valve spring tension and secure valve operation.
Will this fit all 5.9L Cummins engines?
This valve spring keeper is designed specifically for 1989-1998 5.9L Cummins 12-valve engines.
Should valve spring keepers be replaced during a cylinder head rebuild?
Yes. Replacing valve keepers during head service or valve spring replacement is recommended to maintain proper valvetrain retention and reliability.
Is this a genuine Cummins OEM component?
Yes. Cummins 3900250 is a genuine OEM Cummins valve spring keeper manufactured to factory specifications.
