Product Description
Cummins 4983253 — Camshaft Bushing (OE)
MPN: 4983253 | Also Known As: camshaft bushing, cam bearing (block bushing) | Notes: Common on ISB/QSB platforms; often used on STORM-block front position—verify by ESN.
Why This Part
- ✓ OE fit & material for proper cam-to-block support.
- ✓ Direct-fit for many 5.9L/6.7L ISB applications (verify by VIN/ESN).
- ✓ Restores oil clearance and reduces cam journal wear.
- ✓ Durable construction to meet Cummins specs.
Quick Specs
| Type | Camshaft bushing (engine block) |
|---|---|
| OE Part # | 4983253 |
| Common Use | ISB/QSB platforms; frequently used on STORM-block front position (confirm by ESN) |
| Qty Required | Per affected cam journal (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2024 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Used on ISB/QSB 5.9 & 6.7 variants; Cummins notes usage around EPA10-era engines—verify by ESN.
Often Paired With
- Other cam bushings (positions): e.g., Cummins 3940059 as applicable
- Camshaft & hardware: cam bolt, thrust plate, dowels
- Service tools: Cummins 3165093 cam gear puller (for cam R&R)
- Gaskets & seals: front cover gasket, front main seal
What’s In The Box
- (1) Genuine Cummins Camshaft Bushing (4983253)
- Additional bushings/tools sold separately (see “Often Paired With”).
Install Tips
- Measure cam journal and block bore; confirm correct bushing position/size.
- Use proper driver/installer; align oil feed holes per service manual.
- After install, verify cam turns freely and oil clearance is within spec.
FAQ
WILL THIS FIT MY 2003–2024 5.9L/6.7L CUMMINS RAM?Yes—commonly used on 2003–2007 5.9L and 2007.5–2024 6.7L ISB applications. Always verify by VIN/ESN and bushing position.
IS THIS THE STORM-BLOCK FRONT (THICK) BUSHING?Many STORM-block 6.7L applications use this bushing on the front position; verify dimensions and ESN before ordering.
HOW MANY BUSHINGS DOES MY ENGINE USE?Quantity varies by engine and journal support strategy. Inspect and replace all affected positions during cam service.
DO I NEED MACHINE WORK?Use proper installation tools and check alignment/clearance. If out of spec, consult a machine shop to prevent premature wear.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 4983253 for exact fit and durability.
