Product Description
The Cummins 4983253 OEM Camshaft Bushing is the factory-correct camshaft support bushing used across 2003–2024 5.9L and 6.7L ISB Cummins engines. This precision-machined bushing maintains proper camshaft alignment, lubrication, and rotational stability—critical for timing accuracy, valvetrain longevity, and overall engine reliability.
Whether you are rebuilding a worn ISB engine, correcting oil-pressure issues, or refreshing a high-mileage Ram 2500/3500, this genuine Cummins camshaft bushing ensures OEM-grade fitment, metallurgy, and durability that aftermarket bushings simply cannot match.
Fitment
- 2003–2007 Dodge Ram 2500/3500 with 5.9L ISB Cummins
- 2007.5–2024 Ram 2500/3500/4500/5500 with 6.7L Cummins
- 5.9L & 6.7L ISB engines in industrial/off-highway equipment (verify by ESN)
Note: Cam bushings require proper installation depth and alignment using Cummins-approved procedures.
Cross-Reference (Cummins-Only)
Pair this camshaft bushing with commonly serviced Cummins valvetrain components:
• Cummins 3903924 OEM Timing Pin
• Cummins 3900267 Tappet Cover Grommet Seal
• Cummins 3910810 Exhaust Rocker Lever
FAQ
What does the Cummins 4983253 camshaft bushing do?
It supports and centers the camshaft, ensuring proper rotational movement and oiling while maintaining correct cam-to-crank timing geometry.
Should the camshaft bushing be replaced during an engine rebuild?
Yes. Cummins recommends replacing worn or out-of-tolerance bushings to prevent cam walk, timing issues, and abnormal valvetrain wear.
Does this bushing fit both 5.9L and 6.7L Cummins engines?
Yes. The 4983253 is used across a wide range of ISB applications from 2003 all the way through current 6.7L engines.
Is special tooling required for installation?
Proper installation requires a camshaft bushing driver and verification of depth/orientation per the Cummins service manual. Incorrect installation can lead to camshaft scoring or oil-pressure loss.
Specifications for cummins 4983253
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 4983253 |
| Component Type | Camshaft Bushing / Cam Support Bearing |
| UPC | Not Published |
| GTIN | Not Published |
| Cross Reference | Used across 5.9L/6.7L ISB camshaft assemblies |
| E-Codes | N/A |
| Shipping Weight | 0.15 lbs |
| Package Dimensions | 2 x 2 x 1 in |
| Prop 65 Warning | Not Applicable |
