Description
| Specifications | • OEM Part Number: 5253887
• Component Type: Intake Rocker Arm • Quantity Included: 6 Pieces (Complete Intake Side Set for One Cylinder Bank Section) • Engine Platform: Cummins ISC / QSC / ISL Series • Engine Displacement: 8.3L / 8.9L (depending on configuration) • Engine Family Control Modules: CM850, CM2150, CM2250 • Material: Forged Alloy Steel • Heat Treatment: Induction Hardened Contact Surfaces • Surface Finish: Precision Machined Valve Pad and Shaft Bore • Lubrication Type: Pressurized Engine Oil Feed • Installation Location: Intake Valve Side • Condition: New, Aftermarket OEM-Quality Replacement |
| Description: | This listing includes 6 brand-new intake rocker arms, OEM reference 5253887, engineered for Cummins ISC, ISC8.3, QSC8.3, and ISL diesel engines. These rocker arms are precision-machined and heat-treated to withstand high valve spring pressure and continuous heavy-duty operation.
Designed for commercial trucks, buses, motorhomes, construction, and industrial applications, this rocker arm set restores proper valve lift, timing geometry, and combustion efficiency.
If you are experiencing valve train noise, uneven cylinder contribution, intake valve misfire, or abnormal lash settings, worn rocker arms are a common root cause. |
| Engine Number: | Fits Cummins ISC / ISC8.3 / QSC8.3 / ISL
Control Modules: CM850 / CM2150 / CM2250
Engine Platforms Cummins ISC 8.3L Cummins QSC 8.3L Cummins ISL 8.9L
ECM Families CM850 CM2150 CM2250
|
| Interchange Part Number for Reference: Applications: | 5253887
Cummins OE 5253887
Reference Only. Always verify by engine serial number (ESN) before ordering. |
| Applications: | Compatible with engines used in:
Freightliner M2 Always confirm by ESN and CPL.
• Freightliner medium- and heavy-duty trucks • International trucks • Kenworth and Peterbilt vocational units • Blue Bird and Thomas buses • Motorhomes with ISC or ISL engines • Construction and industrial equipment powered by Cummins 8.3L / 8.9L |
| Important Fitment Note:
|
Cummins engines vary by CPL and ESN.
Before ordering, confirm: Engine Serial Number Engine Model (ISC, QSC, ISL) Control Module (CM850, CM2150, CM2250) Intake vs Exhaust Rocker Requirement If unsure, message us with your ESN and we will verify compatibility. |
| Warning: | Improper installation may result in severe engine damage.
• Always inspect the rocker shaft for wear or scoring. • Replace damaged push rods • Verify proper valve lash after installation. • Follow Cummins service manual torque specifications. |
| Quality Assurance Note: | Each rocker arm is
• Precision CNC machined • Heat treated for long service life • Inspected for dimensional accuracy • Checked for bore tolerance and valve pad geometry
Built to meet or exceed OEM performance standards. Note: Worn intake rocker arms can cause valve train ticking, unstable valve lash, power loss, and uneven cylinder performance. Excessive pad wear reduces proper valve lift and can lead to accelerated wear of push rods and rocker shafts. Replacing worn rocker arms restores correct valve geometry and helps maintain proper engine breathing and durability |
| Features: | • Direct OEM replacement – No modification required
• Heavy-duty forged construction • Accurate valve geometry • Restores proper engine breathing • Reduces valve train noise • Designed for commercial fleet durability |
| Shipping Weight and Dimensions: | Estimated Shipping Weight: 6–8 lbs
Package Dimensions: Approx. 12 in x 8 in x 6 in |
Reviews
There are no reviews yet.