4934058 Water Pump is an OEM replacement part for Cummins ISC/ISL series engines, designed specifically for the thermal management requirements of Stage 2 9.3L models. It employs a proven mechanical centrifugal design. Its dimensions, mounting interfaces, and drive parameters perfectly match the original equipment, enabling seamless direct installation without modification. CFD-optimized impeller and flow channels enhance coolant circulation efficiency. Paired with a high-strength cast iron housing, hardened bearings, and premium sealing components, it withstands demanding conditions including heavy equipment loads, frequent start-stops, and extreme environments. As a direct upgrade replacement for models such as 3973114 and 5291445, it is compatible with Stage 2 9.3L ISC/ISL base models and derivatives like L375 and QSL9. Offering superior cooling efficiency and durability, it serves as the preferred replacement component for long-haul transportation, mining operations, and stationary power generation applications.
| Part Name | Water Pump | Part Number | 4934058 |
| Product Type | Engine Cooling Pump | Pump Type | Mechanical centrifugal pump |
| Installation Interface | Same as original pump | Purpose | Repair/replace/aftermarket |
| Mounting Torque | Original facotry standard | Operating Temperature | -40℃ - 120℃ |
| Origin | China | Quality | OEM standard |
| Package | Standard Industrial Packing | Compatible Engine Type | Diesel engine |
| Compatible Standard | Stage 2 emission standard | Compatible Displacement | 9.3 liter |
| Compatible Engine | Stage 2 9.3 liter ISC/ISL engines | ||
| Compatible Engine Model | 6C8.3, ISL CM2150, ISL CM850, ISL8.9 CM2150 L110, ISL8.9 CM2880 L112, ISL9 CM2150 SN, ISL9.5 CM2150 SN, ISLE4 CM850, L8.9, L9 CM2670 L136C, L9.5 L117,QSL9 CM850(CM2850) | ||
- OEM-Precision Fit: Fully compatible with engine mounting holes and pulleys for direct installation without modifications, minimizing installation errors and rework risks.
- High-Efficiency Cooling: Optimized impeller and flow channel design enhances coolant circulation efficiency, accommodating thermal management needs across multiple engine models to prevent overheating under heavy loads.
- Durable and Reliable Design: High-strength cast iron housing resists impact, hardened bearings withstand wear, and anti-aging seals prevent leakage. Designed for complex operating conditions to extend service life.
- Emission Synergy Compatibility: Stable heat dissipation supports aftertreatment systems (e.g., catalytic converters) in maintaining optimal operating temperatures, ensuring emission compliance.
- Maintenance Convenience: Includes installation seals; some kits feature gaskets. Mature construction facilitates inspection, replacement, and repeated maintenance.
| Models containing the spare part 4934058 Water pump | |||
| ENGINES | |||
|
|
|
|
| Units containing the spare part 4934058 Water pump | |||
|
|
||
| 4934058 included into Kit | |||
|
|
|
|
| Replacement parts for 4934058 Water pump | |||
|
|||
1. Which engines is part number 4934058 compatible with?
Primarily compatible with Stage 2 emissions standard 9.3L ISC/ISL series engines. Also fits derivative models like L375 and QSL9. Direct replacement for older water pumps such as 3973114 and 5291445.
2. Can it be used on non-Stage 2 ISC/ISL engines?
Mechanical interface is compatible, but thermal management and emissions coordination may not align. Refer to the engine manual for selection.
3. What components should be replaced simultaneously when installing 4934058?
Replace gaskets, seals, and drive belts. Inspect the thermostat and hoses; replace if aged.
4. Are there standards for installation torque and belt tension?
Water pump mounting bolts: 32±3 N・m. Pulley bolts: 28±2 N・m. Belt deflection should be 8-10mm when compressed.
5. What preparations are needed before installation?
Drain coolant after engine cools. Clean mounting surfaces (free of residue and rust). Verify new pump impeller rotates smoothly. Prepare torque wrench and sealant.
6. Should sealant be applied to the seal ring?
Apply a thin layer only. Excessive sealant may clog passages.
7. How to verify proper operation after installing a new pump?
Refill coolant to purge air, idle for 15-20 minutes. If water temperature stabilizes between 85-95°C with no leaks or abnormal noises, the pump functions correctly.
8. Can the water pump be removed/installed on a hot engine?
No. Risk of burns and compromised installation accuracy. Wait until the engine cools to ambient temperature.
9. How to extend water pump lifespan?
Use compliant coolant (replace every 2 years or 40,000 km), regularly check belt tension, and avoid prolonged high-load idling.
10. Does using incorrect coolant cause issues?
Yes. Avoid pure water or mixing different coolants, as this corrodes the pump body, causing leaks or blockages.
11. What signals indicate a failing pump?
Coolant leaks, high-temperature warning lights, bearing noise, pulley wobble, or metal particles in coolant.
12. Why does a new pump leak?
Inadequate mounting surface cleaning, loose bolts, damaged seals, improper sealant application, or pump manufacturing defects.
13. Does engine overheating always mean the water pump is faulty?
Not necessarily. It could also be caused by issues with the thermostat, radiator, or drive belt. Inspect the water pump to check if the pulley rotates normally and if there's a temperature difference between the inlet and outlet hoses.