CPR Water Outlet Tube
Product Description
The water outlet tube is a critical coolant pathway component in Cummins engines, connecting the cylinder head to the radiator or heat exchanger. A poor fit here causes leaks, overheating, and downtime. That’s why we supply fully compatible, OEM-grade water outlet tubes across B, C, L, ISX, QSK, QSM, and QSB series.
Whether you’re servicing a marine engine, generator set, excavator, or commercial truck, we ensure a reliable, exact-fit solution—built for harsh environments and long operating hours.
Pre-Sales Service
After-Sales Service
Transaction Information
Compatibility & Engine Fitment
We support a wide range of compatibility across Cummins engines:
| Engine Series | Displacement | Common Uses | Part Numbers (Examples) |
| B Series | 3.9L, 5.9L | Excavators, gensets, trucks | 3906698, 3914086 |
| ISB / QSB | 5.9L, 6.7L | Loaders, buses, marine | 3974820, 5346206 |
| C Series / ISC / QSC | 8.3L | Power gen, industrial | 3930879, 3972592 |
| L Series / ISL / QSL | 8.9L | Fire pumps, cranes, and vessels | 4946031, 4940879 |
| ISX / QSX | 15L | Mining, freight, rail | 3686372, 3686374 |
| K / N / M / QSM | 11L–19L+ | Marine, oil & gas rigs | Contact us for PNs |
✅ Don’t see your engine? Share your Engine Serial Number (ESN) or CPL, and we’ll confirm compatibility within 1 business hour.
Key Features
- Exact OEM Geometry – No modification or rework required
- High-Flow Coolant Channels – Maintains thermal balance under high load
- Marine-Grade Corrosion Protection – Stainless steel options for saltwater exposure
- Custom Ports Available – Sensor integration, threaded, or flanged
- Compatible with EGR & Non-EGR Setups – Designed for both Tier 1–Tier 4 engines
Specifications (Typical Range)
| CPR WATER OUTLET TUBE | ||
| 4934668 | 3014451 | 3287208 |
| 4944933 | 3000285 | 3287408 |
| 3960067 | 3015115 | 3287414 |
| 3960572 | 4061380 | 3287416 |
| 3960674 | 130118 | 3415360 |
| 3960893 | 139433 | 3415473 |
| 3287204 | 208141 | 3415592 |
| 3287206 | 3287428 | 3415666 |
Applications by Sector
| Sector | Common Equipment |
| Marine | Propulsion, cooling for Cummins KTA, QSK, QSM, ISL engines |
| Power Gen | Cummins-powered gensets in continuous or standby mode |
| Construction | Loaders, excavators, dumpers with B/C/ISL/ISX engines |
| Mining/Oil | Rigs & stationary systems using QSK19, QSM11, N14 platforms |
| Transport | ISX/ISB-powered trucks and logistics vehicles |
Fitment Support & Customization
Warranty & Support
- Drop-in Compatibility – Matches OE flange, bolt pattern, and hose connection
- Custom Tube Routing – We support reversed coolant flow and tight clearances
- Flanged or Straight-End Options – Based on radiator/hose setups
- Bulk Supply & Private Label – For service networks or fleet contracts
Need a drawing or spec sheet? Ask our engineering team—response within 1 business day.
- 12-Month Warranty or 1,000 Operational Hours
- CAD Drawings & Installation PDF upon request
- Bulk Export Packaging – Palletized, branded, or neutral
- No-Hassle Return & Exchange Policy
- Direct Engineer Support – Not just a sales agent
