Description
Water pump kit that replaces Cummins 3683651, 3684449, and 5406043 on Cummins ISX 15.0L engines. The PAI 181929 ships with a 12-rib serpentine pulley and the install O-ring sized for the ISX flush-mount pump cavity, providing OEM-equivalent sealing on Signature, ISX, and ISX15 accessory drives.
Signs You Need a New Water Pump
- Coolant leaking from the weep hole or pump-to-block gasket area
- Coolant on the ground beneath the front of the engine
- Whining, growling, or grinding noise from the front of the engine
- Excessive shaft play or wobble at the pulley
- Engine overheating or coolant temperature rising under load
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 181929 |
| Part Type | Water Pump Kit |
| Pulley | 12-Rib Serpentine |
| Mount | Flush Mount, Plane EGR Mount Surface |
| Engine Compatibility | Cummins ISX 15.0L (Signature, ISX, ISX15) |
| Warranty | 2-Year (PAI Factory) |
Kit Includes
- Water pump assembly (12-rib pulley)
- Installation O-ring
Cross References
This part replaces or is equivalent to the following Cummins part numbers:
- Cummins: 3683651, 3683652, 3684449, 3684450, 3687130, 4386570, 4386576, 5406043
Applications
This water pump fits the following engines:
- Cummins Signature 600 15.0L
- Cummins ISX 15.0L
- Cummins ISX15 15.0L
Representative vehicles using these engines:
- Kenworth T600, T660, T680, T800, W900
- Peterbilt 379, 386, 387, 389, 567, 579
- Freightliner Classic XL, Coronado, Cascadia
- International ProStar, LoneStar
- Volvo VNL
- Western Star 4900, 5700XE
Verify your engine serial number, accessory drive belt count (12-rib), and pump mount surface before ordering to confirm fitment.
