Product Description
Cummins 3926761 — Engine Coolant Check Valve
MPN: 3926761 | Also Known As: coolant check valve, flow-direction valve | Function: Prevents coolant backflow to maintain proper flow direction
Why This Part
- ✓ OE fit & function for the 5.9L 12-valve cooling system.
- ✓ Prevents reverse circulation that can cause overheating or pressure issues.
- ✓ Durable construction to withstand heat and constant pressure cycling.
- ✓ Direct-fit replacement for quick service and reliable sealing.
Quick Specs
| Type | Engine coolant check valve |
|---|---|
| OE Part # | 3926761 |
| Qty Required | 1 per vehicle (sold individually) |
| System | Cooling system flow-direction control |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1994–1998 | Ram 5.9L Cummins 12-Valve | Ram 2500/3500 |
Industrial/Off-Highway: Used on various B-series applications; verify by ESN for non-automotive equipment.
Often Paired With
- Fresh coolant and new hose clamps
- Heater/coolant hoses if brittle or swollen
- Thermostat & gasket during cooling system service
What’s In The Box
- (1) Genuine Cummins Engine Coolant Check Valve (3926761)
- Hoses/hardware sold separately (see “Often Paired With”).
Install Tips
- Note flow direction before removal; install the new valve in the same orientation.
- Replace aged hoses/clamps and bleed air per service manual.
- Pressure-test and check for leaks after warm-up.
FAQ
WILL THIS FIT MY 1994–1998 5.9L 12-VALVE CUMMINS RAM?Yes—this is the OE coolant check valve for 1994–1998 Ram 2500/3500 with the 5.9L 12-valve (verify by VIN/ESN).
WHAT DOES THE COOLANT CHECK VALVE DO?It maintains proper coolant flow direction and helps prevent reverse circulation that can lead to overheating or pressure issues.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3926761 for factory fit and performance.
DO I NEED ANY OTHER PARTS?Inspect/replace related hoses and clamps; refill with fresh coolant and bleed the system after installation.
WILL THIS WORK ON INDUSTRIAL B-SERIES ENGINES?Many industrial B-series applications use this valve; always confirm by ESN for exact non-automotive fitment.
