Description
Genuine Detroit Diesel OEM fuel check valve (23516919) for Series 60 engines. Installed in the fuel return line, this one-way valve keeps fuel in the cylinder head when the engine is shut off so injectors stay primed for fast restarts. Detroit also catalogs this valve as 23509140 and 23516916; PAI 645051 is the premium aftermarket equivalent.
Signs You Need a New Fuel Check Valve
- Hard starting or extended cranking after the truck sits overnight or longer
- Engine runs rough or misfires for the first minute after starting, then smooths out
- Fuel filter bowl empties or drops level when the engine is shut off
- Loss of fuel prime requiring multiple cranking cycles to start
Specifications
| Manufacturer | Detroit Diesel |
|---|---|
| Part Number | 23516919 |
| Part Type | Fuel Return Check Valve |
| Engine Compatibility | Detroit Diesel Series 60 (11.1L, 12.7L, 14.0L) |
| Inlet Connection | 3/8″ Female Pipe Thread |
| Outlet Connection | 3/4″-16 (8 SAE) Male Thread |
| Inner Diameter | 0.200″ |
| Hex Size | 0.87″ |
| Overall Length | 2.40″ |
| Condition | New, Genuine OEM |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: 23516919, 23509140, 23516916
- PAI Industries: 645051
Applications
This fuel check valve fits the following Detroit Diesel engines:
- Series 60 11.1L (1987-1995)
- Series 60 12.7L (1991-2007)
- Series 60 14.0L (2001-2011)
Representative vehicles using these engines:
- Freightliner Century Class, Columbia, Coronado, FLD (1991-2011)
- Peterbilt 379, 386, 387, 389 (1991-2011)
- Kenworth T600, T660, T800, W900 (1991-2011)
- International 9200, 9400, 9900 (1991-2007)
- Western Star 4900 (1991-2011)
- Prevost and MCI motorcoach chassis (1991-2011)
Multiple fuel pump configurations are used across Series 60 production. Verify the part number etched on your existing valve or confirm fitment via your engine serial number before ordering.
