Description
PAI Industries 650656 oil temperature sensor for Detroit Diesel Series 60 (11.1L, 12.7L, 14.0L) engines. Aftermarket replacement for Detroit 23518092 (with later supersession 25036693) and Peterbilt Q21-1002. Two-pin oval Packard / Metri-Pack connector, threaded into the oil-cooler housing or galley to feed engine oil temp to the DDEC ECM.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 650656 |
| Part Type | Engine Oil Temperature Sensor |
| Engine Compatibility | Detroit Series 60 (11.1L / 12.7L / 14.0L) |
| Connector | Oval, 2-pin |
| Color / Finish | Gold / black |
| Weight | 0.08 lb |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: 23518092, 25036693
- Peterbilt: Q21-1002
- Automann: 577.75507
Applications
This sensor fits the engine oil temperature port on Detroit Series 60 engines:
- Detroit Series 60 11.1L (1987–1990s)
- Detroit Series 60 12.7L (1991–2007)
- Detroit Series 60 14.0L (1999–2007)
Representative vehicles using these engines: Freightliner FLD120, Century, Columbia, Coronado; Kenworth W900, T800, T660; Peterbilt 379, 386, 387, 389; Western Star 4900; Volvo VN/VNL with Detroit option.
Verify the sensor location (oil temp vs. coolant temp vs. fuel temp) before ordering — Series 60 uses several similar 2-pin oval-connector sensors at different ports.









