Description
The Detroit Diesel A4720780680 is a genuine OEM fuel injector line passthrough seal for DD13, DD15, and Mercedes OM471 engines, sealing the injector lines where they pass through the valve cover. Six seals are required per engine. This number supersedes A4720780480, A4720780180, and A4720780080. Sold individually — order quantity accordingly.
Signs You Need New Injector Line Seals
- Visible fuel seepage or wet spots around injector line connections at the valve cover
- Strong diesel fuel smell in the engine compartment
- Loss of fuel rail pressure or hard starting
- Active fault codes related to fuel system pressure or injector performance
Specifications
| Manufacturer | Detroit Diesel (Genuine OEM) |
|---|---|
| Part Number | A4720780680 |
| Supersedes | A4720780480, A4720780180, A4720780080 |
| Part Type | Fuel Injector Line Passthrough Seal |
| Engine Compatibility | Detroit DD13, DD15 / Mercedes OM471 |
| Length | 72 mm |
| Width | 40 mm |
| Quantity Per Engine | 6 |
| Sold As | Individual Seal |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: A4720780480, A4720780180, A4720780080
- PAI Industries: 631368
Applications
This injector line seal fits the following engines:
- Detroit Diesel DD13 12.8L (2008+)
- Detroit Diesel DD15 14.8L (2008+)
- Mercedes-Benz OM471 (rebadged DD15 architecture)
Representative vehicles using these engines:
- Freightliner Cascadia (2008-2024)
- Freightliner Coronado, 114SD, 122SD
- Western Star 4900, 5700XE, 6900XD
Verify your engine serial number before ordering. Six seals are required to complete an engine — order quantity accordingly.
