Description
This is a complete 6-cylinder injector tube (sleeve) and O-ring set for Detroit Diesel DD13 and DD15 engines, packaging six PAI 692090 injector tubes (Detroit A4720780273) and six PAI 621248 O-rings (Detroit A0249976445) — enough soft / hard parts to reseal all six injector bores when the head is off the engine. The injector tube is the stainless-steel sleeve pressed into the cylinder head that isolates the injector from the coolant jacket.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Type | Injector Tube + O-Ring Set (6-pack) |
| Engine Compatibility | Detroit DD13, DD15 |
| Tube Material | Stainless Steel |
| Tube Length | 3.347 in (~85 mm) |
| Tube OD | 34.60 mm |
| Tube Thread | M16 x 1.5 |
Kit Includes
- Injector tube / sleeve — PAI 692090 (OEM Detroit A4720780273) (qty 6)
- Injector tube O-ring — PAI 621248 (OEM Detroit A0249976445) (qty 6)
Cross References
This injector tube and O-ring set replaces or is equivalent to the following part numbers:
- Detroit Diesel: A4720780273 (injector tube), A0249976445 (O-ring)
Applications
This injector tube + O-ring set fits the following engines:
- Detroit DD13 12.8L
- Detroit DD15 14.8L
Representative vehicles using these engines:
- Freightliner Cascadia, Coronado, M2 (DD13 / DD15)
- Western Star 4700 / 5700 (DD13 / DD15)
Tube replacement requires removing the cylinder head and is generally performed during overhaul. The tube is interference-fit; verify your service procedure and torque/install spec before removing the OEM tube. Each injector also requires its install kit (PAI 621245 or equivalent).
