Description
PAI Industries 421222 injector seal and o-ring kit for International DT466E and DT530E HEUI engines (1993–2003). Aftermarket replacement for Navistar 1830742C92 (supersession of 1830742, 1830742C91) — the external sealing set installed when an injector is pulled, reinstalled, or replaced. Six kits are required per engine for a complete six-injector service.
Signs You Need New Injector Seals
- Fuel leak around an injector hold-down or pour-back line
- Engine oil contamination of fuel (HEUI rail) or fuel in oil
- Rough idle, misfire, or hard start after recent injector R&R
- Black smoke under load tied to a single cylinder
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 421222 |
| Part Type | Injector Seal and O-Ring Kit (external) |
| Engine Compatibility | International DT466E, DT530E (1993–2003) |
| Quantity Required | 6 kits per engine for full set |
Cross References
This part replaces or is equivalent to the following part numbers:
- Navistar: 1830742, 1830742C91, 1830742C92
- Interstate McBee: MCBS0008
- Mack: 4333-1830742C92
Applications
This injector seal kit fits International DT466E and DT530E HEUI engines (1993–2003). Representative vehicles:
- International 4700, 4800, 4900 (1993–2003)
- International 3000, 3600, 3800 school / commercial bus chassis (1993–2003)
- International 4300, 4400 (1993–2003)
- International 5000, 5500, 5600, 7300, 7400, 7500 (1993–2003)
- International 8100, 8300 (1993–2003)
Verify your engine model and ESN before ordering — later DT466 / Maxxforce DT (2004+) and the mechanical DT466 use different injector sealing systems.
