TOYOTA 11176-17010 Fuel Injector Nozzle Seat

Toyota part number 11176-17010 is an authentic OEM fuel injection nozzle seat (combustion seal washer), which is a critical sealing component of the diesel fuel delivery system. Its primary role is to ensure a reliable, gas-tight seal between the injector seat in the cylinder head and the fuel injection nozzle.

Operation and Technical Significance:

The sealing washer comes into direct contact with the extreme temperatures and peak combustion pressures of the combustion chamber. Its primary function is to prevent compression pressure loss and the escape of combustion products (blow-by) past the injector body. In addition, it plays a crucial role in conducting heat away from the nozzle tip into the cylinder head and sets the precise injector installation depth to ensure an optimal spray pattern. Seal failure (burn-through) can cause loss of compression and severe carbon build-up around the injector, typically accompanied by a rhythmic chuffing noise, hard starting, and reduced engine power output.

Technical Specifications:

• Part Type: Fuel Injector Nozzle Seat / Combustion Seal Washer (Seat, Injection Nozzle)
• Manufacturer: Toyota (genuine OEM part)
• Material: High heat-resistant, malleable sealing metal / copper alloy
• Fitting Position: Between the injector and the cylinder head
• OEM and Cross-Reference Numbers: 11176-17010, 2360017011, 2362417011

Vehicle Compatibility:

• Toyota Coaster (B20/B30) 4.2 TD [1990 - 1993] (1HDT engine code)
• Toyota Land Cruiser 80 (J80) 4.2 TD [1990 - 1992] (HDJ81, 1HDT engine code)