TOYOTA 23654-64010 Injector Leak-Off Pipe Washer

This genuine TOYOTA (SKU: 23654-64010) injector leak-off pipe washer is a premium quality OEM component that plays a vital role in the safe, leak-free operation of diesel fuel supply systems. The leak-off pipe washer (sealing ring) provides a reliable seal at the fuel injector return line (leak-off pipe), preventing diesel fuel from escaping into the engine bay.

Technical Features and Function

The injector leak-off pipe washer must withstand continuous temperature fluctuations, engine vibration, and the chemical effects of diesel fuel. Genuine Toyota parts are manufactured to strict tolerances, ensuring precise fitment and long service life.

• Excellent Sealing Performance: Prevents fuel returning from the injection system from leaking.
• Material Quality: Manufactured from a specialized, annealed metal alloy (typically copper or aluminium) that conforms precisely to the mating surfaces when the retaining bolt is torqued, providing a microscopic-level seal.
• Thermal and Chemical Resistance: Resists the operating temperatures of the engine block and the corrosive properties of diesel fuel.

Signs of Failure or Wear

Sealing washers are single-use components. Every time the leak-off pipe or an injector is removed, the washers must be replaced with new genuine parts. A worn or improperly sealing washer can cause the following issues:

• Diesel fuel leakage around the fuel injectors and the cylinder head.
• Strong fuel odor in the engine compartment that may penetrate the passenger cabin.
• Air ingress into the fuel system, leading to starting difficulties or rough engine idling.
• Soot and carbon build-up in the injector recess due to compromised sealing.

Product Specifications

• Manufacturer: TOYOTA (Genuine OEM part)
• Part Number (SKU): 23654-64010
• Part Name: Injector Leak-Off Pipe Washer (Washer, Nozzle Leakage Pipe)
• Fitting Position: Fuel return system, injector leak-off pipe connection