Toyota Diesel 1KZ-TE 1HZ 2L 2L-TE 3L 5L 5L OEM Fuel System WASHER SET of (4) 23654-64010

• Perfect Fit: Genuine Toyota OEM part manufactured to precise dimensional tolerances — 19mm OD, 12mm ID, 1.0mm thickness — for a reliable crush seal at the injector ring packing connection
• Quality Assurance: Aluminum construction provides the correct crush and sealing characteristics needed at diesel injector leak-off connections — aftermarket alternatives frequently use incorrect materials or dimensions that lead to fuel weeping
• Performance: Maintains a fuel-tight seal at the injector nozzle ring packing, preserving injection system pressure and preventing diesel contamination in the engine bay
• Easy Installation: Straightforward consumable replacement — always install a new washer whenever injectors are removed; reusing old crush washers is a leading cause of post-service fuel leaks

Q: How many do I need for a full injector service?
A: Most Toyota 4-cylinder diesel engines (2L, 3L, 5L, 1KZ, 2C, etc.) have 4 injectors, so you will need 4 washers for a complete service. This listing is for a single washer — add 4 to your cart for a full set. If you are purchasing a 6-cylinder diesel such as the 1HZ or 1PZ, you will need 6.

Q: What is the difference between this washer and the injector nozzle seat washer or heat shield washer?
A: Toyota diesel injectors use multiple washers at different points. The ring packing washer (23654-64010) seals the leak-off/return connection at the top of the injector. The nozzle seat washer (11176-64010) seats the injector body in the cylinder head. The heat shield washer (11177-64010) sits below the nozzle tip to protect from combustion heat. All three are separate parts that must be ordered individually — do not substitute one for another.

Q: Can I reuse this washer if it looks undamaged?
A: No. This is a crush-type aluminum seal washer. It deforms slightly under torque to create a fuel-tight seal. Once crushed, it will not re-seal correctly, and reuse is a leading cause of fuel weeping after injector service. Always install a new washer.

Related Toyota Parts You May Need

• Injector Nozzle Seat Washer (11176-64010) — Seats injector body in cylinder head; replace at the same time for complete service on 2L/3L engines
• Injector Heat Shield Washer (11177-64010) — Protects injector tip from combustion heat; small crush washer below nozzle tip on 1KZ, 2L, 3L engines
• Injector Nozzle Leak-Off Return Pipe (23760-54030) — Replace the return pipe alongside the washers for a complete leak-off system service on 2L/3L/5L engines
• Glow Plug Set (19850-54090) — Service glow plugs simultaneously for complete cold-start reliability during any major injector work on 2L/3L diesel engines

Installation Difficulty: Beginner (as part of a broader injector service)
Tools Required: Standard injector removal tools, torque wrench, clean work surface
Professional Installation: Recommended as part of a complete injector service — the washer itself is straightforward, but proper injector removal and torque procedures require care

Maintenance Tips:

• Always replace this washer every time injectors are removed — it is a one-time crush seal and must never be reused
• Order one per injector (typically 4 for a 4-cylinder diesel engine) and replace the full set during any injector service
• Do not confuse this part with the injector nozzle seat washer (11176-64010) or the heat shield washer (11177-64010) — all three serve different sealing functions and are located at different points in the injector stack
• Torque injector hold-down hardware to Toyota specification after installing new washers to ensure correct crush and a fuel-tight seal

Part Type: Injector Ring Packing Washer / Injector Seal Washer (Fuel System)
Toyota Catalog Name: Washer (For Ring Packing)
Material: Aluminum (crush-type sealing washer)
Outer Diameter: 19.0 mm
Inner Diameter: 12.0 mm
Thickness: 1.0 mm