Description
That diesel knock, rough idle, or hard starting might just be a leaking injector washer. This precision chrome-finished washer seals the critical junction between your fuel injector and cylinder head, preventing compression loss and fuel leaks that rob power and efficiency. With exact dimensions of 0.395" inner diameter and 0.83" outer diameter, it's the right fit for many Massey Ferguson, Ford New Holland, and Perkins diesel engines.
Key Features
- Precision-machined with 0.395" ID and 0.83" OD for exact fit
- Chrome finish resists corrosion from fuel and combustion gases
- Fits wide range of MF, Ford NH, and Perkins engines
- Seals injector to prevent compression and fuel leaks
- Critical for proper injector spray pattern and engine performance
Small Part, Big Impact on Performance
Injector washers live in one of the harshest environments in your engine - exposed to extreme heat, pressure spikes with every combustion cycle, and diesel fuel that can degrade inferior materials. When these washers fail, you'll notice symptoms like white smoke on startup, fuel odor around injectors, hard starting, or that telltale "chuffing" sound of compression escaping. This quality replacement restores the seal, bringing back smooth running and full power.
Why Chrome Matters
The chrome finish isn't just for looks - it provides superior resistance to the corrosive effects of combustion gases and diesel fuel. Standard copper washers work, but chrome-finished washers last longer and maintain their sealing properties through more heat cycles. The precise dimensions ensure proper injector protrusion into the combustion chamber, critical for spray pattern and complete combustion. Too thick and injectors sit too high; too thin and they sink too deep.
Installation Tips for Best Results
Always replace injector washers when removing injectors - reusing old washers almost guarantees leaks. Clean the injector seat thoroughly before installation, removing any carbon buildup or old washer material. This washer's 0.395" inner diameter and 0.83" outer diameter must match your application exactly - measure carefully or verify part numbers. Install dry without sealants - the precision fit and chrome surface create the seal. Torque injectors to specification to avoid crushing the washer. Pro tip: If replacing one injector, consider doing all - when one washer fails, others are usually close behind. Mark installation date on your maintenance log; injector washers typically last several years but should be inspected during any injector service.