Injector sleeves are critical components in diesel engines, designed to ensure the proper function and longevity of fuel injectors. They seal the injector from engine coolant and combustion gases, preventing leaks that could damage the engine or reduce efficiency. By protecting the cylinder head from heat and erosion, they help maintain structural integrity under extreme operating conditions. Injector sleeves also position the injector correctly, ensuring precise fuel spray for optimal combustion. These sleeves are most commonly used in diesel engines found in cars, trucks, tractors, and heavy equipment, particularly in setups where injectors are mounted directly in the cylinder head and exposed to high heat and pressure. They are typically made from brass, copper, or steel, materials chosen for their combination of heat resistance, durability, and sealing ability.
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