![]() The injectors are “closed” by the piezo element itself, changing its size. Piezo injectors, intended for petrol engines, don’t have the spring anymore. The spring was comparingly “strong”, even wear of the moving parts or a micropart, stuck in the injector, were not able to keep the injector open. “Old type” injectors in a closed position were held by the spring. Piezo injector stucks in opened position – is such situation possible? In the image: the structure of piezo injectorġ. ![]() In the image: the structure of “regular” injector ![]() Till then – I will very make very simple calculations, is such hydro blow possible or not. To keep the intrigue, I will tell about my experience at the end of this entry. It’s clear, that the damages of such type can be very hard, with high possibility – the engine is irreversibly damaged. Fuel, leaked in the combustion chamber (which cannot be compressed as air or correct fuel mixture) can create hydro blow – connecting rod can be damaged, the piston, possibly, can be broken, the walls of the engine block can be damaged etc. I believe many of you have heard, that you have to be very careful from the situation if the piezo injector stucks in opened position – the engine can be irreversibly damaged. ![]()
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