Igwe ntụtụ mmanụ ọkụ 0 460 424 298 bụ akụkụ anọ bụ isi mejupụtara ya: usoro mgbapụta mmanụ, usoro ngbanwe mmanụ ọkụ, usoro ịnya ụgbọ ala, na ahụ mgbapụta mmanụ mmanụ. Usoro mgbapụta mmanụ na-agụnye njikọ nke plunger, valvụ nnyefe mmanụ, wdg; usoro nhazi ụda olu na-enye mmanụ na-ezo aka na usoro nhazi olu mmanụ nke rack; Usoro ịnya ụgbọ ala gụnyere camshaft, akụrụngwa tappet, wdg; ahụ mgbapụta mmanụ ọkụ bụ ntinye nke matrix atọ dị n'elu.