Bonnet, nke a makwaara dị ka mkpuchi, bụ akụkụ ahụ a na-ahụ anya na otu akụkụ nke ndị na-azụ ụgbọ ala na-elekarị anya. Ihe kachasị mkpa maka mkpuchi engine bụ mkpuchi okpomọkụ, ụda ụda, ịdị arọ dị arọ na siri ike siri ike.
Ihe mkpuchi nke engine bụ n'ozuzu ihe mejupụtara ihe owuwu, sandwiched na ihe mkpuchi okpomọkụ, na efere dị n'ime na-arụ ọrụ nke ike siri ike. A na-ahọrọ geometry ya site n'aka onye nrụpụta, nke bụ isi ọkpụkpụ. Mgbe a na-emeghe bonnet, a na-atụgharịkarị azụ azụ, ma obere akụkụ ya na-atụgharị n'ihu.
Ekwesịrị imeghe mkpuchi injin tụgharịrị n'akụkụ akụkụ a kara aka ma ghara ịdị na kọntaktị na windshield n'ihu. Opekempe kwesịrị ịdị ihe dịka 10 mm. Iji gbochie imeghe onwe ya n'ihi ịma jijiji n'oge ịnya ụgbọ ala, n'ihu njedebe nke mkpuchi engine kwesịrị ịkwado ngwaọrụ mkpọchi nkochi nchekwa. A na-ahazi ngbanwe nke ngwaọrụ mkpọchi n'okpuru dashboard nke ụgbọ. Mgbe a na-emechi ọnụ ụzọ ụgbọ ala, a ga-ekpochikwa mkpuchi engine n'otu oge ahụ.
