Ikhithi yokucoca i-oyile ye-aluminiyam sisixhobo esisetyenziselwa ukutshintsha isihluzo se-oyile kwi-injini yemoto. Le khithi idla ngokubandakanya i-wrench, eyenziwe nge-aluminium, yokukhupha kunye nokufaka i-oyile filter. Izinto ze-aluminiyam zenza ukuba i-wrench ibe lula kodwa yomelele ukuze isetyenziswe xa utshintsha izihluzi zeoyile. Ezi zixhobo ziyilelwe ukuba zilungele uluhlu olubanzi lweesayizi zokucoca ioyile kunye neentlobo, ukwenza utshintsho lokucoca lube lula kwaye lusebenze ngakumbi. Iikiti ze-aluminiyam yesihluzi se-oyile zihlala zinobususa obulungileyo bobushushu, zikhangeleka zintle, kwaye kulula ukuzicoca nokuzigcina.
Iikiti ze-aluminiyam zokuhluza i-oyile ziqhele ukusetyenziswa endaweni yokucoca ioyile kwiinjini zeemoto. Iimpawu zezixhobo ezinjalo ziquka:
Ngokubanzi, iikhithi zokucoca i-oyile ye-aluminiyam zigqwesa ukuqina okukhaphukhaphu, ukutshatyalaliswa kobushushu kunye nokulungelelana okuchanekileyo, kubenza babe sisixhobo esiluncedo xa kusenziwa utshintsho lwe-oyile.