(1) Nchikota gia dị oke ma ọ bụ pere mpe.
(2) Ebe dị anya n'etiti oghere crankshaft isi na oghere camshaft na-agbanwe n'oge eji ma ọ bụ nrụzi, na-ebuwanye ibu ma ọ bụ obere; ahịrị crankshaft na camshaft center adịghị n'otu, na-ebute meshing gia na-adịghị mma.
(3) Nhazi ezighi ezi nke profaịlụ eze gia, nrụrụ n'oge ọgwụgwọ okpomọkụ ma ọ bụ oke iyi n'elu eze;
(4) Gear ntụgharị - Oghere dị n'etiti gnawing gaps na gburugburu abụghị otu ma ọ bụ undercut emee;
(5) Enwere scars, delamination ma ọ bụ ezé gbajiri agbaji n'elu eze;
(6) Ngwa ahụ na-atọhapụ ma ọ bụ pụọ na crankshaft ma ọ bụ camshaft;
(7) Gear ọgwụgwụ ihu okirikiri runout ma ọ bụ radial runout bụ oke ibu;
(8) Mwepu axial nke crankshaft ma ọ bụ camshaft buru ibu;
(9) The gia na-adịghị dochie na abụọ.
(10) Mgbe dochie crankshaft na camshaft bushes, gia meshing ọnọdụ gbanwere.
(11) The camshaft timing gear fix nut is tọrọ atọ.
(12) Ezé nke camshaft oge gia agbajiela, ma ọ bụ ngwo-agbajikwa na radial direction.