He mowhiti whakarewa te Mowhiti Piston kua whakaurua ki roto i te awaawa piston. E rua ngā momo mowhiti piston: te mowhiti kōpeketanga me te mowhiti hinu. Ka taea te whakamahi i te mowhiti kōpeketanga hei hiri i te hau ranunga mura i roto i te rūma mura. Ka whakamahia te mowhiti hinu hei waru i te hinu taikaha mai i te rango.
Ko te mowhiti piston he momo mowhiti whakarewa rapa, he nui te āhua whakawhanui ki waho. Ka huihuia ki roto i te awaawa porowhita e rite ana ki te kōtaha. Ko ngā mowhiti piston hurihuri me te hurihanga e whakawhirinaki ana ki te rerekētanga pēhanga i waenga i te hau, i te wai rānei hei hanga hiri i waenga i te porowhita o waho o te mowhiti me te rango, me tetahi taha o te mowhiti me te awaawa.
Ko te mowhiti piston te wāhanga matua o te miihini wahie. Ka hiritia te hau wahie me te rango, te piston me te pakitara rango. E rua ngā momo miihini motuka e whakamahia whānuitia ana, arā, te miihini diesel me te miihini penehīni, nā te rerekētanga o te mahi wahie, kāore i te ōrite te whakamahinga o ngā mowhiti piston, mā te whakarewa i te mowhiti piston o mua, engari nā te whanaketanga o te hangarau, i whānau mai te mowhiti piston maitai kaha teitei, ā, nā te whakapai tonu i te mahi a te miihini, ngā whakaritenga taiao, he maha ngā tono maimoatanga mata matatau, pērā i te rehu wera, te whakakikorua hiko, te whakakikorua chrome, te hau hau, te whakatakotoranga tinana, te paninga mata, te maimoatanga konutea me te manganese phosphating, kia tino pai ake ai te mahi a te mowhiti piston.
