Iji dochie ihe nzacha mmanụ:
1. Wepu plọg mmiri ma kpochaa mmanụ engine.
2. Hichaa plọg mmiri ahụ ma mechie ya.
3. Jiri ihe nzacha mmanụ na-atọpụ ihe nzacha mmanụ ma wepụ ya.
4. Tinye mmanụ injin na mgbanaka O{1} na nzacha mmanụ.
5. Gbanye na nzacha mmanụ ọhụrụ.
Akpachara anya maka dochie nzacha mmanụ:
1. Jiri nzacha nzacha ma ọ bụ ngwaọrụ ọzọ dabara adaba mgbe ị na-ewepụ ihe nzacha mmanụ ka ị ghara imebi eri.
2. Gbanwee mmanụ mmanụ na mmanụ mmanụ n'otu oge iji gbasaa ndụ nke engine.
3. Akwụsịla ihe nzacha ahụ iji gbochie mmebi nke gasket.
