Umwuka w’umwotsi wubururu uterwa namavuta arenze mu cyumba cyaka. Impamvu zo kunanirwa ni izi zikurikira:

1) Isafuriya yamavuta yuzuyemo amavuta. Amavuta menshi azasesekara kurukuta rwa silinderi hamwe na crankshaft yihuta cyane no mucyumba cyaka. Igisubizo nuguhagarika iminota 10, hanyuma ugenzure amavuta ya dipstick hanyuma ukureho amavuta arenze.

2) Ibikoresho bya silinderi nibikoresho bya piston byambarwa cyane kandi gusiba ni binini cyane. Niba icyuho ari kinini, amavuta menshi azinjira mucyumba cyo gutwika kugira ngo yaka, kandi icyarimwe, gaze ya gaze ya moteri ya moteri iziyongera. Uburyo bwo kuvura nugusimbuza ibice byambarwa mugihe.

3) Impeta ya piston itakaza imikorere yayo. Niba ubworoherane bwimpeta ya piston budahagije, ububiko bwa karubone bwomekwa kumurongo wimpeta, cyangwa ibyambu byimpeta biri kumurongo umwe, cyangwa umwobo wo gusubiza amavuta impeta ya peteroli urahagaritswe, amavuta menshi azinjira muri icyumba cyo gutwika no gutwika, kandi umwotsi w'ubururu uzasohoka. Igisubizo nugukuraho impeta ya piston, kuvanaho ububiko bwa karubone, kugabana ibyambu byimpeta (ibyambu byo hejuru no hepfo byerekana ko byadindizwa na 180 °), hanyuma bigasimbuza impeta za piston nibiba ngombwa.

4) Ihanagura hagati ya valve numuyoboro ni munini cyane. Kubera kwambara no kurira, ikinyuranyo cyombi ni kinini cyane. Mugihe cyo gufata, amavuta menshi mubyumba byamabuye ya rocker yinjizwa mucyumba cyaka kugirango yaka. Igisubizo nugusimbuza valve yambarwa numuyoboro.

5) Izindi mpamvu zitera umwotsi wubururu. Niba amavuta ananutse cyane, umuvuduko wamavuta ni mwinshi, kandi moteri idakora neza, bizatera amavuta gutwika no gusohora umwotsi wubururu.