Karshe injin tabarma Waɗannan yawanci abubuwan da ke haifar.

Abubuwan da ke haifar da rikice-rikice na piston sun karye daga zoben Piston: ban da lahani na kayan aiki da ingancin kwayar halitta, kulawa mara kyau da taro sune manyan dalilai.

Overlap sharetacce.

Lokacin da aka ba da izinin karewa fiye da wanda aka ba da izinin Majalisar Dindila, ya bar karancin dakin fadad da ƙarfe a wasikun. Wannan yana haifar da ƙarshen overlap don lanƙwasa a kan juna da kuma karye kusa da abin da ya shafa.

Carbon adon a cikin zobe tsagi.

Rashin daidaito, overheating na silinshin silima, oxidation na lubricating mai a cikin adiban adon carbon a cikin silinda. Mai tsananin carbon suna hana motsi na hana haduwa tsakanin zobe da bangon silinda. Scracked lubricating mai hade da karfe kwakwalwan kwamfuta, da siffofin gas da siffofin gas da ke karkatar da adon carbon a kan ƙananan ƙarshen tsagi na zoben zobe. Za a iya amfani da adon carbon a ƙasan ajiya na piston na iya shafar matsakaicin zobe na lokaci-lokaci, yana haifar da zoben piston na lokaci-lokaci don karya gajiya saboda lanƙwasa gajiya.

Matsalar ƙwallon ƙafa na dogon lokaci tsakanin Majalisar Silinda na iya haifar da na'urar silima don slab a saman farfajiyar silinda. Lokacin da piston ya kai matakin da ya mutu, zoben firikar farko na piston na farko ya buge tebur nagin, karya saboda tasirin.

Wuce kima da tsakar zobe

Yawansu na ƙananan ƙarshen ƙarshen tsararren zobe yana haifar da shi ya zama tulled (flared). Lokacin da Piston yana kusa da babban wuri na farko, matsawar gas mai karfin gas don latsa a kan tsirarun ƙarshen ƙarshen tsagi, yana haifar da zoben Piston don gurbata.