I-automobile injini ye-averhaul ifaka ngokufaka okunye esikhundleni sama-valve, ama-pistons, amasilinda amasilinda, ama-cylinders, njll.
Uma iketanga liphelelwe isikhathi, kuyadingeka ukushintsha i-time chain, umgadli, ngaphezu kwemishini yokugaya, i-camshaft kawoyela, futhi futhi kudingeka ungene esikhundleni se-averhaul packal, njll. Lungisa injini ukuqinisekisa ukusebenza kwenjini.