Nthawi zina, zizindikirozi zimayikidwa chifukwa cha kuchuluka kwa unyolo. Kuchulukirachulukira mu unyolo kumapangitsa nthawi kuyendayenda ndikubwerera pomwe kompyuta ikuyesera kuyiyika pamalo oyenera. Kuphatikiza pa unyolo wotayirira nthawi mutha kukhalanso ndi zovuta ndi ma cam phaser sprockets.

Ma cam phaser sprockets ali ndi magawo awo omwe amasuntha mkati. Apa ndipamene nthawi yosinthika ya valve imabwera. Kutha kutembenuza cam phaser kumapangitsa kompyuta kuti isamange nthawi ya camshaft. Magalimoto akalephera kuwongolera nthawi yake, sikuti amangoyika nambala yowunikira injini, koma amatha kukhala ndi injini yovuta komanso kusowa mphamvu.

Timapeza zabwino zingapo pogula zida za nthawi zonse kuphatikiza kusunga ndalama. Sikuti amangophatikiza unyolo ndi magiya amaphatikizanso zowongolera nthawi ndi maupangiri. Kupita ndi unyolo wathunthu wa nthawi kungakuthandizeni kupewa kubwereza zolephera panjira.