Lo mhlangano wompompi kawoyela wenziwe ngensimbi ye-aluminium yekhwalithi ephezulu, futhi unesihlungi sikawoyela esinemashebhisi esiqinile. Isihlungi sihlunga kahle ukungcola okusekawoyeleni wenjini ukuze kuvinjelwe ukuguga kwezingxenye zangaphakathi. Inikeza umfutho kawoyela ozinzile kanye nokugcoba okuqhubekayo ezingxenyeni ezinyakazayo zenjini, inokusebenza kahle kokuvimbela ukuvuza kanye nempilo yesevisi ende. Ikhiqizwe ngokuqinile ngokwezindinganiso ze-OEM, iyingxenye yokushintsha ekahle yokulungisa nokunakekela injini yemoto.