I-cylinder pad, eyaziwa ngokuba yi-cylinder liner, iphakathi kwentloko ye-cylinder kunye ne-cylinder block. Umsebenzi walo kukugcwalisa i-microscopic pores phakathi kwentloko ye-cylinder kunye nentloko ye-cylinder, ukuqinisekisa ukutywinwa kakuhle kwindawo edibeneyo, kwaye emva koko kuqinisekiswe ukutywinwa kwegumbi lokutsha, ukukhusela ukuvuza komoya kunye nejacket yamanzi ukuvuza kwamanzi. Ngokutsho kwezixhobo ezahlukeneyo, i-cylinder gaskets inokwahlulwa ibe yintsimbi - i-asbestos gaskets, isinyithi - i-gaskets edibeneyo kunye nazo zonke i-gaskets zetsimbi. Iphedi yesilinda sisitywina phakathi komphezulu womzimba kunye nomzantsi wentloko yesilinda. Indima yalo kukugcina i-cylinder seal ingavuzi, gcina i-coolant kunye neoli ephuma emzimbeni ukuya kwintloko ye-cylinder ayivuzi. I-cylinder pad ithwala uxinzelelo olubangelwa ukuqiniswa kwentloko ye-cylinder bolt, kwaye ixhomekeke kubushushu obuphezulu kunye noxinzelelo oluphezulu lwegesi evuthayo kwi-cylinder, kunye nokubola kweoli kunye ne-coolant.
I-gaspad iya kuba namandla aneleyo kwaye iya kuxhathisa ukuzonwabisa, ubushushu kunye nokuhlwa. Ukongeza, umlinganiselo othile we-elasticity uyafuneka ukuhlawulela uburhabaxa kunye nokungalingani komphezulu womzimba kunye nomgangatho ophantsi wentloko ye-cylinder, kunye nokuguqulwa kwentloko ye-cylinder xa injini isebenza.