Beka iringi yepiston ibe mcaba kwicylinder, tyhala iringi caba ngepiston endala (xa utshintsha iringi ukwenzela ukulungiswa okuncinci, yityhale iye kwindawo apho umsesane olandelayo ushukuma uye kwindawo ephantsi), kwaye ulinganise isithuba sokuvula ngobungqimba. igeyiji.

Ukuba i-gap yokuvula incinci kakhulu, sebenzisa ifayile ecocekileyo ukuze ufake ifayile encinci ekupheleni kokuvula. Ukuhlolwa rhoqo kufuneka kwenziwe ngexesha lokulungiswa kwefayile ukukhusela ukuvula ukuba kukhulu kakhulu, kwaye ukuvulwa kufuneka kube flat. Xa ukuvuleka kweringi kuvaliwe kuvavanyo, akufuneki kubekho ukuphambuka; isiphelo esifayiliweyo kufuneka singabina burrs.

Jonga i-backlash, faka i-piston ring kwi-ring groove kwaye uyijikelezise, ​​kwaye ulinganise isithuba ngegeji yobukhulu ngaphandle kokukhupha ipini. Ukuba ucoceko luncinci kakhulu, beka intsimbi yepiston kwipleyiti eyisicaba egqunywe ngelaphu le-emery okanye ipleyiti yeglasi egqunywe ngevalve yesanti kwaye ucole.

Khangela i-backlash kwaye ubeke i-piston ring kwi-groove ye-ring, i-ring iphantsi kune-groove bank, ngaphandle koko i-ring groove kufuneka iguqulwe kwindawo efanelekileyo.