When the
Piston rings are to be replaced with new ones, the ring/ end gap has to be set, provided that the piston ring side clearance has been established to be correct. Position the piston/connecting rod assemblies and the new ring sets in a manner that each piston and cylinder are asigned will be matched during the end gap measurement and the engine assembling. Place the top ring into the first cylinder with the intent of aligning the ring to the cylinder wall by pushing it in by using the top of the piston while the ring is placed at the lower end of the cylinder. A method of determining the end gap is to carefully put feeler gauges between the ends of the ring and to choose the thickness of the feeler gauge of the width of the gap such that it moves with slight friction. If the gap is too small, the gap should be made larger to allow the ends of the ring separated as the engine operates; failure to do this may cause serious damage. This can be done by filing the ring ends with fine file, while seeing to it that most of the material is removed by moving the ring to the outer end of the file and the vise. Excessive end gap is not fatal in a situation it goes beyond the limit; check the ring type and specifications twice. Do the same for the first ring and the second ring in each cylinder and consequent cylinders PISTON no. 2 RINGS no. 2 CYLINDERS no. 3 RINGS no. 3 CYLINDERS no. When this is done, fit the rings onto the pistons; the oil control ring has three parts; the rail, the scraper, and the expander. Insertion of the spacer/expander into the groove can effectively be made without the need for the piston ring installation tool, and if in this type there is an anti-rotation tang, the tang ought to be fitted into the hole drilled in the ring groove. The upper side rail should be put into the groove with the help of a finger and push it and the lower side rail was done in the same way. When you have put all the three bands of oil ring, ensure that both the side rails are capable of rotating freely within the grooves. After that, set the middle ring in a correct manner and make it a point not to keep it side by side with the top ring which has a different cross-sectional view. Fit the middle elastomer ring with a piston ring installation tool placing it into the groove with the identification mark at the top of the piston and without expanding the ring too much. Next, for the final piston ring, place it in as well while having the mark facing upwards, do this for all the pistons and rings.