2. Before installing the rings on the pistons, check their ring gaps as follows.
3. Lay out the piston/connecting rod assemblies and new ring sets on a clean work surface so that related components are together. Place the cylinder block on the workbench so that you can access the top and bottom of the cylinders.
4. Insert the top ring into the first cylinder and align it by lightly pressing it with the piston head. The ring should sit at the base of the cylinder, near the lower limit of the piston stroke.
5. By pushing the feeler gauges into the space between the ends of the ring, select a suitable one, the thickness of which is equal to the gap (see illustration). The probe should enter the gap with a small resistance. Compare the measurement result with the data given in Specifications. If the gap size is outside the permissible tolerances, make sure once again that this ring should be in this particular cylinder.
6. If the gap is too small, it must be increased, otherwise the ends of the ring will rest against each other during engine operation, which will lead to engine damage. Carefully file the ends of the ring with a fine file, clamping the file in a vice with jaws equipped with soft pads. File only the end surface of the ends of the ring. Repeat the procedure on the remaining rings. Do not mix rings from different pistons and do not confuse pistons; keep them near the corresponding cylinder at all times.
7. Once the ring lock clearances have been checked (and corrected if necessary), the rings can be installed on the pistons. Start installation from the lowest groove (oil scraper ring). Please note that the ring consists of two working parts separated by a spacer part (middle part of oil scraper ring). Note also that the two compression rings have different profiles and must be installed in their respective grooves using a special tool. Both compression rings have marks indicating their top side (see illustration).
8. Position the ring locks so that they are 120° apart.
Note: Please follow the instructions printed on the ring set packaging carefully.
This article was previously published on the resource: AUDIMANUAL.RU