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4.23. Piston rings - installation

1. Before installation of new piston rings it is necessary to check trailer and side gaps.

22.2 When checking a trailer gap of a piston ring it has to be established perpendicular to cylinder walls (for this purpose lower a ring deep into of the cylinder by means of the piston)


2.  Install the top compression ring in the first cylinder (22.2) and lower it in the bottom of the cylinder.

22:3á Measure a trailer gap of a ring by means of a set of probes


22:3í If the trailer gap is too small, clamp a file in a vice and grind off the ends of a ring (moving a ring on a file outside inside)


3. Measure a trailer gap by means of a set of probes (22.3a). If the gap is too small, get a ring from the cylinder and grind off its ends (22.3b). If the gap is too big, then check that it did not exceed 0,9 mm.
4. Similarly check a trailer gap of other rings.

22:5á Establish an expansion ring in a flute


22:5í Do not use the tool for installation of piston rings at installation of oil scraper rings


5. At installation of rings on the piston the oil scraper ring is established by the first. It consists of three elements. Establish an expansion ring in a flute (22.5a). Then fingers, without using the tool for installation of piston rings, establish the lower and top oil scraper rings (22.5b). Check that the top and lower ring smoothly moved in a flute.

22:6á Compression rings N 1 and 2 have different cross sections - do not mix them and establish by a mark up.

1. Marks
2. A surface with facets
3. Marks
4. The knocked-off edge


22:6í Establish compression rings by means of the tool for installation of piston rings - the mark (it is specified by an arrow) has to look up


6. Then by means of the tool for installation of piston rings establish the second compression ring in an average flute on the piston. It needs to be established by a mark up (22.6a and 22.6b).
Note. On engines 1.8L Turbo and 2.0L of the Cordia/Tredia models thickness of compression rings depends on engine type. You watch the following table.
Ring
Engine
Ring thickness
Identification mark
Top
1.8L
1,5 mm
T
2.0L
2,0 mm
N
Lower
1.8L
1,5 mm
2T
2.0L
2,0 mm
N
7. Similarly establish the top compression ring by a mark up. Do not mix the top and second compression rings.
8. Install rings on other pistons.