Pic. 54. Marking the bottom of the pistons before removing them
- apply (preferably colored) markings for each piston (pic. 54) and the connecting rod related to it. It is necessary to indicate the number of the cylinder from which the piston and connecting rod were removed;
- draw an arrow (pic. 54) on the bottom of the piston, pointing to the front of the engine;
Pic. 55. Marking of the connecting rod and connecting rod bearing cap
Pic. 56. Assembling the connecting rod and connecting rod bearing cap. The arrows show the protrusions
- immediately after removing the piston with the connecting rod, mark the connecting rod and the connecting rod bearing cap on the side (pic. 55), indicating the number of the cylinder. Connecting rod and connecting rod bearing cap must be assembled with both cast lugs facing each other (pic. 56);
- mark the bearing shells in accordance with the connecting rod and connecting rod cap;
Attention! Both cast projections must always be located on the side of the crankshaft pulley after installing the connecting rod.
- color mark the upper and lower bearing shells on their rear side.
Remove the pistons as follows:
- remove the connecting rod caps and bearings and knock out the parts. If necessary, scrape off the oil deposits on the top of the cylinder with a scraper. To do this, turn the crankshaft slightly to lower the piston deeper into the cylinder bore. Be careful not to scratch the cylinder with the scraper;
Pic. 57. Removing the piston pin circlip
- using a sharp object or a small punch (pic. 57) remove the circlips located on each side of the piston pin. The notch in the piston pin hole makes it easier to use the punch;
- use a mandrel to knock out the piston pin. When hit, make sure that the mandrel does not pop out and hit the piston;
Pic. 58. Removing the piston ring with a puller
- mark the piston rings and remove them with a puller (pic. 58);
Pic. 59. Removing the piston ring with metal strips
- if there is no piston ring remover, then metal strips can be inserted under the piston rings opposite each other (pic. 59). Place one of the metal strips under the end of the piston ring to avoid scratches on the piston surface;
- remove the piston rings and tag them with the cylinder number. When inspecting the piston rings, make sure that one of the sides is marked «Oben» or «Top». When installing piston rings, this inscription must be visible from the side of the piston crown.
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