If a repair has been carried out as indicated, replacing valve guides, their seals, it is to be assumed that the seats have been frequently freed to maintain a perfect closure, thus eliminating the decrease of oil by the upper part of the engine and that it is introduced into the combustion chamber. On the other hand, rectifying or directing the motor block cylinders and when new pistons are not mounted (still) it is very important to enclasquillar and align the motor rods to maintain perpendicularity with the crankshaft in its route between the upper and lower dead point, thus avoiding axial displacements of the pistons and therefore not guaranteeing an ideal closure of the segments which with all segments which with all segments which with all segments which with all Sugurity by adding the wear that old pistons have, together with this lack of segments, it is why the oil rises to the combustion chamber by expelling the oil by the exhaust.
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