Prevention
In order to avoid breakages of cutting edges and jamming of development it is necessary to limit the moment enclosed to development. Previously it is necessary to clear carefully openings of plugs of a deposit and resinous deposits. Not to press strongly on development.
Valves with the increased diameter of a core can be established in the Engine at plant. Plugs and valves with are increased ми in the sizes have special marking (see fig. Expansion of openings of plugs). |