how to calibrate valves from a 7AFE or a 4AFE

Hello, I have a 7AFE that readjus a few months ago but I believe that the valves confused this produces a somewhat strong diesel engine but not so strong and is not so economical.
Please I need help me with the trem of the valve calibrada because I have not found clear information or precise instructions ....
Thank you ..

That brings chauchas truth '? That is, as rounds that are placed on the cups, well if so you must put the filler between the chaucha and the camo, obviously driving the valve and there are calibers, if the game is much it is not regulated, the file is changed for another of the desired thickness is laborious and you must have a considerable amount of lucky chips.

I'm going to try to do that .. but I'm going to try the chips I already have, I hope to find the 2 chips that I suppose, I confuse ...
Thank you very much Kikemec