Rings change in a 1.9 engine

Hello, I am new in the forum and oversight to greet all the members and congratulate them for this community that has formed, well I pass the following; I have a 93 tracer with engine problems is 1.9, the problems began with the power loss and motor vibration, then I started to throw a little smoke, according to a neighbor who is a mechanic said that you could be able to pack the head of the head a valbule and a change of rings, because it shows the spark plug 2 with oil, my question is, could someone provide me with the manual or the steps to make Thank you in advance.

hello good evening.
I tell you that I am a mechanic, but in particular your vehicle I have not repaired. I can tell you that I do not recommend that you make your work if you do not have the experience required is much the experience to have to get the work to be 100%. The engine is an element that is designed and manufactured with very high pressure standards to achieve the necessary power for displacement and any piece that is not in its position or does not have the parameters or tolerances of factory the work will be unsatisfactory. Anyway and to finish it is best to take it to a specialist to make a successful diagnosis and later reliable work.
luck...