Nissan Sentra 1995 B-13

Consulta I have a 1995 B-13 Nissan Sentra, I have problems with the engine, the mechanic first told me that I had problems with the rings in the engine since it burns the oil, I am with a locomotive on Gran Humadera street, Bardal recommended me to stop having smoke, but for pleasure, today I get out that I must stop walking it since I can take the engine and talk to me about engine adjustment, will it really be really necessary ???? It will be that I can walk the car like this for at least one more month and then make the change of rings, since he told me previously that the compressions are fine, I handle it and strength has only the problem of the humadera, and today that he is making a sound like a blow that they recommend me ....

Hello Juan Carlos.
If the engine works at gas, as you comment that compression is well, generally the first thing they dry are valve seals and there is oil income to the cylinders, therefore it smokes a lot, it is recommended to check the seals, according to that result you can give a more accurate diagnosis.
In this case it has to do with the km that the vehicle has, type of fuel (gas or gasoline).

If it were only to smoke, it would not be so serious, the bardal is a patch but its effect lasts few km. In that type of additives I would recommend stp, of course the ideal is to repair the engine.
As for the comment on valve seals, it is a possibility, but usually, when the problem is those seals, the engine smokes the first minutes of march and then almost stop doing it.
As for feeling a blow to the engine, it is already more serious, if the blow is bolts or connecting rods, I would not walk a km more with the car.
A hug

As the companions tell you, if I can have the evil valve seals, it also slaughters in the guides of valve would have to look, another cause of the smoke (with oil smell) can be the breakage of some segment of grease, or some line in the cylinder ... despite being well of compression can be happening some of this, if you look at it the spark plugs can see which one you can see which one can see what is stained. Find the problem. In one way or another, this pod will force you to open the engine to see which of these things is happening. Greetings!

Greetings!
With all due respect my opinion.
Before thinking about opening an engine for me it is very important to determine.
visually, the color of the smoke. If it is black color, it is a fuel problem (delivery)
blue stamps or retainers in valves. taking into account a good compression.
On occasions it gives a white smoke that is completely normal this generally in cold climates