Nissan Sentra 1.8 QG18 engine of urgent help

Hello in principle, thank you for reading and helping, let's start with a month they brought me a 2001 1.8 Nissan Sentra 1.8 with a QG18 engine, which brought two problems one which is already solved that did not start I owed the tree censor and crankshaft and the second consumption and burning of oil which could not solve the first thing I did was ringing to be knocked out and bounds. (Head) The car was armed and the car followed but the Probblema turned to disassemble the engine, shirts were changed and nuvly rod rings of connecting rods and center and valve stamps came up again and started but continued to make blue smoke burning oil I decided to put an additive to the engine but anyway I continued burning oil for what I read the engine that there was a lot that there was a lot that had a bad What I would like to save how to solve this problem really I need your help I am stuck I will appreciate any comment or opinion that can give me thanks: Woohoo:

Look at the only ways to burn oil are the following:
1 by valve seals (others call them valve guide tapas)
2 by scratched cylinders
3 worn rings or poorly positioned
4 perforated pistons or in turn broken or trizarded

5
rings

that do not correspond to the measure of the cylinder or piston Once badly mounted what if you should do is first check a conpassion pressure on all cylinders and see which one that presents the leakage due to the loss of compression pressure, that must have oil inside or spark plugs, the following is to see if it is by cylinder or by cylinder

head Pressure loss (as a medium spoon reference with oil) and re -measure compression pressure, if it increases you work with the part of the cylinders, rings or pistons (to check that there is the fault) and if it is maintained you must check if it is due to lack of crook or valve seals (poorly mounted or that you cut your lip of the retain. It usually happens but when buying the originals they come as with a condom for valves you must place it if or if at the time of the retaining on the vasto of the valve (the tail) this will prevent the lip of the retain from breaking, if you want it to happen more easy to make a little vaseline or oil (seriously if)

but that there was a bad game, that does not give me a good solution for that we

for customers, they don't look

Good morning, does anyone know where the 2001 Sentra Cigueñal sensor is located? Greetings.....

It would be interesting to know if you have settled your rings, this is already "You loosen the machine"? The Nissan motor shirts are very resistant to wear to the gtado that a Tornero mechanic recommends to use a black tasting ring specifically to make them settle (sealed).

Does anyone know if there is a QG18 Roller Rocker Engine engine, placed for Almera 2005 (Mexico) ????