Renault Express Diesel problem

Hello, I have a problem with an Express, I take the Board Culate a week ago and now I return and make a very strong noise and smoke by the admission, the butt is rectified and proven, the distribution is aim, the water and the oil is at the level, the noise seems to come from the closer cylinder to the distribution, could someone give me an idea, to see what can be ??

Hello friend, did you control the thickness of the Board of Board? Bring notches on the edge that indicate their thickness and you have to respect them, luck and tell us to discover.

Check the taquets or may be an injector that has been open