I think that the problem is in the hydraulic followers, because they are noisy all the way. The first days after fitting them I thought that the noise were normal, but now after nine months using it the sound hasn`t disappeared. It`s a sound like a mechanic follower, and when I rev up the sound increases a lot.

Some days the noise is louder and the engine seem to rev up worse than the days when the lifters are making less noise.

I have revised all things and I suppose that the problem is in the lifters. Also I have removed the rocker cover and in the inspection found that the lifters that are in opening valve position have the tip that push on the rocker appears to a bit sunken.

This is one foto of the head work. It `s only a slight work, I only removed the imperfections and improved a bit the shape. I think for my specification is ok.