My van hotter engine

Radiator hose broke and the engine wakened. The mechanical indicated that he had to change the packing of the butt and sanding the stock, which with the warming valves (12 valve) was deregulated but would skyrocket auto regulating again.

I like the vehicle it turned on, there is no compression and the mechanic indicates that I believe that we should change rings, I do not know what to do please to his diagnosis because the mechanic is not quite sure what it does.

Do not speak English - speaking Spanish - this send them my consultation with translation of the internet.

I will be attentive to its recommendations.