Meriva noise (gas pump)

Hello everyone, I have a Meriva 1.8, 2008, which has 111,599 kms traveled, since I bought it I have services to the agency until I finished warranty, I am fulfilled in its services, in fact I do them at my home, change of oil, spark plugs, air and oil filter according to manual, and I take it to the mechanic for change of the belt, however for 2-3 months under the rear seat, I listen to a buzz Gradually, it is at fuel tank level, in fact it vibrates if you touch it, I imagine that it is the pump, this car does not carry gas filter, in short they believe that the pump is thundering, it can be cleaned or someone has had similar problems and what solutions have made, I shed their help

Hello Luis. As the mechanic tells you, the bomb is about to die ... or not! I saw them making noise that was heard perfectly from the outside of the car ... and there are!, Giving cane. Change it when I leave you lying.
The noise is of the slack that takes the axis. It has no cleaning, unless it is due to accidental atnque.
That is little ...