ACCORD 2001 : Engine volve adjustment

I went to a Honda dealer for my SRS/airbag light on problem, it is caused by the safety belt/buckle and it is under Honda warranty, so it is free.
They recommend to do an engine volve adjustment for $250, since it is a little noise according to the service people. But for such an old car, who cares, I do not even care about the body. I just use it as a truck for my rental business, since I have a rack on the top which I can carry big boards from HomeDepot..
It has 140 miles on it. Does any body know whether it is necessary to do this Engine volve adjustment?