Tensioner spring on seat belt

[Grandpappy]

Firstly! is it possible for an ordinary human being to adjust the spring of the family car seatbelt?
I don't want to have to take the car into the local garage and pay an arm & a leg!
When I release my seatbelt , it just hangs limply by the side of the seat and if I don't notice it I get this crunching noise, when I slam the door!!!
BUT, more importantly, HOW DO I DO IT???
Any constructive help , please.
Many thanks.

[NORMANTHEDOG]

you cantfix it ,the spring has gone,go to a breakers yard and get another one and fit it in yourself.

[bazmoore]

garage maybe expensive but if not relaced properly it actually could cost you an arm n a leg and maybe more!
baz.