I my my oil pan replaced on my 2001 s80 and the frame had some work and after that every time I accelerate from about 0 to 30ish it makes a hissing noise, it's weather depending I would say. I'm not sure what it is but any suggestion would help

 

What year/Model is this? and what kind of frame work?

 

2001 s80 and just a dint straightened out