I'm getting ready to replace the fuel line on my 93 525iT. I have a couple of questions for those who've done this before.

1) What is the size of the line...10mm?

2) To do the whole engine bay I'm estimating 2 meters of line. Is that a good guess.

3) As the fuel line goes into the rail, there is some type of fitting that is circular and has a band/strap type clamp. The area seems just a little wet occasionally. I've tried to tigthen the strap (philips screw adjuster) but I think something else in that fitting miht be failing. What does this part do, and does anyone know that part numbers I need to replace/fix this?

4) The vent line coming out of the front of the valve cover really needs replacement...it is very brittle. Is there a specification/diameter on this line? It certainly does not need to be FI line, just some type of fuel/vent line.

Thanks for any advice.

-Phil