So I'm in the process of replacing hoses, and some of the hose is 3.5 mm on one end, and something like 6-8 mm on the other end. Is there some prefered technique to get the hose to stretch? I was thinking of using a hair dryer or some other heat source and a large phillips tip screwdriver to stretch the ends.

Thanks!

 

Add a tiny amount of oil to the nipple and force it on. Just enough to lube it and not greatly affect the rubber in a bad way. I've also used a screwdriver to sort of hone out a hose before too. It worked. Good luck.

 

Should have seen me shoving that 3" onto my IC in/outs, that was a massive apin in the ***!! My wrist hurt for a week after that.

 

Try fitting a pair of needle nose pliers in the end of the hose then opening the pliers to stretch the hose around the nipple.