Hi FastThunder. I'm having a problem with the same metal pipe you are... but by problem is just the opposite... I cant get it back in all of the way!! I'm getting a small leak there also.
I did not have to disconnect the hose to get the pipe off though, but if it'll give you more leverage, go for it.
You may want to consider new o-rings for that pipe- it needs two (if it's the same setup as mine). One in the middle of the pipe, and another at the very top.
Let me know how you make out getting the pipe back in. I worked on it half the day on Saturday and I still cant get the darn thing back in all of the way.
I take full responsibility for this post. Anything I've written here is an opinion.
1994 Cougar XR7 V6 - Black. New Paint, Alpine HU, Infinity Perfects, Phoenix Gold Amps, Audiobahan Sub, PG 232 EQ