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[kcl]

Was replacing a faulty crank sensor to one 2,5 V6 Omega (not mine) and somehow my hand caught on one of the small pipes on the valve on vacuum line coming from brake servo. The two small ones, on the one-way valve, where from all the small ones run to the rear and front of engine, you know what I mean 

So, had to block the broken outlet and make a new connection with a t-piece to the other outlet, car runs ok IMHO. New part has been ordered (the one way valve) but my trouble is how on earth can I disconnect the valve from the thick line coming from brake servo? Is the hose heat shrinked, is it some special hose? I can turn all the connections ok but they are pretty  tight. AM I going to have to replace the hose as well?

[Andy H]

I assume it will need heat to soften the pipe, (maybe boiling water or steam from a wallpaper stripper).

If you were in the UK I would suggest buying a good second hand hose, shifting hard plastic pipes after 10+ years in use is never going to be easy

[Andy B]

.... I can turn all the connections ok but they are pretty  tight. AM I going to have to replace the hose as well?

you'll be in the same position even if you buy a new hose, it's supplied on a roll (or that's what my Vauxhall dealer told me)
I did the same as you, but replaced it on the hose by CAREFULLY heating it with a hot air gun - hair dryer, hot water isn't hot enough. 
I always remove the servo vacuum hose now when ever I do any job around there. 

[kcl]

.... I can turn all the connections ok but they are pretty  tight. AM I going to have to replace the hose as well?

you'll be in the same position even if you buy a new hose, it's supplied on a roll (or that's what my Vauxhall dealer told me)
I did the same as you, but replaced it on the hose by CAREFULLY heating it with a hot air gun - hair dryer, hot water isn't hot enough. 
I always remove the servo vacuum hose now when ever I do any job around there. 

Yes, now I've learned that :-) However, the car I was working is a 2,5 and I've never had this issue with any 2,6 engines which I'm "used to"... From memory it seems there's alot more room in 2,6 engine bay... Well, will have to propose to the owner of that 2,5 to change the engine if not the car to a DBW car 

If no succes with heating will be sourcing a second hand "whole lot". Thanks guys.