My English is good, but i have a lack of words for car parts (know only basic stuff...some of engine, but tensioner never crossed my mind....
until now.....
I do not have same dictionary to back me up with words, so i searched for some online translations.....they messed me ( and this conversation ) up...
OK now I'm really shame on myself...( after this kind of conversation I'm REALY thinking of buying it

)
I'm really sorry for this.....
To pettaw:
Chain has been cleaned from time to time, but Volvo was in garage for five years ( from 1991-1996-7 ) and after that it had repairs on engine and some other parts.....
After that it had services regularly....i guess chain doesn't need changing.
I'm in two minds of changing tensioner and sprockets, but if there's no time interval for changing those parts, i could change them later...
Do not mention that something will break first.....here is extremely expensive to get original parts not mentioning the used ones...
To Vart:
I'll keep that in mind...Thanks
To A M R:
Ask online translation..... not my fault.
To bogbasic:
Thanks for the data, i'll see what needs changing.
Thanks all for helping me ( and correcting online translation words ).
Cheers