volvo s80 loud squiling noise

[avishaym]

hi all

after replacing front shocks,spring seats, and all front control arm bushings, car runs great. BUT a new noise happens only when i turn left and only twice a day in the same spots.
tried to show the mechanic at the shop - nothing. went for a ride together - nothing.
went back home and in the left turn to my parking - boom here it is.
by the way i didn't replace the Upper Strut Mount Bearing as the mechanic said they never fail.
i read that some owners had the same issue solved by relacing them.
any help will be appriciated.
thanks
avishay.