Turbo seals on the way out?

[Stixbnr32]

I thought I had a boost leak with the sound I could hear for along time but couldn't find it.  Lately I have noticed my - 5s have had some smoke when coming to a stop.  I don't think it's my valve stem seals as this was all done in my built motor. 

Turbos have done about 40,000kms at 500hp and now pushing 600 since tune 2 months ago. 

Do you think I'm on the right track? 

[GTSBoy]

Well, if they're noisy, it will be more than just the seals. The thrusts have probably taken a lot of wear.

[MoMnDadGTR]

my stock turbos would smoke after a good pull and I came to a stop, smoke would go away soon. I took the turbos off and could not find anything wrong. replaced with -7's smoke has never returned. I think my seals and bearings were on way out. hope this helps.

[Stixbnr32]

Yeah my -5's have done a good 40,000km.

Think I will have to take them off in winter get them rebuilt.