dying turbo signs ?

[Classique71]

having not had this happen , whats the telltale signs of a turbo on the way out ?

i have a feeling seals might be out on the ct20b i have - at idle smoke , smoke after drivng distance in traffic .

I dont feel it was rings , as the engine in question did not smoke before , with another turbo on it

[Andrew162]

check for lateral play in the shaft, and also leaking oil out the compressor wheel. when you boost it, how much smoke does it put out?

[YelloRolla]

Oil smoke at boost huffing out the tail pipe - kinda like the Chattanooga. Inconsistent boost ramping - ie doesn't boost progressively, and may even go backwards (10 psi at 5000 and 5psi at 5500 rpm), turbo whines like a tom cat.

[Classique71]

ticks for all of the above - the mechanic confirmed last night that its rooted ..

rebuild time for me ( to keep insurance company happy and to maintain stock look )