S5T2. I can not get the turbine end piston ring to seat. I have searched and this is what I found:

Reinstall turbine shaft:
Replace the piston ring on the end of the turbine shaft, and reinstall. Lube the bearings up with some oil, and press/rotate the shaft back in. Getting the piston ring to compress again is not easy.

But, the piston ring will not go back in place. Should I press/rotate by hand or should I be using mechanical help, I don't want to crack the ring.

thanks
ash

 

I use external snap ring pliers to help it just enough to get in the proper groove.

 

I did use snap ring pliers to get the ring on the shaft but now I can't get the shaft and ring back into the center housing. It seems that the piston ring must be compressed to get it back into the housing.

 

I really hate to say "I told you so"............ but, I did.

 

Lube the piston seal and tap the turbine into the housing with a soft hammer.

 

Thanks, that worked. I had already oiled the ring but I was concerned about tapping it with a hammer, I thought the ring would break off.
Now I need to find a shop to balance it.

 

For reference, all I do is place the the turbine wheel end against a bench (shaft vertical), rotate and press the CHRA down. The ring will pop right into place.

 

Nah, there's a slight taper that compresses the ring, just takes a bit of force to compress the ring so that it can slide into place.

 

Thanks for the info.
I have another one to rebuild so I'll give your method a try. Before I decided to rebuild the turbo on my 7, I purchased a OEM unit on here. I was told it was low mileage with minimal shaft play but it probably wasn't. The o-ring on the CHRA had disintegrated in a couple of places, the journal bearings were worn and the oil return port was mostly gummed over. The guy I bought it from was probably told that it was low mileage also.