dcg9381

I bought this as a reman'd Garrett - .60/.63. I drove it between 100-200 miles on 10w-30 dino. If it doesn't look Garrett to you, let me know..
<10 psi, wastegate set at 7psi.
I suspected an oil problem, but I measured the idle oil pressure at the turbo at 20psi (idle) to 65psi (at RPM).

I believe the turbo was starting to get out of spec, so I wanted to tear it down before it did any expensive damage. I measured the lateral play in the compressor turbine (up / down) at .030 total, top to bottom, which is beyond Garrett's recommended spec of .022.

I expected to see oiling issues. To my eyes the bearings look good, I've got more wear on the hot side journal bearing than the compressor side, but neither one looks particularly out of spec. Both bearings appear to be standard size. There is a little more wear one the hot side of the turbine shaft than the compressor side, I dont know if this is normal. It's nothing I can feel with my fingers, but I can see it as bring spots on the shaft.

Thrust bearing looks fine.

The only thing that looks odd to me is a "bushing" that sits in the back plate of the compressor. It sits loose in the back plate. Back plate doesn't show any signs of wear...

I'm kinda lost here as to why this guy was starting to fail.. Any ideas? Good news is there doesn't appear to be any housing/turbine contact, so this should be an inexpensive rebuild in terms of parts.

Full pictures at:

http://lakebox.dnsalias.com/ph...urbo3/