In a nutshell, I started hearing some strange, faint "chirping" occasionally a few days ago. My car is straight piped at the moment so it's hard to hear if it's going on all the time, but I can hear it when just coming from a stop, and decelerating.
I got the car up on a lift today and was checking everything over and the chirping was coming from the exhaust. I pulled the intake off the turbo and was able to move the shaft quite a bit more than when I put the turbo in originally (used, back in December), and I also have some oil residue on the inlet of the compressor as well (valve cover breather NOT connected preturbo). I could also see some very fine metallic "dust" in the inlet as well, and VERY light abrasion/scratching where the compressor wheel meets the inlet. It still makes boost fine and doesn't seem to have any other symptoms at this time.
My question's are:
Is the entire turbo junk?
Has anyone used Garrett's exchange program? Maybe I can still use my compressor and turbine housing? BBService | Turbobygarrett
The good news is, if can do the exchange program, a friend of mine has 2 brand new, never ran potato's hanging off his built 300zx motor he hasn't touched in a few years. He said he'd give me one of his CHRA's and I can give the new one back to him when I get the exchange one from Garrett.
If exchange is not an option, just buy a new CHRA? https://conceptzperformance.com/Cart...on.php?II=2884
Or try rebuilding it myself or getting it rebuilt by a shop? (I see mixed opinions on rebuilding a BB turbo...)
Try and get lucky by finding a replacement turbo off one of you guys?
As always, I appreciate any input you guys have...