LoneStarS30Z Posted August 22, 2010 Share Posted August 22, 2010 (edited) Been reading ton's of different turbo rebuild FAQ's and figured I'd see what your opinions are since most of us are very DIY intensive. I feel secure enough that I can dissemble and reassemble the turbo with the multiple write ups online, however I'm a bit iffy about balancing. The majority of people say that as long as you scribe a line across the compressor wheel, nut, and the end of the shaft that the balance SHOULD be good. My car is white smoking and I have oil deposits in the hot side of my intercooler piping right after the turbo. So I'm assuming the seals are bad and I'm wondering if I would even need to touch the bearings etc? If my seals are crapped out, but I have little to no shaftplay, should I just not even bother replacing the bearings? But if I do replace the bearings and the other hardware too, for those who have rebuilt their turbos, did the whole scribing work for you long term? Or should I just have a shop take care of the balancing? If it helps any, my turbo its a (Innovative Turbo Systems aka Turbonetics) ITS SH 60-1, 60ar compressor housing, 63ar exhaust housing. Edited August 22, 2010 by LoneStarS30Z Quote Link to comment Share on other sites More sharing options...
letitsnow Posted August 22, 2010 Share Posted August 22, 2010 What has always confused me is that the compressor wheel is not mechanically indexed on the shaft, it's only held lined up by friction(admittedly, a lot of friction). Meaning that rotation of the compressor wheel relative to the shaft is possible. It seems to me that unless the compressor wheel and turbine/shaft are balanced independently(each is neutral), that this is a major design flaw, and I don't think the engineers at turbonetics/borg warner/garrett/honeywell/etc would miss something like that. Not really helpful to your specific situation, but related to the topic and I thought I'd share. I've got one that I'm going to rebuild and hybridize myself, I've only got ~$75 in it so if it dies a quick death I won't be too pissed at myself for being cheap. Quote Link to comment Share on other sites More sharing options...
LoneStarS30Z Posted August 22, 2010 Author Share Posted August 22, 2010 I was under the impression that the nut holds down the wheel's center section on the bottom with the fins raised slightly against this end cap/compressor seal: Quote Link to comment Share on other sites More sharing options...
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