Anyone used these ? Or have thoughts on how good their application would be. http://cgi.ebay.com.au/Turbo-Rebuil...ZAU_Car_Parts_Accessories?hash=item1c0d9d570e
http://www.aus300zx.com/forum/showthread.php?t=295154&highlight=ebay+rebuild i wouldnt touch it... grab some new chra cores from coz.. much cheaper and no balancing needed
OK So ive gone ahead and bought 2 of these kits. The seller has pointed me to a thread on another forum for installation. We should have this dumped in the tech section for sure. http://www.sr20-forum.com/forced-induction-turbo/21597-how-rebuild-t25-t28-turbo-pic-heavy.html
I'd be interested to see the response to this. I saw these kits ages ago, but dismissed it as I read at the time that there was far more to rebuilding turbos than just applying a kit.
That is right chad, building turbo's is relatively simple, but it takes alot of time to clean and reassemble correctly.
It seems like the fiddly sort of repairs I like the best. Sometimes its nice to be sitting at a desk assembling some nice clean parts, rather then wrenching under a Z on your back getting PS fluid and caked on grease in your eyes :zlove: Guilty pleasures, I know...
I Love your timing on this one bud. I pressure cleaned my engine (its out) and had a look at the turbos only yesterday. Found some play in the drivers side turbo. Was considering my options - but this tech artical looks all too easy peasey japanesey to me
Good luck, you're going to need it. It is quite easy to do, when you know how and have actually been taught how, but is very easy to get it all wrong. Not to mention the special tools, blasting/dipping, balancing, measuring, clearances, radial play, axial play, torque specs etc that this write up seems to jump over. And its not like it only takes 20 mins to get them back off to fix them.
Eric thats all good, but "you never know unless you try". One of my many mottos for this year (ive got plenty let me know if you want to hear the rest ) The worst you can do is FSCK up your turbos, on the flipside you gain intimate knowledge on how these things function and do some highly needed maintenance. This is the sort of nay saying that came up in my spraypainting course thread. Rather than shiting on people for trying how bout filling in the gaps if you have determined the tech article is lacking in areas.
The worst you can do is fcck up your engine. I'm not shitting on anyone for trying. The article is a very half arsed attempt at turbo rebuilding and covers nothing other than basic disassemble and reassemble. It isn't even rebalanced, changing the thrust collar requires rebalance. If you need to send it in to be balanced, you may aswell get them to assemble the chra. The parts need to be spotlessly clean, otherwise the balancing will be wrong and the seals may not do their job. Now unless you have someway of cleaning the parts, either by bead blasting or acid dipping, the place who does the balancing will need to do this aswell. This is how it goes Mark housings Disassemble Clean all parts thoroughly Measure and crack test parts Pre-assemble chra Measure axial/radial movement Disassemble chra Reassemble compressor wheel and thrust collar to shaft Send out for balancing Reassemble complete turbo Carry out final measurements. There are quite a few steps there that most here haven't got the tools/knowledge to do. I only charge $400 per turbo using genuine garret kits. More than half that price is the kit and balancing, so really it isn't too much more expensive when you consider what it may cost you in the long run.
Eric, Many thanks for this useful info. As you know I do most things to my cars including mechanical, bodywork, spraying and upholstery. But there are some things that require expertise and tools that I havent got, turbos come into this category. If you dont get it right the least it can mean is engine removal and new turbos. For $400 each, I will trust the experts. PM sent Martin
Update. I got my rebuild kits after a fairly long wait, seller thought it was ok to advertise parts on ebay without actually having stock. :bash::bash: He was pretty good with communication though so I wont hold it against him. One of my turbos is binding a bit when you turn the shaft. So after dismantling I find the exhaust side seal is all coked up. It was hard as hell but after leaving it soak all night in fuel and then giving it a run on my home made lathe, ie drill and jewellers screwdriver its clean as a whistle. Insertion back into the bearing housing and no binding at all. I will be sending the CHRA off for balancing just to be sure after its all assembled
You cant assemble the CHRA and then have it balanced. Pre-assemble the CHRA without fitting the seals. Check clearances and end float. Disassemble the CHRA, fit the thrust collar and impellor, send these out to be balanced.
Update.. I sent my shafts (all rotating components) out to be balanced. All up it has cost me $165 per turbo which included the price of the kit and balancing. Need to fit them all back together when I get some free time, Ill take some photos.
