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-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   gt2554r rebuild (https://www.miataturbo.net/diy-turbo-discussion-14/gt2554r-rebuild-66185/)

zoom zoom 05-29-2012 04:27 AM

gt2554r rebuild
 
I bought a used gt2554r from here awhile back, and it has quite a bit more shaft play than advertised, so I want to rebuild it before I put it on my car. The compressor wheel moves up and down/side to side/in and out, and about any way imaginable, not a lot, but it does move in directions I dont think its supposed to.

Where do I get a rebuild kit, I've been looking but I don't understand what I need. I've heard they can't be rebuilt and need a whole chra, which I understand is everything but the housing as a unit? Are there any upgrades I could do with the compressor?

I would rather not get/use eBay parts.

blaen99 05-29-2012 04:31 AM

If it's a GT255R, you are done. You have to get a replacement CHRA, there is no way to rebuild it.

A replacement CHRA + an upgraded compressor is, in all likelihood, as much or more than the cost of just upgrading to the relevant turbo.

duffbuster243 05-29-2012 09:10 AM

Just run it, It's going to last a lot longer than you think. Its normal for ball beraing turbos to devop play, as long as it spins smoothly and is not touching the housing you will be fine. I have a gt2554 in my mazdaspeed protege that has had excessive play for 30,000+ miles and still works perfectly.

zoom zoom 06-01-2012 01:14 AM

I don't want to chip the compressor wheel and ruin a 1400$ motor over a busted turbo. Do the chips get into the motor or would they get cought up in the intercooler?

thirdgen 06-01-2012 01:25 AM

I'm wondering if it's possible to swap out the ball bearing chra with a journal one from a sr20 unit. I have a spare journal bearing chra that would cost $80 to rebuild. If you can remove the turbine wheel / shaft from the chra...measure it...length and diameter. I'll tell you if it's the same, and I'll sell you my chra cheap.
I have the wheel and shaft, but it's like .8mm different from sr20 to 2554. Something like that.

zoom zoom 06-01-2012 04:14 AM

I'm not opposed to tearing into it, but I don't know the difference between journal bearing and a chra's ball bearing. If this doesn't pan out ill have to wait until next year to get a new turbo, no chance I'm gonna be able to come up with 7-900$ for a scavenge pump wheel...supposed to get married this year.

duffbuster243 06-01-2012 11:33 AM

The turbine housing on a ball bearing turbo has 6 bolts where the chra bolts onto it, on a journal bearing it only has 4. You would need the turbine housing, compressor housings are the same as long as it has the same size wheel.

elanman 06-01-2012 05:34 PM

Please let me know if you are interested in selling it. I might be interested because I hear it's a perfect turbo for a 1.6 litre. Cheers.


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