Bad Garrett out of the box??? with pics
09-11-2010, 11:04 PM
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Bad Garrett out of the box??? with pics
And the adventure continues...
Turns out the original turbo my turn key ebay miata came with was blowing so much oil my mid pipe was leaking it under the car! Rather then rebuilbing it we decided to invest in the lastest and greatest from garrett. I ordered a brand new GT2554 for the '93.
Got it, clocked it and torqued it exactly to Garrett spec. Installed, oil primed.
First run, just a heat cycle for 30 mins then off.
Next day, check the mount bolts and fluids and took it for it's first street ride with the link set to prevent boost. About 30 minutes into low zone tuning the turbo started to scream. Back to the garage. Pulled it and found the turbine had hit the housing and done MAJOR damage!!! Check out the pics.
***!!! no shaft play, all torqued, maybe an hour total run time and never at boost and this crap happens!
Anyone had anything like this before? I guess I have to wait till monday to contact Garrett, Anyone know how their customer service is?
Turns out the original turbo my turn key ebay miata came with was blowing so much oil my mid pipe was leaking it under the car! Rather then rebuilbing it we decided to invest in the lastest and greatest from garrett. I ordered a brand new GT2554 for the '93.
Got it, clocked it and torqued it exactly to Garrett spec. Installed, oil primed.
First run, just a heat cycle for 30 mins then off.
Next day, check the mount bolts and fluids and took it for it's first street ride with the link set to prevent boost. About 30 minutes into low zone tuning the turbo started to scream. Back to the garage. Pulled it and found the turbine had hit the housing and done MAJOR damage!!! Check out the pics.
***!!! no shaft play, all torqued, maybe an hour total run time and never at boost and this crap happens!
Anyone had anything like this before? I guess I have to wait till monday to contact Garrett, Anyone know how their customer service is?
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09-11-2010, 11:20 PM
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No axial shaft play maybe, but there has to be radial shaft play for it to grind out on the housing.
Few questions:
1) were you using an oil feed restrictor?
2) How did you "prime" the turbo with oil?
3) Where is your wastegate signal source?
Few questions:
1) were you using an oil feed restrictor?
2) How did you "prime" the turbo with oil?
3) Where is your wastegate signal source?
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09-11-2010, 11:24 PM
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Google searched bad Garrett, found this:
http://forums.evolutionm.net/engine-...-gtr-site.html
Hope it's B.S.
http://forums.evolutionm.net/engine-...-gtr-site.html
Hope it's B.S.
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09-11-2010, 11:28 PM
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No axial shaft play maybe, but there has to be radial shaft play for it to grind out on the housing.
Few questions:
1) were you using an oil feed restrictor?
Yes, ordered it with the turbo.
2) How did you "prime" the turbo with oil?
Left the coils/fuel unplugged, cranked the motor over for about 10 seconds, 3 times after I had pressure on the gauge.
3) Where is your wastegate signal source?
The bolt on compressor adapter has a fitting.
Few questions:
1) were you using an oil feed restrictor?
Yes, ordered it with the turbo.
2) How did you "prime" the turbo with oil?
Left the coils/fuel unplugged, cranked the motor over for about 10 seconds, 3 times after I had pressure on the gauge.
3) Where is your wastegate signal source?
The bolt on compressor adapter has a fitting.
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09-11-2010, 11:32 PM
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The shaft doesn't bind, I can just hear the turbine sing as the blades hit.
I'll work on some pics.
Last edited by Underway; 09-11-2010 at 11:44 PM.
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09-11-2010, 11:32 PM
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Google searched bad Garrett, found this:
http://forums.evolutionm.net/engine-...-gtr-site.html
Hope it's B.S.
http://forums.evolutionm.net/engine-...-gtr-site.html
Hope it's B.S.
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09-11-2010, 11:34 PM
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There is just enough play to barely allow the blade to touch and none in and out. It actually looks like the blades are deposited on the housing rather then digging out the housing. I have no way of messuring but the turbine doesn't look centered in the housing outlet. 2 playing cards distance on the side that didn't hit.
I'll work on some pics.
I'll work on some pics.
CHRA exchange is $450 from ATP.
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09-11-2010, 11:41 PM
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More pictures.
The Garrett site says to contact the distributor.
More info: Believe it or not the distributor here in Florida actually emailed me back at 230 on a sunday morning. That's awesome!
He gave me a heads up about how strict Garrett is and the warranty inspection process. Basically I send it to them, they decide what happened and we go from there.
I'll post the results.
The Garrett site says to contact the distributor.
More info: Believe it or not the distributor here in Florida actually emailed me back at 230 on a sunday morning. That's awesome!
He gave me a heads up about how strict Garrett is and the warranty inspection process. Basically I send it to them, they decide what happened and we go from there.
I'll post the results.
Last edited by Underway; 09-12-2010 at 04:35 AM.
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09-11-2010, 11:50 PM
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Sounds like you primed it good, and I know you could have overspun it with your signal source on the compressor
BUT
GT series turbos have a built in oil feed restrictor, meaning you dont need one built into the fitting, you just use a normal AN fitting.
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
Even with Garretts quality coming into question recently, you never really see these kind of quick failures even with the no-name ebay turbos unless something was done incorrectly.
Its still possible Garret just fucked up, but unless some of our members with engineering degrees chime in and say that a second restrictor wouldnt cause oil starvation, then I would think that it was likely the cause.
Either way, though break, It sucks to see a brand new expensive part bite the dust.
BUT
GT series turbos have a built in oil feed restrictor, meaning you dont need one built into the fitting, you just use a normal AN fitting.
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
Even with Garretts quality coming into question recently, you never really see these kind of quick failures even with the no-name ebay turbos unless something was done incorrectly.
Its still possible Garret just fucked up, but unless some of our members with engineering degrees chime in and say that a second restrictor wouldnt cause oil starvation, then I would think that it was likely the cause.
Either way, though break, It sucks to see a brand new expensive part bite the dust.
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09-11-2010, 11:53 PM
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Are you certain the turbine housing and CHRA are seated properly?
https://www.miataturbo.net/showpost....33&postcount=5
https://www.miataturbo.net/showpost....&postcount=113
I run a .032" restrictor and there is no smoke and its been raced. I've also considered one of those fancy turbo oil feed filters too just in case something floats down the hose.
GT series turbos have a built in oil feed restrictor, meaning you dont need one built into the fitting, you just use a normal AN fitting.
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
That doohickey is actually the locating pin for the bb cartridge, and the Garrett bb turbos have had those since forever. So you basically don't even have to think about it.
As such, the advice to add a restrictor so that you get ~35 psi (or whatever it is, I forget) at the turbo always has been and will be valid.
As such, the advice to add a restrictor so that you get ~35 psi (or whatever it is, I forget) at the turbo always has been and will be valid.
I run a .032" restrictor and there is no smoke and its been raced. I've also considered one of those fancy turbo oil feed filters too just in case something floats down the hose.
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09-11-2010, 11:56 PM
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Sounds like you primed it good, and I know you could have overspun it with your signal source on the compressor
BUT
GT series turbos have a built in oil feed restrictor, meaning you dont need one built into the fitting, you just use a normal AN fitting.
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
Even with Garretts quality coming into question recently, you never really see these kind of quick failures even with the no-name ebay turbos unless something was done incorrectly.
Its still possible Garret just fucked up, but unless some of our members with engineering degrees chime in and say that a second restrictor wouldnt cause oil starvation, then I would think that it was likely the cause.
Either way, though break, It sucks to see a brand new expensive part bite the dust.
BUT
GT series turbos have a built in oil feed restrictor, meaning you dont need one built into the fitting, you just use a normal AN fitting.
Im no expert on fluid dynamics but maybe having 2 restrictors could have caused oil starvation. (This is why I immediately asked if you were using a restrictor)
Even with Garretts quality coming into question recently, you never really see these kind of quick failures even with the no-name ebay turbos unless something was done incorrectly.
Its still possible Garret just fucked up, but unless some of our members with engineering degrees chime in and say that a second restrictor wouldnt cause oil starvation, then I would think that it was likely the cause.
Either way, though break, It sucks to see a brand new expensive part bite the dust.
Never thought about the over spun issue. Where else would you run your signal from? Also, the car was never over 3500 rpm, the link ecu limits it to prevent boost. If I never saw anything above 0 on the boost gauge then how could the turbo be overspeed?
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09-11-2010, 11:58 PM
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Are you certain the turbine housing and CHRA are seated properly?
https://www.miataturbo.net/showpost....33&postcount=5
https://www.miataturbo.net/showpost....33&postcount=5
I always thought that was a restrictor in there
Well anyway, Im full of fail like always.
Looks like Garrett fucked up, start giving them **** until they fix it.
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09-12-2010, 12:02 AM
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Why would the install kit have a restrictor in it then? Recommended from the distibutor for gt25-28's?
Never thought about the over spun issue. Where else would you run your signal from? Also, the car was never over 3500 rpm, the link ecu limits it to prevent boost. If I never saw anything above 0 on the boost gauge then how could the turbo be overspeed?
Never thought about the over spun issue. Where else would you run your signal from? Also, the car was never over 3500 rpm, the link ecu limits it to prevent boost. If I never saw anything above 0 on the boost gauge then how could the turbo be overspeed?
But if its on the compressor housing it couldnt have overspun.
But yah, I was wrong about the restrictor. Most of my experience is with journal bearing turbos, so I always thought that the little aperture inside the feed of GT turbos was an restricor.
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