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Old 06-30-2019, 05:26 PM   #1
that11guy
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Default Bad Turbo

I am trying to figure out what happen to a turbo I have and whether or not it is still usable in its current form. I purchased this turbo well knowing it may have its issues, so I took it apart and did some inspecting. The lateral shaft play doesnt seem too bad and there is no in and out shaft play. There is a mark on the compressor housing where it touched but I cannot make the fins touch the housing by moving the wheel. My guess is the car lost oil pressure and this was the result.

Shaftplay:
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Old 06-30-2019, 05:28 PM   #2
Acaicia
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My guess is a ball bearing went bad
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Old 06-30-2019, 07:27 PM   #3
that11guy
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Quote:
Originally Posted by Acaicia View Post
My guess is a ball bearing went bad
This particular turbo is journal bearing.
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Old 07-02-2019, 11:38 AM   #4
that11guy
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YouTube video above is of shaftplay. May need to click it, doesnt embed well apparently.
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Old 07-02-2019, 12:03 PM   #5
subaru_gc8
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if it touched it will probably mean the bearings are not good any more, or its out of balance
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Old 07-03-2019, 12:55 PM   #6
that11guy
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I took the compressor wheel off and inspected the play. It appears that it is coming from the center section to bearing clearance, *not shaft to bearing*. Does anyone know how much clearance should be here? Is that normal that there should be any there at all?
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Old 07-05-2019, 05:37 PM   #7
theotherguy
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It looks like a kinugawa turbo. Buy their rebuild kit and maybe a wheel, have a local shop balance and mark it for you, then assemble. Maybe upgrade to a billet wheel while you're at it. It's pretty easy, I've done several.
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Old 07-10-2019, 01:01 PM   #8
that11guy
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Quote:
Originally Posted by theotherguy View Post
It looks like a kinugawa turbo. Buy their rebuild kit and maybe a wheel, have a local shop balance and mark it for you, then assemble. Maybe upgrade to a billet wheel while you're at it. It's pretty easy, I've done several.
Nice Name! LOL I went full send and installed the turbo. I took it pretty far apart and inspected all of the pieces and I wasnt able see any wear. So either kinugawa assembled it wrong with incorrect bearings, its out of balance from the factory, or the previous owner ran out of oil pressure and it tapped the housing briefly.
I have been periodically checking it and so far so good.
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Old 07-17-2019, 08:51 AM   #9
Kyrocon
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Yeah I would look into a new turbo you don't want to risk the turbo blowing and getting shrapnel into the engine. Almost happened in my 04 wrx but I caught it just in time. Threw a red flag when the turbo stopped spooling. But I recommend you get a new turbo just based off personal experience.
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Old 07-17-2019, 01:03 PM   #10
that11guy
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Quote:
Originally Posted by Kyrocon View Post
Yeah I would look into a new turbo you don't want to risk the turbo blowing and getting shrapnel into the engine. Almost happened in my 04 wrx but I caught it just in time. Threw a red flag when the turbo stopped spooling. But I recommend you get a new turbo just based off personal experience.
LOL the turbo not spinning sounds frightening! The turbo is on the car now actually. It has the same amount of shaftplay compared to my known good turbo after I took it out and inspected it.
I have inspected the kinugawa a few time through the past 300 miles or so and nothing alarming so far.
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