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About twenty years ago I bought a new Air Research T04 turbo in a generic kit for a project that never went anywhere. It's been sitting in a box in a garage during that time, and now I want to sell it. The turbo has never been installed, but the shaft is surprisingly hard to turn (It's hard to guess, but I'd say something like 1 inch-lb is required). It's not impossible by any means, but it's significantly harder than the good condition td04 I have laying around. In addition, there's 5-10 degrees of free play before the shaft becomes hard to turn. If I had to guess, it feels like the bearing is loose in the housing just a little, then it grabs and whatever assembly lube is now acting like a mild glue. Does this seem reasonable? Is this normal?
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Dec 30, 2016 05:29
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| # ? May 5, 2024 22:49 |
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james posted:About twenty years ago I bought a new Air Research T04 turbo in a generic kit for a project that never went anywhere. It's been sitting in a box in a garage during that time, and now I want to sell it. The turbo has never been installed, but the shaft is surprisingly hard to turn (It's hard to guess, but I'd say something like 1 inch-lb is required). It's not impossible by any means, but it's significantly harder than the good condition td04 I have laying around. In addition, there's 5-10 degrees of free play before the shaft becomes hard to turn. I'd try putting some oil in the center section and see how it feels. I don't think that's typical. The free play and then "hard to turn" doesn't sound good for the bearing, either.
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Jan 10, 2017 17:36
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Agreed- plug one side and put some good oil in the center section. Let it soak, spin it over, and drain it out. Repeat if necessary with something stronger like ATF.
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Jan 10, 2017 19:38
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An engine oil bath overnight did not loosen anything up. I think I'll try to remove the compressor wheel and pull the shaft out, see if there's any scoring/damage. Does the compressor wheel need to remain indexed to the turbine to maintain balance? The turbine nut is damaged/ground but the compressor end is not, which used to indicate that the compressor wheel was balanced separately from the shaft+turbine. Is this generically true, or just a thing from my unique turbo experience?
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Jan 12, 2017 01:22
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