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HKS 7460R question:

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Old Oct 27, 2015 | 03:20 PM
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HKS 7460R question:

so i purchased one of these turbos from a member here. i was assured the turbo was in perfect condition.
i used the turbo for two autoXes, almost enough to get it tuned. i ran 22psi max out of it.
I believe I have a pic of the turbo at removal, showing no oil on the intake side and no damage to the comp wheel nor housing which would imply excessive shaft play.

Anyway, i ended up pulling the turbo off for a variety or reasons (my tuner doesn't trust the flapper). the person that bought it from me contacted the previous owner, i think. i assume good things were said, as the turbo sold. so, new the new owner gets back to me saying there is too much shaft play and the turbo is dead.

when i received it, i noticed a bit of up and down shaft play. it's my understanding that ball bearing turbos should have no play at all. was i being naive in believing the play was normal for the turbo?

i don't sell junk and will be very upset if i'm on the hook for selling a turbo that ended up being bad.

I have PMs, emails, catalogs, and video of everything. I'm not trying to get over on anyone, just figure out WTF is going on.

Last edited by kaj; Oct 27, 2015 at 11:21 PM.
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Old Oct 27, 2015 | 03:38 PM
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Was the turbo sold as-is or were assurances made (i.e, some kind of warranty express or implied)? I would think used turbos fall into the buyer beware category unless specified otherwise.
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Old Oct 27, 2015 | 03:48 PM
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This is why I always included a video regarding the shaft play with a date/time displayed somewhere in the background each time I've sold a turbo. For all you know the new owner beat the living hell out of it and now is say it's bad.
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Old Oct 27, 2015 | 04:05 PM
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neither my seller nor i mentioned any kind of warranty, return, nor promises. i was told the turbo was perfect. i told the new owner exactly what the old owner said and they spoke. not sure what was said between the two of them. i only said the turbo is being shipped in the same condition i received it (other than i forgot to ship the water lines).

yes, it's buyer beware. my seller isn't going to give me my money back. i know i don't owe my buyer anything, but i have a conscience and don't like the idea of selling something if it's non-functional, especially after having TWO bad turbos dumped on me from members here (i should know the risk of buying a used turbo and know better by now). i bought the HKS used because the person i purchased from is a long-time member.

yeah, i could go the "hey, i don't know what you did with it when you got it" route. i don't think the guy is trying to pull a fast one on me. i don't think he swapped parts, etc. he only says the turbo is ready to fall apart, which seems weird to me as, when i pulled it, there was no damage. none of the blades have touched either housing. it still spun forever when i turned the car off. no smoke. no weird noises.

a video would have been a good idea.. i just didn't use the turbo enough for anything to change and i assumed my seller sold me a good turbo (i'm not trying to imply he didn't).

so, what i have is a seller that swears my turbo is perfect and a buyer that says it's trash. i'm stuck in the middle.

Last edited by kaj; Oct 27, 2015 at 04:12 PM.
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Old Oct 27, 2015 | 04:18 PM
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BB turbo's have shaft play. Spec's vary, but its typically several thousandths radial (left right, or up down), and a few (2-3) thou axial (in and out). I would not be issuing a refund if I were you. It sounds like the turbo is fine if you installed it and ran it at a whole 22psi with no smoke or anything.

My red had play when it was BNIB. The shaft and bearings would melt if there was zero play because that would mean there is no room for oil to fit in between the moving parts..
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Old Oct 27, 2015 | 04:25 PM
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Originally Posted by letsgetthisdone
BB turbo's have shaft play. Spec's vary, but its typically several thousandths radial (left right, or up down), and a few (2-3) thou axial (in and out). I would not be issuing a refund if I were you. It sounds like the turbo is fine if you installed it and ran it at a whole 22psi with no smoke or anything.

My red had play when it was BNIB. The shaft and bearings would melt if there was zero play because that would mean there is no room for oil to fit in between the moving parts..
that's exactly what my seller told me and relayed to the buyer, but it makes me feel better to see someone back it up LOL. my buyer says the Evo 8.5 turbo he sent me (we did a partial trade) had less play. that, i don't know about. i know they have a decent amount of play, though it was pretty much like new.
he says he's going to measure the play and see what it comes out to.
i did autox the car once (at the same 22psi) and have a video of my run that shows no smoke and no funny noises. It was about a week or two before the turbo sold. those are the only miles put on the car that day, as it was trailered to/from the track. i even have in-car footage that should show the boost gauge to prove the 22psi.

Last edited by kaj; Oct 28, 2015 at 12:52 AM.
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Old Oct 27, 2015 | 04:35 PM
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I doubt you hurt the turbo unless you forgot to put the oil feed line on it. I would tell this guy to pound sand.


I wish I could find the thread but I remember FP saying a typical BB turbo has ~.030" of radial play, and ~.002" of axial.
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Old Oct 27, 2015 | 04:44 PM
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Originally Posted by letsgetthisdone
I doubt you hurt the turbo unless you forgot to put the oil feed line on it. I would tell this guy to pound sand.


I wish I could find the thread but I remember FP saying a typical BB turbo has ~.030" of radial play, and ~.002" of axial.
i forget stuff when i'm tired... but i'm not that bad LOL.

in fact when i installed it, i fed oil through the feed line. after that, i cranked the engine over for a bit, then started the engine with the return line disconnected and verified oil was passing through.

i'm very careful when it comes to turbo installs and maintenance.

i googled shaft play allowances and found a whole lot of nothing LOL.
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Old Oct 27, 2015 | 04:53 PM
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Originally Posted by kaj
i forget stuff when i'm tired... but i'm not that bad LOL.

in fact when i installed it, i fed oil through the feed line. after that, i cranked the engine over for a bit, then started the engine with the return line disconnected and verified oil was passing through.

i'm very careful when it comes to turbo installs and maintenance.

i googled shaft play allowances and found a whole lot of nothing LOL.
Yea, they seem to be specs that mfg's don't routinely release. Mostly because mfg's don't consider turbos to be rebuildable by the end user, especially BB stuff...
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Old Oct 27, 2015 | 05:03 PM
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Originally Posted by letsgetthisdone
Yea, they seem to be specs that mfg's don't routinely release. Mostly because mfg's don't consider turbos to be rebuildable by the end user, especially BB stuff...
pretty much. i found a new CHRA seems to be about $1,000. worth it, IMO, for this turbo. i found a place that may sell parts for a rebuild, but i may have misunderstood the listing. it may have also been for a replacement CHRA (there was no price listed).

i hit up Evasive. HKS has them listed as a vendor.
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Old Oct 27, 2015 | 05:21 PM
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I wouldn't worry about it lol
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Old Oct 27, 2015 | 05:27 PM
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yeah, i know. just trying to be as helpful as i can. plus i was curious

Last edited by kaj; Oct 28, 2015 at 12:49 AM.
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Old Oct 28, 2015 | 07:01 AM
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https://www.youtube.com/watch?v=VS1q...ature=youtu.be
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Old Oct 28, 2015 | 07:29 AM
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I had one that had shaft play, and an fp green BB that had shaft play

then again, my 7460r blew its seals...
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Old Oct 28, 2015 | 08:21 AM
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Originally Posted by kyoo
then again, my 7460r blew its seals...
The HKS 7460 is known to be fragile (there are plenty of threads on it on lancer register). Basically, its a great street turbo if you run less than 25lb. boost. If you run more boost than that, or run it hard for long stretches at the track, a 7460 is going to fail, its just a question of when. I really wanted to get a 7460 because the response is amazing, but after researching it, I decided against it.

If you are not legally liable, which it seems like you are not, then it really just comes down to whether you want to be a "nice guy." Only you can make that decision.

Maybe have him send it to Ivey to see what (if anything) is actually wrong with it. I think Ivey probably has the most experience with the 7460. http://www.iveytune.com/

Can the 7460 hotside be modified by FP or Blouch? If so, maybe its not a total loss.

Last edited by nemsin; Oct 28, 2015 at 08:39 AM.
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