Shownomercy

iTrader: (1)

Preface, sorry about quality, pic taken with a potato.



Journal bearing, older 76gts

Thoughts on that? It will catch a finger nail but the wheel looks to be free from damage so IDK what to think. I can move the shaft slightly up and down but IDK how much play is allowed.

oscs

iTrader: (19)

Pull it now. Any contact on the cover is a no no

Shownomercy

iTrader: (1)

Worth the gamble?

oscs

iTrader: (19)

If you can get it back in tolerance than yes. Problem is you should get it balanced.

Shownomercy

iTrader: (1)

Which is the only reason rebuild shops can justify the ~300-400 to rebuild it.

Stuck on what I wanna do with it.

oscs

iTrader: (19)

Yup. A few places around here charge around $100

stevieturbo

I've seen plenty of turbos where contact has been visible last 100k, so that alone isnt necessarily a problem.

And if you DIY rebuild, as long as the turbine and impeller are bolted back in the same position, balancing is not a concern.

Really though, some new turbos are so cheap, I'd just run it until it does **** itself, then upgrade.

Shownomercy

iTrader: (1)

The main reason I am thinking of rebuilding is that perhaps this scuffing is the noise I am chasing

I will link that thread later when I get on a laptop

stevieturbo

An out of balance shaft can make a whistling noise, the actual contact probably wont make noise. Or some problems with the impeller also make a whistle, ofton more noticeable during spool up.

I know the thread you're referring to, although i simply couldnt hear anyhthing in the video.

That contact does look very very light though.

69-chvl

iTrader: (11)

I think the impeller on my turbo NEW would hit the housing if you put pressure on it. But once the oil wedge gets around the shaft it should center itself.

I'd run it.

oscs

iTrader: (19)

OP this is one of the times when you shouldn't listen to everything you read on there Internet. Think about it for a second.. That turbo needs a rebuild. It's really that simple. You are risking a lot letting it slide. Just my .02

Shownomercy

iTrader: (1)

I know, and to be honest, it will get sent out for peace of mind. But, forced inductions said they won't touch it and I reeeeally don't want give it back to pte. Work turbos said he could rebuild and I have been talking to a place in Detroit that will do it.

What concerns me is either a) pte holds it hostage and says it's required to have $800 of repair b) shop other than pte cobbles together the rebuild cause pte doesn't sell rebuild kits

Should have stayed stock.

stevieturbo

Well certainly the first part of that statement is true.

I've seen turbos with markings worse than that run well beyond 200k. Many things can cause shaft movement during operation that may see some contact with the volute...it's no big deal.

Hell even my YSi did it, and it runs on a fixed bearing system so there should be...and was no play. But air moving back/fro etc can cause the blades to move. It's a simple reality and can have nothing to do with the condition of the bearings used.
And given JB turbos are already fairly loose to start with....really it is no big deal.

But by all means if it is a concern have it looked at...but as you say if they do come back with say $800 or so....how much is a brand new BW that will offer better performance ?

But I'd have no concerns running it and even if it fails it's no big deal unless it leaves you without transport.

Shownomercy

iTrader: (1)

I do not think I could fit a BW unit, even if there was a smaller T4 frame one.

stevieturbo

True...they're usually pretty big.

Shownomercy

iTrader: (1)

Sucks cause for the rebuild price I am prob halfway to a base model BW S400 lol

Or be brave and grab a PT88

oscs

iTrader: (19)

[QUOTE=stevieturbo;19209138]Well certainly the first part of that statement is true.

I've seen turbos with markings worse than that run well beyond 200k.

Great advice! last post was 100k

Many things can cause shaft movement during operation that may see some contact with the volute...it's no big deal.

Hell even my YSi did it, and it runs on a fixed bearing system so there should be...and was no play. But air moving back/fro etc can cause the blades to move. It's a simple reality and can have nothing to do with the condition of the bearings used.
And given JB turbos are already fairly loose to start with....really it is no big deal.

That's because they are riding a a cushion of oil! of course they are going to be "loose" when they are stagnate.. I mean come on man..

But by all means if it is a concern have it looked at...but as you say if they do come back with say $800 or so....how much is a brand new BW that will offer better performance ?

But I'd have no concerns running it and even if it fails it's no big deal unless it leaves you without transport.

You cant possibly be serious? No concerns running a compressor at 100k RPM that is making significant contact with the housing? You clearly have never seen what happens when a turbine blade makes contact and snaps off.

OP there is one thing that is clear as day. Its a hell of a lot cheaper to rebuild the turbo than it is to rebuild your motor. Risk vs. Reward

stevieturbo

Clearly you've never worked on too many turbos if you think that's going to cause his impeller to fall off.

And by your reckoning the turbo is fucked anyway, so makes no odds anyway.

oscs

iTrader: (19)

Wrong. I've seen it happen more than a few times that's why I'm amazed you would suggest it. It's not worth the risk and shitty advice advice at best.

Shownomercy

iTrader: (1)

Looks like I am gonna send it to Reed and go from them. At the very least I get an unbiased opinion on what may have gone wrong and evaluate.