Bad turbo??

[AbsoluteSpeed]

I was all excited to come home with my new winter tires that i finally got, but on the way i started to notice a finny noise. It only starts when im pushing it at about 4000rpm just as im hitting any kind of boost. It sounds like some one is taking a pice of metal to a grinder or something.
Any ideas?

Oh and i was looking things over and i was low on oil dont know if that would have anything to do with it.

[Supra_Soul]

First of all, how low on oil? If it was on the dipstick, you are probably ok.

I would start with the heat shields. they can make some pretty nasty sounds if they come loose or are cracked.

On my sunbird, before I rebuilt the turbo, there was so much shaft play that occasionally the turbine would actually rattle around making a horrid noise. Hopefully it's the heat shields. :)

[Supra_devil]

4000rpm...just as your hitting any kind of boost?

a ct26 should be at FULL boost around 3000rpm. if its not doing that, then i would take the intake off and look at the impeller fins to see if they are fuct and check the shaft play

[AbsoluteSpeed]

4000rpm...just as your hitting any kind of boost?

a ct26 should be at FULL boost around 3000rpm. if its not doing that, then i would take the intake off and look at the impeller fins to see if they are fuct and check the shaft play

Yea i always thought it took a long time to kick in and it only goes up to 3x100mmhm (or what ever the boost is measured in) but i think it was only going as high as 2 today. And i just had the intake off a week ago i had to replace one of the elbows.

And the oil was just showing up on the dip stick i put half a quart in.

[annoyingrob]

300mmhg is only about 5psi, which is semi-normal. 200mm is way too low though. If you're having boost issues, with metal grinding noises, It's a good bet that your turbo is pooched. Like was said, remove the intake pipe from your turbo, and check the compressor wheel. If it has excessive movement from side to side, or any movement in and out, it's bad. If you notice any scrapes along the edges, or any chips, it's done.

Alamo will rebuild and upgrade the turbo to a 57 trim for like $650, or you can find used ones online.

[AbsoluteSpeed]

ill have the car in the garage tomorrow, doing the breaks, so ill check then.
But it is only going up to 2 on the gauge i checked today

[AbsoluteSpeed]

...If it has excessive movement from side to side, or any movement in and out, it's bad. If you notice any scrapes along the edges, or any chips, it's done...

Is there anything else im looking for? Sorry to second guess ya just want to know everything before i bother doing anything.

[Supra_devil]

check the condition of the actual impeller wheel itself, any broken, bent, or otherwise damaged fins are bad as well.

[AbsoluteSpeed]

So there was little to no movement in the turbo and the fins look to be all right i have a picture ill post later. I was also told to check the waste gate to see if it has come loose and that could have been causing it but it was tight so i dont know what to do now.

Also the exhaust is blue (oil) it used to be that it would give a puff of blue when i started it but now its every time i touch the gas.

[AbsoluteSpeed]

I dont think it looks that bad, do you?
http://i243.photobucket.com/albums/ff14/f-runco/In-Turbo.jpg

[annoyingrob]

That compressor side looks pretty good actually. If you say you're blowing a lot of oil, it's very possible that the oil seal has gone in the back of the turbo. You can take off the downpipe to see if there's oil in the exhaust side.

If you did blow an oil seal, CT26 rebuild kits are $140.

[AbsoluteSpeed]

That is a lot more reasonable but i would need help getting it out and fixing it.

[AbsoluteSpeed]

And blowing an oil seal would also mean i would lose pressure? Because it still only goes up to 2 x100mmHm

[Dan_Gyoba]

Learn to rebuild a turbo? I am so THERE. Just do yourself a favor, and look for the stainless steel oil lines as well. The stockers are a serious pain to install. It was hard enough with the engine on a stand, I can't imagine trying that with the block in the car... Not and retaining what sanity I have left.

The oil seal shouldn't lose pressure, but poor lubricaton of the turbo center section could do it. The most likely causes for low boost pressure are either a boost leak, or a wastegate problem.

Ir occurs to me that I've seen a crack in the turbo housing next around the wastegate listed as a relatively common problem. This would also reduce the amount of boost pressure available. Let's hope that's not it.

Oh, and valve stem seals will puff blue on startup, and after any time that the engine is under a lot of vaccuum, like decelleration in gear (engine braking,) even shifting will do it. That's the condition of the valve stem seals in my 7M-GE.

[AbsoluteSpeed]

Next time i open it up i will be taking it out and you can take a look at it (especially if you help ;)). If i had every thing before hand how long do you think it would take to remove rebuild and re-install it?

Oh and Dan you will get a kick outa this you know that steering wheel you gave me for 20 bucks? Well apparently its worth $2500 (Yes two thousand five hundred!) brand new. No horn no cruse nada. I was thinking of getting yours recovered but thought it might be cheaper to get one new.
I was wrong.

[Dan_Gyoba]

LOL! Yeah, that's one of the things that's ridiculously overpriced new.

I'd suggest that you use the one I sold you, and maybe look at getting yorus recovered. I'm sure that there's a leather shop that can recover yours, good as new.

[GOT_BOOST]

Blown oil seals in the turbo will also cause blue smoke upon start up and also deceleration. I have been there....twice! :D

Your intake side on the turbo looks fine.

Check for boost leaks and run a different boost gauge. I do not trust the stock Toyota one.

If your turbo spins fine, but does not make a metal on metal or a whirring noise then your turbo is not pooched.

Are you crop dusting while you are driving. Ie) Blue smoke pouring out the exhaust ALL the time?

I have killed 2 CT26's in my time. Both by exceeding the maximum efficiency of the Turbo. :D

Mike

[AbsoluteSpeed]

It was blowin blue smoke under normal driving but has eased up a bit but im not about to leave it that way i gota do some thing.
Where would the best place be to get the parts?
What exactly do i need?

[AbsoluteSpeed]

Still need to know what i need? i want to try and fix it next weekend, so i need to order them soon.

[GOT_BOOST]

It was blowin blue smoke under normal driving but has eased up a bit but im not about to leave it that way i gota do some thing.
Where would the best place be to get the parts?
What exactly do i need?

I do not rebuild them, I just purchase pre owned ones. :D It is cheaper in the long run. :D

The blowing blue under normal driving is a good sign of turbo failure. Either that or your valve seals are worn out. More than likely the turbo.

Mike

[AbsoluteSpeed]

Check the turbo for shaft play there was almost none also looked for chips and any sign of grinding there was also none. so i figure it would cost less to try and swap gasktes unless someone has a really cheap turbo.