Melted exhaust turbine?

[silvreclips]

Just found some damage on the exhaust wheel of my 14b turbo. It looks like the tips of the blades have melted and bent back a little bit. I am going to be replacing in with a 16g in the next few weeks and dont want this to happen to my new one. What does it take for this kind of damage to occur? This past weekend after doing a hard pull to about 6k a flame would come out the exhaust. I just figured it was fuel building up when letting off and didn't worry about it but could that have cause the turbo to melt some? It has only shot the flame maybe 10 times total.

I did have the exhaust manifold welded a few weeks ago where it cracked. Maybe a piece of wire got stuck on the inside and went through the turbo when it broke lose?


http://i189.photobucket.com/albums/z173/SilvrEclipse/BlownTurbo.jpg?t=1221004139

 

[blcknspo0ln]

turbine wheels don't melt. From the picture it looks like a physical object passed through the housing and chewed up the wheel. Whatever the case, be careful to not let foreign objects in your gas stream when you assemble the new turbo.

 

[Turb07]

turbine wheels don't melt. From the picture it looks like a physical object passed through the housing and chewed up the wheel. Whatever the case, be careful to not let foreign objects in your gas stream when you assemble the new turbo.

That is correct Turbine wheels do not melt and from the picture it is a clear cut of forgein debry coming out of the engine or the manifold!
Now if this is your stock turbo and you have had it from new then i would worry but if you bought it used or second hand and your engine is fine then i would say it was done before you recieved it!

just my $.02

Turbo

 

[99gst_racer]

Yup, looks like some type of foreign object passed through there. That's not what heat does to turbine wheels.

What type of gasket do you use between the manifold and turbine housing?

 

[silvreclips]

Turbo has been on there for about 30k. Was not like that a few weeks ago but the manifold has been welded since then so maybe a piece of wire went through it. It was mig welded and I tried to get all the excess wire out but maybe I missed one. I use a metal gasket I got from expremepsi.

 

[silvreclips]

I know this throws the turbo off balance some but will it hurt to run it like this for a few weeks. Should I stay out of boost as much as possible. Turbo seems to have a slower spool but other than that it seems fine.

 

[99gst_racer]

I use a metal gasket I got from expremepsi.

This gasket?
http://www.dsmtuners.com/forums/art...tainless-steel-7cm-turbo-manifold-gasket.html

 

[silvreclips]

Yea that is the one. Damn I have never had any problems with mine. I have used it for over 20k and almost 2 years with no trouble.

 

[banishedmunk]

This gasket?
http://www.dsmtuners.com/forums/art...tainless-steel-7cm-turbo-manifold-gasket.html

i had this problem for a while went through three gaskets and come to find out the flange on my manifold was not completely flat making a week seal in the gasket and it would decentigrate.

 

[fwdmaster]

You got a free clipping

 

[JusMX141]

Clipping a turbine doesn't remove the tips of the inducer.


I've seen a few cases of turbine damage similar to what is shown in the photos...the most common of which was caused by overspinning.

Overspinning occurs when you're running more boost than what the turbo itself is rated efficient, OR if you're running high boost on a hybrid turbo with too large of a compressor wheel mated to too small of a turbine wheel. This is commonly found on TD05H 20G's that are consistently running boost above 25psi.

Turbine housing restriction causes too much back pressure which will also lead to such turbine damage if you're wringing that small turbo out for everything it's worth.


I've seen such damage on TD05H turbines found on TD05H 20G's, and occasionally 16G's that weren't cared for. The only Garrett I've seen with turbine damage was a T31 on a SBR G50. In almost ALL of the cases, the turbos performed fine and their owners were shocked to find out something was wrong. I've yet to see a TD06 or TD06H turbine from a 20G with such damage, so I'm convinced overspinning caused by too small of a turbine wheel is the main cause.

If left unrepaired the turbine will be out of balance and destroy the journal bearings, which will inevitably destroy the turbine wheel, compressor wheel, and possibly the center housing as well.

 

[silvreclips]

Boost was never higher than 18psi. There may be a small boost leak but nothing major that would make the turbo overspool I dont think.

 

[soccerplayaz16]

your not missing part of your egt probe are you?

 

[silvreclips]

your not missing part of your egt probe are you?

No the EGT probe is fine.

 

[soccerplayaz16]

only time ive seen a wheels torn up like that is when a probe melted and got sucked through......good luck