38r turbine failure

[Bmcgarvie]

So after my truck started puffing black smoke I decided to tear into it and found my compression to be between 350-380. I also re torqued my injectors which were all a little loose. I then pulled the turbo to take off the .84 housing to reinstall the 1.0 that came on it (38r). I then found the turbine looks to have taken some hits. What could cause this? I have an egt gauge and I've only seen over 1000 degrees a hand ful of times and for very brief timeframe. Also since a t4 kit is still out of budget how many people have experience with the new sxe style kc turbo?

 

[DieselDC]

I have not and I’ve been lucky (400k original turbo) but many of our members have snapped their turbine shaft after a rebuild.

It’s weak by geometry and diameter. There’s a fix: http://alturl.com/maggy

I’ve been checking to see if any are avail. Sadly it’s been out of shock for while now.


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[Magnum PD]

Damage is on the inducer side. Which means it came from the engine side. Who drilled the spot for the EGT probe? It’s possible it came from debris from that or the engine ate something/ came loose inside.

 

[DieselDC]

I highly doubt it’s from the bitties from the drill and tap egt probe installation. Inconel is very hard and I only see that when the shaft has play on the cool side and slowing eroding the hotside and ban bang - it gets chewed up. If something did come from the engine, got more major chit to worry about then.


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[Magnum PD]

Did the shaft have play?

 

[Bmcgarvie]

The turbo has almost zero play. Up and down and none in or out. Definitely not enough to contact the housing.

 

[DieselDC]

Then like magnum mentioned, it must be something from the engine or debris.


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...:uptight people suck:...

 

[79jasper]

Pretty common.
Pull all your glowplugs.....

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[Bmcgarvie]

i just pulled them to do the compression test a couple of days ago. I'm thinking maybe the egt probe? Also the compression wasn't bad either 350-380

 

[79jasper]

They were all the same length?
Could be the probe. Might as well take a look.

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[lincolnlocker]

My question is why the .84 housing?

live life full throttle

 

[Bmcgarvie]

I had put the .84 cause I wanted better low end spool. in all reality I need my tune cleaned up for less smoke. It did spool quite a bit better but wasn't a perfect setup.