Turbo Chewing

[sassriverrat]

Good Evening,

M923A2 concerted to an M925A2. 8.3 unmodified. Fuel turned up 3/4 turn (so not much). Almost no smoke whatsoever.

Anyway- pulling stuff apart to clean and paint (and rebuild alternator), I found that the compressor side of the turbo has some pretty chewy looking blades- all looked like the were put on a grinding wheel because the metal is scrapped off to one side and ROUGH. Nothing apparent to cause this. Shaft has maybe MAYBE a few thousandths of play in it- just enough that I can see a wiggle.

Any ideas on this? Cost of upgrading vs rebuilding vs swapping out?

Has ever so slight blue smoke at idle and underway so I perceive maybe some oil blowing by?

Thanks,
Austen

 

[Elijah95]

Pictures would be a bonus

 

[simp5782]

Hx50 upgrade and an intercooler is under $600 for everything

Good Evening,

M923A2 concerted to an M925A2. 8.3 unmodified. Fuel turned up 3/4 turn (so not much). Almost no smoke whatsoever.

Anyway- pulling stuff apart to clean and paint (and rebuild alternator), I found that the compressor side of the turbo has some pretty chewy looking blades- all looked like the were put on a grinding wheel because the metal is scrapped off to one side and ROUGH. Nothing apparent to cause this. Shaft has maybe MAYBE a few thousandths of play in it- just enough that I can see a wiggle.

Any ideas on this? Cost of upgrading vs rebuilding vs swapping out?

Has ever so slight blue smoke at idle and underway so I perceive maybe some oil blowing by?

Thanks,
Austen

Sent from my SM-G965U using Tapatalk

 

[sassriverrat]

Perks of the upgrade?

 

[Elijah95]

That’s not healthy at all

 

[simp5782]

More power. Better throttle response. Intercooler allows you to get rid of the aftercooler and itll keep your EGTs under 1100 even at high fuel rate and to the floor.

I have a large intercooler for sale. Another member here is doing the HX50 swap right now

Sent from my SM-G965U using Tapatalk

 

[sassriverrat]

What would you like for it?

 

[WillWagner]

Change out the air filter, all those pieces parts went right back into it.

 

[jasonjc]

Your may be need more than just a turbo. I'll bet the engine is "dusted". We have had to do an inframe on one and the turbo looked way better than that.

 

[sassriverrat]

anyone know the numbers for an HX50 turbo- a lot for sale on Amazon and CHEAP.

Thanks

 

[simp5782]

anyone know the numbers for an HX50 turbo- a lot for sale on Amazon and CHEAP.

Thanks

https://www.steelsoldiers.com/showthread.php?158656-8-3-turbo-discussion/page2&highlight=hx50

 

[Elijah95]

anyone know the numbers for an HX50 turbo- a lot for sale on Amazon and CHEAP.

Thanks

Stay far away from cheap turbos on amazon and other related auction sites, they are cheap china knock offs that risk blowing apart and totaling an engine

 

[74M35A2]

Your turbo experienced FOD, Foreign Object Damage. The amount of play you specify is normal for a hydro-dynamic bearing and was not the cause. Oil takes up that space once running. It is required to have clearance to lubricate and float the carrier bushing which spins at half of shaft speed. The few hundred dollar turbos are Chinese, most seem OK, but... You could get a used genuine Holset for the same $.

Slight smoke can be from a weak or leaking OFV, Overflow Valve, the spring loaded one way check valve on the injection pump outlet, common wear item. Can also be from air leaking through old fuel suction hose, dribbling fuel injector, etc...

HX-50 alone will delay throttle response, as it is a larger turbo than the HX-40, but it will blow more air on the top end.