Quote:
Originally Posted by OM617YOTA
Diesel911, do you have any input on turbo balancing? The shop I took mine to for bearing bore hone + oversized bearings says that balancing each piece independently won't work, they'll be off when assembled, and balancing as an assembly is the only way to get it right.
Right now I'm inclined to have them balance my rotating assembly, even though the parts are new.
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On Turbos like the T-3 if they were not already marked you marked the compressor wheel and the shaft end so they could be lined up on assembly. Then when the Turbo was apart you inspected to see if there was any metal missing from the Compressor or turbine wheel.
If there was metal missing you had a decision to make about the balancing.
They can be balanced as an assembly or as individual units.
If they are balanced individually you don't need to worry about how they are located. If they are balanced as an assembly. (turbine wheel, Compressor wheel and the nut then the Compressor which is removed during assembly has to be lined up to the match marks during assembly.)
My guess is that now a days when the turbo was assembled the turbine and the Compressor wheel were balanced separately. If you don't see any match marks on it from the factory then then they were likely balanced separately.