kronus
15+ Year Contributor
- 652
- 27
- Jan 15, 2006
-
Independence,
Missouri
Just finished a rebuild/conversion of a 14b into a s16g using the Turbolab $50 rebuild kit (superback kit.) I noticed that the compressor wheel rubs/binds on the chra/bearing housing. Initially I thought it might have been a difference of dimensions, but I checked the dimensions of the journal bearings, thrust plate and collar, and all of the tolerances seem to be in spec (differences of +/- .00x)
After taking the whole chra apart and putting it back together, I decided to slip the compressor wheel on without first installing the oil shield snap ring, just for kicks. Lo and behold, the compressor/turbine assembly rotates without binding on anything.
So, installation of the oil shield snap ring "pushes" the oil shield far enough into the bearing housing that the compressor can then rub on the bearing housing itself. I tried this with both the new snap ring provided in the rebuild kit and the old snap ring, and both exhibit the same behavior.
Has anyone experienced this before? Am I missing something in the rebuild?
After taking the whole chra apart and putting it back together, I decided to slip the compressor wheel on without first installing the oil shield snap ring, just for kicks. Lo and behold, the compressor/turbine assembly rotates without binding on anything.
So, installation of the oil shield snap ring "pushes" the oil shield far enough into the bearing housing that the compressor can then rub on the bearing housing itself. I tried this with both the new snap ring provided in the rebuild kit and the old snap ring, and both exhibit the same behavior.
Has anyone experienced this before? Am I missing something in the rebuild?