i have a so called "t28BB" here, but want to confirm

went to nissan silvia website but every next post contradicts the last

anyone have an easy way to check, the ID tag is missing unfortunately

there is shaft play in that the wheels can move laterally in the housing, but no movement longitudinally (aong the common shaft)...should i be worried about the condition of it or is some lateral movement accepted as normal?

Bring it over and check it out with my t28bb

pretty sure bb have 6 bolt turbine housing

Nope the rear housing size is different but still 5 bolt

are you talking about where the dump pipe bolts to supa?

im talking about where the turbine housing bolts to the chra, should be 4 or 6 bolts

Yep I was talking rear housing but I've also had a s14 t28 6bolt front housing, and s15 t28bb and is 6 bolt as well

T28 brush bearing





T28 ball bearing

easiest way to tell if its ball bearing is where you bolt the chra to the turbine housing, 360 degree thrust bearing will have 4 bolts and ball bearing 6 bolts like in the picture. i circled the ones im talking about

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sweet, mine is 6 bolt, any comments on the shaft play?

well usually as long as it spins freely and there's minimal movement it should be fine, its hard to say without out seeing it. what the compressor wheel look like? not discoloured or anything? are the edges smooth?