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RB25 turbo all ball bearing???????

RBMAD

By RBMAD,
in Engines & Forced Induction

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RBMAD Rookie

RBMAD

Posted
Posted

Hi guy's I feel abit of a dic#k, I just bought a RB25 turbo and the shaft has alot of play in it. I e-mailed the guy I bought it from and he said that RB25 turbo's are bush bearing not ball bearing. I would have bet my left ball that RB25 turbo's were all ball bearing. What's the go????? Hope I didn't get ripped off.

Thanks for any info!

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R31 POWER Mentor

R31 POWER

Posted
Posted

Yes they are BB and will have a bit of shaft play.I don't have specs on how much play is acceptable thou.Once the core has got oil thru it some play goes away.

If it is a RB25 turbs the guy knows nothing about them.

tridentt150v Grand Master

tridentt150v

Posted
Posted

BB=bush bearing, not ball............I think R34's are ball.

Also early r33's were ceramic vanes, later ones were steel, R34 are plastic [or so i've read].

Steel is best, plastic next, they say ceramic tend to break after a while.

You can send the turbo to GCG in Condell Park Sydney and they will convert it to ball bearing and hiflow it for $1200 to $1900.

siksII Grand Master

siksII

Posted
Posted

series1 r33 came with metal compressor wheel

series 2 came with nylon compressor wheel (so did r34gtt)

both came with ceramic exhaust wheel.

I cant say for sure whether they are ball bearing but i always thought they were. the one on my old car had a bit of play i had it for 20,000kms no problems. they are cheap anyway just use it and dont worry about it.

MrMayhem Mentor

MrMayhem

Posted
Posted

trident i think your confusing the inducer wheel with the turbine wheel

the s1 has a alloy inducer, ceramic turbine and the s2/34 are polymar inducer with ceramic turbine

they are ball bearing not plain bearing, even if it were a plain bearing still doesnt justify play in it as ballys have more play from factory...... is it thrust play (in out)?

tridentt150v Grand Master

tridentt150v

Posted
Posted
Think again , ALL R33/34 RB25DET's came from Nissan with a Ceramic turbined Hitachi Ball Bearing turbo .

Late model S2 came with steel front and back std, I know, I just had mine out. I have pics.

As for ball vs bush, I was only repeating what I was told, I could have been wrongly informed.

tridentt150v Grand Master

tridentt150v

Posted
Posted
your's must have been rebuilt then!!

OOOOHHHHH NNNOOO,,,,,,,,,,,,,that's not right, my car only had 40,000km on it................................lol

It could have been, or maybe they changed specs. I've got a '98 R33 40th, the last of them, they were virtually making the R34 next to them [figure of speech].

I really don't know, I only know what I have seen on mine, and assumed other late model R33's had the same.

race_snooze Grand Master

race_snooze

Posted
Posted

stock 95 model. ceramic exaust wheel, 64,000 no play in the bearings in mine. Had it off recently. So dont know whats wrong with the one you bought, go take it to pro and have them look/test it for tolerances

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