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Old 06-19-2009, 02:10 AM   #1
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Default damaged bearings

hi guys,
i recently bought a new OSspeed 21 vzb spec2 for my 1/8 buggy. did the normal break-in process. after break-in run a few tanks ther was unexpected noise coming from the crankshaft. i open the engine n found out the rear bearings has no freeplay as i turn it wit my fingers. i assume that the bearings was damaged.
this engine is using ceramic bearings for the rear. somebody told me i shld not use after-run oil for ceramic bearings, some say that is not true.

change the rear bearings to a new one but is steel bearings cause the ceramic was out of stock. everything is running fine now,no funny noises from crank.
somebody told me i wil loose 10% power cause of the steel instead of ceramic bearings. but wen running it wit the steel bearings i did not feel any difference, mayb cause im stil new at this hobby.
my questions:-

1. did the after-run oil damage the ceramic bearings?
if not wat was the cause of the damage?

2. wil i loose power cause of the steel instead of ceramic bearings?
if loose power by how much?
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Last edited by dirtyboo; 06-19-2009 at 02:28 AM.
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Old 06-19-2009, 06:40 AM   #2
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you won't notice a power difference but when its time to change it again I would go back to ceramic. I dont think you messed up anything with aro.
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Old 06-19-2009, 09:16 AM   #3
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You cannot damage a ceramic bearing with any oil. It always makes me laugh at how many "Bearing Engineers" are out there. The real difference is not power but spool up and no dips in RPM because the ceramics do not cause a frequency that can drop RPM. Also they run cooler and last longer.

If you need any bearings let me know.

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Old 06-19-2009, 09:56 AM   #4
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Quote:
Originally Posted by Peter Martin View Post
You cannot damage a ceramic bearing with any oil. It always makes me laugh at how many "Bearing Engineers" are out there. The real difference is not power but spool up and no dips in RPM because the ceramics do not cause a frequency that can drop RPM. Also they run cooler and last longer.

If you need any bearings let me know.

www.tkocompetitiondev.com

Peter
909-256-4064
^^^^^BEST BEARINGS MADE.
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Old 06-20-2009, 01:10 AM   #5
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u guys r right, the aro is not the issue. how can lubricants damage some bearing. some people wil say things that they r not 100% sure bout, those bearing engineers...
stil wondering why it was damage. can this happen to new engines?
anyway, i wil b using the steel bearing untill it wears off then will change back to ceramic. thx for the info guys!
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Old 06-20-2009, 07:59 AM   #6
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Bearings just wear out and sometimes sooner than others.
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Old 06-20-2009, 01:56 PM   #7
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Quote:
Originally Posted by Peter Martin View Post

If you need any bearings let me know.

www.tkocompetitiondev.com

Peter
909-256-4064
Peter, can you post up the engine bearings for a OS V-Spec in ceramic for me?
I went to your site and can't find them!!
Thanks Joe
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Old 06-20-2009, 01:59 PM   #8
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Found them at A-Main, but out of stock on the rears
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Old 06-20-2009, 09:16 PM   #9
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We have them in stock Joe. Just sent a bunch to A Main.

Front CB-607C2RS

Rear CB-MR25414
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Old 06-21-2009, 04:22 AM   #10
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Thanks Peter !!
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