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Author Topic:   Spun Bearing
Scoot
Member
posted August 27, 2004 01:27 PM
What can cause a spun bearing? Scat 9000 crank. At the time it happened I had just changed from conventional oil to synthetic oil.

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Scoot
Smith Racing Team
870-365-5989


dirtbuster
Member
posted August 27, 2004 01:44 PM
If you are thinking its the oil I would give you a 99% certainty its not. Id start looking at other things first.


rico 08
Member
posted August 27, 2004 03:31 PM
Man scoot did another motor let go?Was that the crank from the other motor that went south,maybe there lies your problem..heck in a 350 i would not be scared to run an old stock type cast crank up to 7000 rpm.I've been running my claimer style motor for half the season with no lower end problems,it's for sale,a guy already has dibs on it tho(hopefully it'll last this weekend!)


racer17j
Member
posted August 27, 2004 07:42 PM
improper clearences,out of ballance,bad oil filter. bad line bore on the block. i've even had a tranny lock up on me and then the next week motor had no power and bad oil pressure turned out to be spun bearings. not sure if that why it did it or not but it only had about 30 laps on it when it did it and alli did was change cranks and it lasted the rest of the season no problem


Scoot
Member
posted August 27, 2004 10:55 PM
No rico I still havent got another motor together. This was the first one that blew. The short block was professionally put together, it was balanced and the block was line bored and I had just put Castrol Syntec with a new Wix filter in it. It only had 9 races on it. It was bad fast too. I was just wanting to know so it hopefully doesnt happen again. I wish I had never took my other motor out. After I stuck it back in and put the heads and intake on it, it blew a head gasket and trashed the block and heads. I just havent had the extra cash to get another one going.

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Scoot
Smith Racing Team
870-365-5989


iowatoolman
Member
posted August 28, 2004 03:27 AM
don't feel bad last year i was using a professional shop to build my motors and i went thru 5 before changing now i have a good friend that use to work in a machine shop assemble my motors i haven't blown 1 up yet knock on wood ( KNOCK KNOCK )
sometimes professional shops get worried about the almighty dollar and get sloppy or in a hurry

hope that made you feel better it made me remember how much money i spent last year
:-(
drive hard or drive home

anybody else know where the right turn is???
(it is a figure 8 thing)


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