Spun Bearings

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Spun Bearings

Post  bbcoupe on June 30th 2016, 4:01 am

Racing a few weeks ago and noticed oil pressure gauge fluctuating after run so packed it up for the trip home.

On tear down found oil pump pick up sitting on bottom of pan.

Spun 2 rod bearings.

Scat 9000 series 4.500 crank

Machine shop says there's a 7thou bend in the crank which they say can be ground out by going .020 on the journals.

Machine the crank or replace?









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Re: Spun Bearings

Post  Scott Foxwell on June 30th 2016, 8:45 am

Any decent machine shop should be able to straighten the crank before they grind it.

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Re: Spun Bearings

Post  Scott Foxwell on June 30th 2016, 8:47 am

...

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Re: Spun Bearings

Post  dfree383 on June 30th 2016, 8:52 am

I'd just fix it, didn't get too hot.
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Re: Spun Bearings

Post  gt350hr on July 1st 2016, 2:01 pm

+1 I have a FMS 514 (Scat 9000) crank that looked like that. Cleaned at .010 under and the mains stayed std. No problem.

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Re: Spun Bearings

Post  bbcoupe on July 1st 2016, 9:14 pm

Is already at .010 that's where the .020 grind recommendation come from, and more than another .010 and bearing choice becomes a challenge.

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