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Old Mar 12, 2006 | 06:46 PM
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Default Spun bearing....

I guess I really did it this time. What em I looking at money wise?!
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Old Mar 12, 2006 | 08:06 PM
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A rebuild or a used short block basically.
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Old Mar 12, 2006 | 08:11 PM
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Yep the crank and at least one rod will have to come out. What was the oil level like when this occurred? also how high do you spin the motor?
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Old Mar 12, 2006 | 08:13 PM
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Stupid question, but what are the effects (engine behavior) of a spun bearing and what usually causes it?
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Old Mar 12, 2006 | 08:21 PM
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Originally Posted by shortdog
Stupid question, but what are the effects (engine behavior) of a spun bearing and what usually causes it?
High RPMs causing rod bolt stretch especially on the pre-01 Ls1. Another possible cause: an ls1 run about 1 to 2 quarts low on oil will also loose oil pressure sometimes at high rpms.
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Old Mar 12, 2006 | 08:37 PM
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Think of it as an excuse for a 383.
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Old Mar 12, 2006 | 09:34 PM
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Originally Posted by cantdrv65
Yep the crank and at least one rod will have to come out. What was the oil level like when this occurred? also how high do you spin the motor?
The level was normal. Nothing out of the ordinary. 80+ psi?





Originally Posted by Lithium
Think of it as an excuse for a 383.
dont have the money for that just yet
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Old Mar 12, 2006 | 09:37 PM
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Originally Posted by shortdog
Stupid question, but what are the effects (engine behavior) of a spun bearing and what usually causes it?
A lot of kncking
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Old Mar 12, 2006 | 09:41 PM
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Originally Posted by 6spdpewterZ
The level was normal. Nothing out of the ordinary. 80+ psi?
So the engine was full of oil, I mean via the dipstick? Also how high do you rev the motor? 6800? 7k?

If full of oil you probably streched a rod bolt at high rpm.
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Old Mar 12, 2006 | 09:43 PM
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Originally Posted by cantdrv65
So the engine was full of oil, I mean via the dipstick? Also how high do you rev the motor? 6800? 7k?

If full of oil you probably streched a rod bolt at high rpm.
I messed up there.....67..
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Old Mar 13, 2006 | 07:56 AM
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6700 dosnt seem all that far a stretch even for an 00 with the weaker rod bolts. Did you beat the car like a rented mule every time you took it out?
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Old Mar 13, 2006 | 09:27 AM
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Originally Posted by GuitsBoy
6700 dosnt seem all that far a stretch even for an 00 with the weaker rod bolts. Did you beat the car like a rented mule every time you took it out?
that is funny. No I just never took it at high speeds ever 130+. I only ran it at the track a couple of times but I guess I over did it this time.
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Old Mar 13, 2006 | 09:57 AM
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Are you positive you spun a bearing. What's your symptoms?
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Old Mar 13, 2006 | 10:04 AM
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I've seen strong detonation do it too
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Old Mar 13, 2006 | 11:30 AM
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Originally Posted by 777
Are you positive you spun a bearing. What's your symptoms?
Loud knocking and extremely low pressure. I am guessing I spun a bearing since I am a newbie to this. What else could it be 777?
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Old Mar 13, 2006 | 11:38 AM
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Sorry man it sounds to me like your diagnosis is correct. I agree that 6700 is not too high, I spun my 99 that high and got 114,000 miles out of the thing. Detonation as Fireball mentioned may have caused it, or maybe the engine was slightly loose from the general.
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Old Mar 13, 2006 | 12:37 PM
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Thanks for your input guys. The LS1 will be coming out this weekend. I will post pics as we dig into the ls1.
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