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spun bearing.

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Old 03-14-2015, 08:17 AM
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Default spun bearing.

I spun a rod bearing in a stock bottom end ls2. What rod length do I need to replace all my rods? Crank is going to be turned due to scarring. Just not sure what length rods to get. Any help is very appreciated warm weather is coming and I am missing the cruises and shows.
Old 03-14-2015, 09:25 AM
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Depends on the pistons.

Stock pistons will need to be used with stock rods (6.098" length). Aftermarket pistons will vary depending on the compression height and pin diameter.
Old 03-14-2015, 10:22 AM
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Mine was the #6 one....not a good day for me
Old 03-14-2015, 02:21 PM
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How can you tell if a rod bearing Is on its way out or already out?
Old 03-15-2015, 09:00 AM
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Originally Posted by Gotit4cheap16
How can you tell if a rod bearing Is on its way out or already out?
Usually it will make a knocking noise. Sometimes you may even find bearing material in the oil.
Old 03-15-2015, 12:36 PM
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Originally Posted by KCS

Usually it will make a knocking noise. Sometimes you may even find bearing material in the oil.
If it's detected early....how much would a machine shop charge to fix it?
Old 03-15-2015, 12:43 PM
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Originally Posted by Gotit4cheap16
If it's detected early....how much would a machine shop charge to fix it?
That depends how much you need them to do. If you disassemble and reassemble the engine yourself and just need the rods resized, bearings replaced, and crankshaft turned, you're probably only looking at a few hundred dollars.
Old 03-15-2015, 03:05 PM
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Originally Posted by axe murderer
I remember reading that GTO & maybe TBSS pans are pretty bad & 4th gen F body pans weren't that good either.

I bought a used GMPP crate LS2, it has a Corvette pan & was in a F body with a tubular K member, I didn't know it was possible but I'm not sure what options there are for GTOs but maybe Improved Racing has something.

Somewhere on here there are guys saying run extra oil in some cars because in certain conditions the the pan gets nearly sucked dry.
I know it doesn't help now but worth looking into for future reference.
Here's the GTO baffle:

http://www.improvedracing.com/baffle...ffle-p-40.html

We'd recommend you:
  • Add the baffle while you have the pan off (it will be a pain to do later)
  • Monitor oil temps to make sure they are acceptable
  • If you rev above 6,200 or so, consider upgrading to a Melling pump (# 10295 or 10296) to ensure you don't get caviation at high RPMs
  • Consider adding one of our crank scrapers which will help reduce oil starvation while also adding around 2% more horsepower
  • Overfill the sump by 1/2 to 1 quart when racing
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Old 03-15-2015, 06:26 PM
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This is what is left of 6. 5 was also chewed a little and 7 had a good grove.
Attached Thumbnails spun bearing.-img_20150314_180746030_hdr.jpg  



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