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Generation III Internal Engine
Bearing clearances

Generation III Internal Engine 1997-2006 LS1 | LS6

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Bearing clearances

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Old

Jul 15, 2014 | 10:54 AM

#1

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From: Hurley, VA

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Bearing clearances

I'm putting a 408 together. Mainly track car but will see some street use. I plan on staying N/A if not it won't be a big shot. Went with 0.020 and 0.022 ring gap but I'm curious what the mains and rods should be. Rods and crank are new and I'll be running ARP studs and Clevite H bearings.

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Jul 15, 2014 | 11:20 AM

#2

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From: Brazoria TX

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I believe they can be found on LS1howto.com If I remember correctly, mine were set at .0015. Pretty damn tight.

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Jul 15, 2014 | 02:04 PM

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A.R. Shale Targa

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From: Fredonia,WI

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Assuming you're running an iron block try shooting for .0023 to .0028 mains and .0018 to .0023 on the rods.

Old

Jul 15, 2014 | 06:35 PM

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From: Katy, TX

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I'm running up to 0.0031" on the mains, 0.0030" on the rods, and 0.0067" on the cams on my iron block. Have over 50psi hot idle with 5-30 oil.

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Jul 15, 2014 | 07:08 PM

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Iron block .0029" mains and .0028" rods here. On the iron 370 I have in the works I'm shooting for .0025" main, .0023" rods.

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Jul 16, 2014 | 07:37 PM

#6

On The Tree

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Iron 408 here, .3 on mains and .2 on rods, ls6 oil pump ported. Running 10w-30 and getting 60 at cold and 45 at hot on idle.

Old

Jul 16, 2014 | 10:26 PM

#7

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From: Baxter,KY.

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Did you have the block line bored with the main studs ?

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Old

Jul 17, 2014 | 09:05 AM

#8

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From: Hurley, VA

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I haven't yet. Thats what I'm waiting on is to get the main studs in so I can check everything to see what needs to be done.

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