Generation III Internal Engine 1997-2006 LS1 | LS6
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Just want to verify this:

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Old 05-28-2009, 09:13 AM
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Default Just want to verify this:

Coolant in the oil can only come from 3 places: (assuming you didnt pour it in the oil fill hole)

Cracked block
Cracked head
Blown headgasket

I bet you'll never guess why I'm asking
Old 05-28-2009, 09:24 AM
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You are correct. Sorry you have to ask this question. Also if you have forced induction you can lift the heads with too much boost and get coolant in the oil that way.
Old 05-28-2009, 09:32 AM
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I wish I had a chance to see boost with this motor. Brand new, idle time only, never got to spin the TC78.
Old 05-28-2009, 09:39 AM
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what headgaskets? had same issue with cometics a few years back...never sealed on first try and water ended up in oil just idleing
Old 05-28-2009, 10:12 AM
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Wow that's crazy. Might as well have o-ringed them with spaghetti noodles lol. I'm using 6.0 MLS headgaskets for my 317s.
Old 05-28-2009, 10:55 AM
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Question: This is my first new motor, should the oil be pretty dirty the first time you change it? Like moderately dirty? I'm not sure if I'm seeing milkyness or just new motor break-in stuff.
Old 05-28-2009, 12:23 PM
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Or if you have an integral oil cooler in your radiator. LT1 B-bodies have this problem a lot when the fittings crack in the tank.
Old 05-28-2009, 12:26 PM
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How long have you run the engine since you assembled it? Was the block deck checked by a machine shop. The GM MLS gaskets are a very good gasket, and alot more forgiving then cometic's MLS.




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