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Generation III Internal Engine 1997-2006 LS1 | LS6
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have you experienced this?

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Old Jan 31, 2004 | 07:11 PM
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franny40
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From: Imperial, CA
Default have you experienced this?
I took off my oil cap and noticed a yellowich type foamy substance and what looks like water inside of the oil filler neck.I called the dealer and they said to keep an eye on it. I cleaned up the area and about 2 weeks later the stuff showed up again. I have a 2002 Tahoe 5.3 and I have not encountered this with it. Has anyone else ever experince this and what do you think this is?Thanks
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Old Jan 31, 2004 | 07:22 PM
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Seems to be pretty normal condensation. Most of us experience it in the winter..I wouldnt worry about it, but do keep your eye on the coolant level.
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Old Jan 31, 2004 | 07:28 PM
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I agree if you have a 160 stat and take short trips in the cooler winter weather you might see this.
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Old Jan 31, 2004 | 07:29 PM
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Default foamy oil
i had a similar situation with a pontiac montana and i discovered the yellowy foam when the valves start clacking. it was in fact coolant leaking into the enigine oil.
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Old Jan 31, 2004 | 10:17 PM
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sounds like the intake manifold gasket is leaking. I had the something on my wife’s grand AM. see if the coolant is a little greasy felling.
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Old Feb 1, 2004 | 12:06 AM
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There is no water path to the intake manifold on LS engines.
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Old Feb 1, 2004 | 02:06 AM
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i agree with CrazyBosnian sounds like condensation. an aluminum block produces more condenstion than the iron block that bein the reason your tahoe does not have the same problem.
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