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Generation III Internal Engine
Quick! Head gasket question.

Generation III Internal Engine 1997-2006 LS1 | LS6

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Quick! Head gasket question.

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Aug 22, 2007 | 05:57 PM

#1

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Quick! Head gasket question.

Im ordering a gasket set and I switched from my stock ls1 heads to 5.3L truck heads. The gasket company is saying that the ls1 gaskets may not work and neither will the 5.3. This is starting to scare me! They also informed me that the intake will not bolt up off my ls1 to the 5.3 heads...Is this true? The cast number is 706 and the heads came off a 2005 tahoe with 40k. I was told it was a direct bolt up. Please someone with knowledge help me out.

thanks!
Jeff

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Aug 22, 2007 | 10:43 PM

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can anybody tell me what gasket to use? 5.3L or 5.7 ls1? And will these heads work with my ls1? I was told by several its a direct bolt on and by a gasket company that they are NOT now!

ECKS!

Jeff

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Aug 22, 2007 | 10:46 PM

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I used an ls1 head gasket from cometic with my ls1 block and 5.3L heads and it works fine. And the intake should bolt right up.

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Aug 22, 2007 | 10:52 PM

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Thats a releif! Thanks Brad8266! anybody else want to reassure me?

Jeff

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Aug 22, 2007 | 11:04 PM

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Use 5.7 gaskets , the intake will bolt up no problem!

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Aug 23, 2007 | 03:52 AM

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I'm using Patriot StageII 5.3 heads on my one TA - factory MLS 5.7 gaskets and LS6 intake - no problems with either on install, or 4 years later...

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