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Generation III Internal Engine
Any difference in stock valves through the years?

Generation III Internal Engine 1997-2006 LS1 | LS6

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Any difference in stock valves through the years?

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Jun 20, 2004 | 08:34 AM

#1

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From: Pace, FL

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Any difference in stock valves through the years?

I have a stock intake valve that has a rough spot on it that is think is causing the valve seal to fail on that cyclinder. I noticed it when I changed the seals and it is the only one that has a little oil on the plug. I'm putting on a set of AS heads soon and want to stick a new valve in my stockers before I put some stock springs and all back on it. Car is an 02' and I have access to lots of 99' valves, but didn't know it GM made any changes. Thanks in advance.

John

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Jun 20, 2004 | 09:26 PM

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Anybody?

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Jun 20, 2004 | 11:11 PM

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From: Warr Acres, OK

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here's what the parts cd shows:
98 in - 12550457
98 ex - 12550458
99-02 in - 12563063
99-02 ex - 12555907

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Jun 20, 2004 | 11:19 PM

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Thanks very much buddy! I'll pull a 99' valve and slap in my head before I put it back together. Have a good night.

John

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12555907, gm, valve

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