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How to identify LS3 valves?

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Old Mar 18, 2010 | 08:24 AM
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Default How to identify LS3 valves?
How do I visually identify LS3 valves as opposed to L92 valves? It's getting close to swap-meet season and I want to be prepared.
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Old Mar 18, 2010 | 11:48 AM
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I' m thinking that they have some pink paint dots on them. I had some and sold them awhile back. The best way to tell is buy the weight if they are used. The exhausts are the same.
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Old Mar 18, 2010 | 12:16 PM
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The weight isn't really going to help me if I'm looking at fully assembled heads... and of course, if the heads are used, there probably won't be a pink dot.

There's really no way to identify them visually?
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Old Mar 18, 2010 | 12:30 PM
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I would just bring a spring compressor with you when shopping and pull one valve to look at so you can be sure you are getting a head with hollow valves.
The LS3 valve is a three piece design, and you can easily see the line where the hollow tube is welded in between the valve head and the tip.

Jim
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Old Mar 18, 2010 | 12:33 PM
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The LS3 valves are shinier than the L92 valves...Check out the pics in my profile...
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Old Mar 18, 2010 | 12:44 PM
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Originally Posted by Petraszewsky
The LS3 valves are shinier than the L92 valves...Check out the pics in my profile...
what pics would you be referring to? I don't see any pics of valves in your LS2 album?
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Old Mar 18, 2010 | 12:49 PM
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The pic with the grizzly can next to it...I've also got a link explaining it let me find it real quick..
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Old Mar 18, 2010 | 12:50 PM
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https://ls1tech.com/forums/generatio...omparison.html
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Old Mar 18, 2010 | 12:55 PM
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Beat me to it...that's exactly what I was going to link too...hahaha
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Old Mar 18, 2010 | 12:58 PM
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Perfect. Thanks!
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Old Mar 18, 2010 | 06:49 PM
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No problem....
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Old Mar 19, 2010 | 09:49 PM
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Another thing to look for when the LS3's are installed is the stem height. The intakes will be .020 higher than the exhaust. So if you look at the valves in a row fashion it'll be up,down,up,down,etc.
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Old Mar 20, 2010 | 04:17 AM
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^^^^Mine weren't like that...I have read about some ported ( WCCH , and others ) heads being that way though...
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Old Mar 20, 2010 | 06:49 AM
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I can measure them Monday to verify. I have one of each loose.
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Old Mar 20, 2010 | 09:39 AM
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How to identify LS3 valves?-ls3-l-l92-r-intake-valves.jpg

LS3 left and L92 right

The finish of the valve is different. It is actually quite obvious.
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Old Mar 20, 2010 | 09:48 AM
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Originally Posted by See5
Attachment 222454

LS3 left and L92 right

The finish of the valve is different. It is actually quite obvious.
As noted in the link above!!

Here are the pics for lazy people.

Originally Posted by SweetS10V8






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Old Mar 20, 2010 | 10:04 AM
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If they are used you won't be able to tell the difference. They won't be clean like that. Weighing them is best.The best bet is to buy new ones they are cheap enough.
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Old Mar 20, 2010 | 10:06 AM
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I heard that the LS3 valves were lighter than the L92 valves. Interesting to see how much the weight difference is. Also interesting seeing the different finish on the intake valves.
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