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Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

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Old Aug 15, 2011 | 11:42 AM
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Default valve?
I have a set of 5364 heads, is there a way to tell if they have hollow stem valves or sodium filled ones without taking them out? if not do you just weigh them?
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Old Aug 31, 2011 | 09:11 AM
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weigh them to be sure. Hollows will be 91grams or so
solid around 120grams
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Old Aug 31, 2011 | 03:15 PM
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Here's an old thread that might help:

https://ls1tech.com/forums/generatio...omparison.html
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Old Sep 24, 2011 | 12:38 PM
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thanks guys
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Old Sep 24, 2011 | 01:26 PM
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The LS3 valves are fully machined, so the valve face in the chamber is smooth. The solid L92 valves have a rough "as cast" surface on the face of the valve.
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Old Sep 24, 2011 | 03:18 PM
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Originally Posted by A_VAS
weigh them to be sure. Hollows will be 91grams or so
solid around 120grams
The L92 valves are 107g.

The last LS3 valve i weighed I believe was 88g.
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Old Sep 26, 2011 | 07:28 AM
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well i bought some ls3 heads and i thought i heard they can have sodium filled valves or hollow stem. So i was trying to figure out if i needed to upgrade them or not since im building a high reving boost motor.
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