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LS7 Valve Size Question

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Old Jan 12, 2010 | 04:11 PM
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Default LS7 Valve Size Question
LS7 Cylinder Head: I need to know the Overall Length and the tip length of the Intake and Exhaust Valves that come from the factory.

Does anyone have this information?
Thanks in advance!
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Old Jan 13, 2010 | 03:53 PM
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Anyone?
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Old Jan 20, 2010 | 06:06 PM
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Intake 5.1550
Exhaust 5.2525
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Old Jan 20, 2010 | 07:30 PM
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Intake are 4.900 with a .160 tip
Exhaust are 4.923 with a .160 tip
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Old Jan 20, 2010 | 07:41 PM
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Originally Posted by G Engines
Intake are 4.900 with a .160 tip
Exhaust are 4.923 with a .160 tip
Might want ot recheck your measurements-those are 15deg head measurements not 12 deg
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Old Jan 25, 2010 | 06:17 PM
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Originally Posted by DB Z28
Intake 5.1550
Exhaust 5.2525
THANK YOU. I bought 2 new valves to measure them and took them to a machinist and measured 5.230 for Exhaust and 5.130 for Intake so at least I know that I am close!
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Old Jan 25, 2010 | 06:24 PM
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You probably are aware, but just in case FYI once the valves are installed and the lash cap on the intake, they sit at the same tip height.
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Old Jan 27, 2010 | 03:15 PM
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Originally Posted by rsz288
You probably are aware, but just in case FYI once the valves are installed and the lash cap on the intake, they sit at the same tip height.
I knew that....that is why I didn't trust the master GM Manual and Jason at Katech when they both told me that the intake and exhaust valves were the exact same length.

Thanks!
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Old Jan 27, 2010 | 03:54 PM
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You are dead right there. Same installed height but not same length.
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