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Generation III Internal Engine
Help me to identify this rocker arm

Generation III Internal Engine 1997-2006 LS1 | LS6

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Help me to identify this rocker arm

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Old

May 12, 2017 | 09:37 PM

#1

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Help me to identify this rocker arm

Thank you.

Last edited by young_alex60; May 15, 2017 at 09:07 AM.

Old

May 12, 2017 | 09:39 PM

#2

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On the left, you can see the almost brand new " LS1 " rocker arm. On the right, this is a factory 03 LQ4 rocker arm. You can see there's a difference in en angle of the "tip" and the bearing is not the same.

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Old

May 12, 2017 | 09:42 PM

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On the last picture this is not really clear but you can see a thread. I can't slide the bolt on and off like my factory lq4 rocker arm.

Thanks again guys

Old

May 12, 2017 | 09:47 PM

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This rocker looks aftermarket. Whose? Good question! The bearing is a different type than the factory type.

Old

May 12, 2017 | 09:59 PM

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those are not for an LS engine. they're for the LU3/LG3 4.3 V6

Old

May 12, 2017 | 10:48 PM

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That explains why he was given 12 of them; a complete set for a V6.....

Old

May 12, 2017 | 11:11 PM

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Put it on a head and check geometry! ;-)
The 60* v6 rockers look like this also.

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Old

May 13, 2017 | 12:38 PM

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Correct me if I'm wrong, but I believe the 4.3 rockers are 1.6 ratio and the LS rockers are 1.7. From the first shot it looks like the push rod socket is a little further from the rocker fulcrum than the LS.

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