Why would one need self aligning roller rockers? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-21-2002, 08:26 AM
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Question Why would one need self aligning roller rockers?

I keep reading about self aligning rockers. What dictates the use of self or non-self aligning rockers?

Thanks,

Paul

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Old 08-21-2002, 09:50 AM
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The self-aligning rocker keeps itself centered over the valve stem, and therefore prevents the pushrod from moving sideways, causing stress on components in the valvetrain.

It is used if there are no pushrod guide plates or close tolerance pushrod holes in the cylinder head.

I just did a TPI SBC not too long ago and didn't have to use the special rocker as the 305 heads had the close tolerance push rod holes.

Most cam manufacturer tech lines can advise you what you need to use if you know the type of cylinder head you have.
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Old 09-12-2002, 02:53 PM
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If you don't have the pushrod slots in the heads(most late model Fords as well as others don't) you need either guideplates or the rockers you ask about. I believe one of advantages of the self aligning rockers over guide plates is less engine friction.
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