Valve rotator?

I am reconditioning a set of BBC truck heads and each spring (ex and int) has a thing underneath it that appears to be a valve rotator? Not sure, never seen one. They are about 1.8 to 1.4 inch thick and consist of two cups basically that spin against each other (like a turn table).

I want to replace the springs and am wondering if these are necessary to keep in there or if it would hurt to leave them there? My cam lift specs are .515/.530. Let me know if you need more info. Thanks. I plan on using a single spring w/damper.

Take them out.

on a stocker, valve rotaters on the exhaust are great, but you don't need them.

If the engine is going back into a truck, use the rotaters, the valves will last a lot longer on a heavily loaded engine. They aren't much use on a car engine, mainly because they force the use of shorter springs, thus limiting valve lift. Be aware of the fact that if you chuck 'em, you'll need longer springs.

Lets say I chuck them....I would require a spring cup of some sort to keep the spring from juggling around, and some shims most likely?

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Originally Posted by DennyW

No, like pope said, you would need different springs, and retainers. Also, you have to go back to basics. You would need to check spring installed height, and spring pressure at that installed height.

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Thanks... :)