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Old 02-01-2009, 04:09 PM
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cam button for retrofit roller

Can someone explain the function of this?? does it bolt on the cam?? how does it lock the cam in??

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Old 02-01-2009, 04:40 PM
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from the vortec build from popular hotrodding,
"We used a nylon thrust button from Summit, which fits in the center of the camshaft gear, and bears against the timing cover to limit unwanted fore and aft camshaft movement. Ordering a camshaft with the Gen II nose would render the thrust button unnecessary-you'd just use the factory thrust plate."
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Old 02-01-2009, 04:45 PM
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It keeps the cam from walking out of the block per say. It does not bolt in, rather it will go into the hole in the center of the cam sprocket before you put the cam locking plate on. You want to get something like .002-.005", end play between the cam button and the timing cover. Others may be able to give the correct end play. I can't remember off hand what I set mine for. You don't want the cam to come forward since it will destroy the roller lifters and cam. Flat tappet cams have a ground in angle to the lobes to make the cam run to the back of the block. That gives you a basic overview of what it does.
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