I would make sure it is centered. They do it that way at the factory for a reason.
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I need to change a oil pump on a ls2.whats the correct way ?
Buy a manual or search for an accurate procedure, then follow it.
There are measurements to be taken w/ the pump cover off, to ensure the pump housing is properly centered and the eccentric has the right spacing. Not something you want to trust to luck.
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You have to have equal amount around it. have to use a feeler gauge, but ive heard you can put it on and loosely tighten and and turn it over about 4 times and it will be centered, then it doesn't take as long to check with a feeler gauge. I cant remember the exact thousandths it is though