I'm not sure on the oil pump question, but on the water pipes the safe choice would be to route them back together. It may be safe to cap them off, but it's 100% certain it's not going to be a reliability issue down the road if you let the coolant circulate through them. There could be a passage on the return side that wouldn't get fed if you capped them off, even though it's unlikely and not very logical.
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FWD is the new AWD
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