does this engine come with a knock sensor if so where would I locate it?

what kind of a knocking noise, is it a thumping noise ,does it speed up when you rev the engine the best thing to do if its possible is pull the oil pan off to check for pieces and filings in the pan if there is something in the pan then you probably spun a rod bearing...

I agree with gg.... You can start the engine... remove one of the plug wires... It will misfire but ... Do you hear a difference in the knocking noise?? ... Repeat this for all four cylinders! IF noise changes or disappears, rod bearing is your trouble!!