Originally Posted by TireIron
it is a non-interference engine so it shouldnt have a bent valve unless something else went wrong. is the timing set perfectly between all 3 pulleys? all 3 need to be set correctly. does the belt have neough tension on it?
The tapping noise may be cause from preignition if the timing is misaligned.
A quick way to check this is to take a flashlight under the hood and inspect the timing indicators
through the inspections holes of the timing belt cover.
You'll see a triangle on the pulley that lines up with another triangle on the timing back plate. If the indicators on the oil pump pulley are not aligned with camshaft gear indicators, you need to loosen tension in the timing belt and re-adjust appropriately.
If you can't see the indicators
when you're looking through the inspections holes, turn the crankshaft with a 22mm socket wrench until it is visible.
Make sure the key is off, and the battery is disconnected before doing this. I would also recommend relieving the fuel system pressure or pulling the plugs before turning the motor by hand, but that's up to you and your "level of safety".
Here you can see the camshaft gear and the oil pump gear connected with the timing belt to the crankshaft (not visible).