Welcome to 2CarPros.
When do you hear the noise? Also, did you replace all 3 chains? Is it possible for you to record the sound when cranking the engine so I can hear it. You can upload it here. Also, I attached a few pics that show timing marks and where they should be. The first is the left the second is the right and the third is the crankshaft. Also, when you timed it, did you confirm the timing mark of each sprockets was matched with timing mark (color link) of timing chain? I ask because this is an interference engine and internal damage will result if the timing was set incorrectly.
Let me know.
Joe
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Tuesday, July 9th, 2019 AT 9:44 PM