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when cold the engine will make more noise, if you fully warm the engine/oil it will quite down a bit. I agree with the others, sounds like the fuel injectors firing though.
 

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That's a combination of the loud injectors (ticking) and noisy timing chain (knocking).
The timing chain on GM ecotec engines has always been loud, even this newer 1.4T version. Think this one is loud you should hear the old 2.2 "eco-tick" when the oil was cold, sounded like a diesel engine.

A timing chain will always make more noise than a belt, but I prefer the noise to having expensive maintenance & possible failure of a belt.
 
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