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The injectors make a ticking or click sound, that is normal. in your case you'll need to keep an eye on the oil level and see if you have a leak or a burning issue so the level don't go down to any lower.
it's normal for some valve train noise( ticking) it may go away once driven and oil fill is were it needs to.
It did go away after top up of oil. Had my mechanic use an Engine flush and Lucas engine adative with the last oil change I received and I will keep an eye on the oil level. Have not heard it since.