I was wondering for those with experience with the Ecotech if they can answer a few questions I have since I don't really have experience with this vehicle yet.
Is engine tick during normal operation something that these engines do? My tired 3100 did this, which was normal for the mileage that it had but mostly went away after the engine warmed. Mine has been doing this without changing volume after warming up for some time now.
Also how much have you observed your mileage change since the start of winter? I know due to idling and other factors in winter (like timing changes to prevent knock) that mileage normally decreases, but I have been noticing a decline in my mileage up to 10mpg less than what I was getting in the summer (imperial; from 35mpg to 25mpg all city pretty much) which seems rather large to me.
Also my heater when it comes on make an loud noise in the cabin, a very rapid knocking sound.
Basically what I would like to know is if these things are normal for this vehicle or if I should be concerned and get them looked at. I have never dealt with these cars nor 4 cylinders in general for that matter, only V6s and V8s.