Hey folks,

I am building my Mk IV with the 2015 Coyote engine (gen2, I believe). I have run it for short periods a number of times, but now I want to get it up to temperature to make sure the cooling loop, water temp gauge, etc are working well. I have the recommended Factory Five set up for colling (with the shiny puke tank, rather than an expansion tank). My issue is that the engine may run at idle for 2 minutes without the temp gauge moving at all. This makes me nervous. I also don't feel any heat in the coolant lines. I am wondering, how long should I wait to let it get up to temp, and are there recommendations beyond FFR's instructions on ensuring i don't have air in the coolant lines?

Thank you!

Brian