How's everybody doing with the new engine (introduced on 2015 models)?

I took delivery of my first units with this replacement for the Mazda second half of last year. I've got seven of them in service now.

Initially, they've performed without any significant issues. Just some grumbling on the maintenance end that they are more difficult to work on due to the cluttered engine compartment.

Just this past week though we may have discovered a **** in the armor. One unit had a head gasket fail at 2300 hrs. While it is possible that the truck was overheated, it's not certain. My dealer claims this is the first such failure they've seen.

For comparison, we collectively put over 2 million hours on our fleet of 2.0L/2.2L Mazda engines and maybe had one head gasket failure. And that occurred at ~25K hours.

I'm certainly hoping this proves to be an anomaly. I'd like to hear how others are doing.