Hey guys,
Thought I'd leave this here if anyone is into 3D printing. Here's a simple
https://www.tinkercad.com/things/7T1aCsHd1m4 small grill insert.
If you take 14 of these and attach them as shown it does a pretty good job of keeping the engine warm in very cold weather. I'd rather have printed it in black but I didn't have any black filament handy only green.
The following was 6mi driving down the road right after startup when the outside temp was -26C (-15F).
Honestly if it's warmer where you drive you might want to block with fewer pieces.