Forgot to add, my conversion has manual glows as well, just a switch on the dash.

I usually give it a second of glow even when hot, just because I like the sound of it starting on the very first cylinder that comes on compression, vs. cranking for any length of time. Given the choice, I'll change all five glow plugs five times over vs. doing the starter just once.

__________________
617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap