Big diesels don't typically have glow plugs, but they often have heated intakes instead. The heated intake runs much like the later glow-plug circuits with afterglow for easier cold starts and to lower emissions in the first few minutes of running.

My 10.2liter CAT doesn't have either, starts well down to 0*F. Of course the lower surface/volume ratio helps to not lose as much heat to the cylinder walls etc. on starting. Small diesels almost always need some help with cold starts.

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Gone to the dark side

- Jeff