1st: I'm officially a diesel convert, I've seen the light.
I've had my '98 12v QC for about 6 weeks now and really enjoy driving it. I was a little concerned about the 5 spd during D/FW rush hour traffic, but I actually look forward to the stop-n-go as I enjoy 'rowing' the gears.

Questions: (forgive, I'm still a newb)
I've been under the impression that a diesel will disipate engine heat better than a gasser (ie: less of an issue of overheating while idleing).
Is this true? And if so, Why?
You would think the opposite would be true w/ the higher compression ratio.

I plan on getting a pyro & boost guage and I'm aware of keeping an eye on the EGT's. But, can I idle safely during Texas August heat? The temp gauge reads a constant 180-185 so far.
What's the ideal range for these motors?

 

they idle cold all the time, extended cold low idling will kill the cummins, whenever i idle mine, its fast at -40 or +100f, 1200+,

not during a few minute warm up, or cool down

 

Diesels cool off at idle better because there is no throttle restricting airflow through the engine. Also there is less fuel being burned, meaning less heat being generated.

Idling in traffic with the A/C blasting isn't going to hurt it. Between the load from the A/C and the heat outside, the inside of the engine will stay warm enough. What you want to watch out for is extended idling in conditions that let the EGT drop below 250 degrees (like cold weather).

 

Just keep the EGT temp up above the 250 mark your good... If I'm going to sit in traffic I will throw on the jake. It will kick the EGT back up to 400*F easy! I can idle all day with that...But I wouldn't do it...