Okay, so the greasecar wouldn't get warm for a long time. Unclipped mono and no change so decided it was the tstat. Replaced it today, car warmed up at idle very nicely. Too nicely.
Now at idle it can get over the 100 mark on the gauge.
Burped by putting nose up (drive is uphill so put it in the driveway) and idled for 40 mins or so. Started getting hot at about 20 mins. I turned the defrost on high and that allowed the gauge to go down. But only to just above 80.

Went to pick up the DD, about 8 miles, and the temp gauge went high again. Went lower with the defrost on. But again, not to 80 mark.

I want to drive it tonight to the bar but don't want to overheat on the hwy.

Any other ways to burp?
Thanks

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Ginny in Denver-ish
78 300SD, 265K (mine)