[VirginiaF1]

Originally Posted by arttrout

Started just fine after work today and the temp was 102! Got stuck in 5 miles of stop and go and the temp was starting to climb past the 3rd line. Switched on the heat and it dropped to under third line. 102 out and the heat at max sucks! Radiator is full, no leaks, all fans running. Is this normal?

Howdy..
Page 36 of manual states that upper third (212F - 239F) indicates that "the engine is overheating"..

More experienced posters than myself can advise us for how long our aluminum M44 engines can run above 212F..

If the radiator is original, then perhaps (like me) you're due for a new one.
After much research and debate, I added Redline's Water Wetter last year and saw an immediate drop from ~212F to 195F during 100F ambient days last summer.
(After a fresh G-0 5 mix and radiator flush..)