well, i wont argue with the factory shop manual.

but i will say in my experience which spans over thirty years, an 80 degree stat has resulted in a normal operating temp of very near 80 degrees unless the engine is working under severe conditions in which case the temp will go higher.

i apologize for any misinformation about when it opens fully that i apparently disseminated.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.