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Old 06-12-2012, 08:35 AM   #6
V8 Bob
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Join Date: May 2010
Location: Granger (Northern) Indiana
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Default Re: How hot can you really run a flathead safely?

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Quote:
Originally Posted by Automotive Stud View Post
I have a new Walker radiator and 170* thermostats in my 59ab, it usually runs around 160* but on a hot day in traffic into a car show she'll creep up around 190* It will cool right down once you get moving again. I never thought this was a problem but my dad knows more about these motors than me and he said that's too hot. So how hot is too hot?
Running 190-200* in traffic on a hot day is really not too hot, but 160* on the road is too cold for good engine and oil life, imo, based on factual info.
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