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custom10nut · 03-05-2019, 02:54 PM

That sounds about right. Your thermostat temp only determines when it opens during the warm up. Many don’t understand that putting Coolant in your water raises the boiling point to around 225 deg, then put the system under pressure and it past 240 deg. Also as the fluid gets hot it expands, and that why we have the “overflow” tank.
A four core radiator and electric fan will help you while you’re in traffic.
I was having sort of the same issue with my 350, and summized that the clutch on the fan was working correctly, so I went to a “no-clutch fan, and the issue went away.
I’m not trying to insult anyone’s intelligence, but some just don’t know.

03-05-2019, 02:54 PM	#10
custom10nut Registered User Join Date: Apr 2015 Location: East Tn (In the heart of the Smoky Mtns) Posts: 1,856	Re: How hot do Big Blocks normally run? That sounds about right. Your thermostat temp only determines when it opens during the warm up. Many don’t understand that putting Coolant in your water raises the boiling point to around 225 deg, then put the system under pressure and it past 240 deg. Also as the fluid gets hot it expands, and that why we have the “overflow” tank. A four core radiator and electric fan will help you while you’re in traffic. I was having sort of the same issue with my 350, and summized that the clutch on the fan was working correctly, so I went to a “no-clutch fan, and the issue went away. I’m not trying to insult anyone’s intelligence, but some just don’t know.