Thermostat question

mguner said

Actually there is no rock solid explanation of what a thermostat change will do for you until you do it. IF you have one that is defective, sticking open or closed etc. I had a 440 Demon that was fine until you stopped, fan and shroud were good, 3 core radiator all in good shape but, pull into a drive through and it would boil over. I put vent holes in the fender wells, blocked the bypass, 165 T stat. Still no luck. Put a 195 T stat in it and it ran cooler in all situations than ever before with no more boil overs.

Click to expand...

They are not created equal as well. The store brand I started with has a floating rivet and hole to help bleed the air, seemed good but it restricted the flow. Changed to a Milodon high flow 185 and there was a substantial difference when the components were re-shot with the laser. Head and upper block temps dropped drastically. My radiator was working fine according to the laser with about a 60 to 70 degree drop from top to bottom. Problem seemed to be nothing but good flow. My temp difference on the radiator are lower now but over all the temps are around 190ish!