2 things will make a engine run hot most of the time.... poor circulation of coolant , or poor circulation of air thru the rad.... or both,,,, and ,,,, sometimes real late ign timing can do it.... make sure that the rad. is clean and free flowing,, and there is plenty of air coming thru it.... if you dont have a fan shroud , buy, build , or steal one and put it on.... or make sure the fan blade is within 1 in. of the rad. and multiple blades not just 4 ,,, at least 6 or 7..... and personally , I dont like clutches because they go bad and toss the fan thru the radiator... but they can cause over heating if they dont work right....I prefer to run either straight drive fan or electric fans.... set up right electrics have some advantages in city traffic.... to me,,, one would want a engine to have as much ''cushion'' temp. wise as possible,,,, not lower than 160 deg. but not very much over 200 either...Buick engines in the 50's thru 70's were designed to operate in that range.... nailheads, sbb's and bbb's.... so I go with ''old school '' ways and change thermostats in spring and fall...the way we used to do it.... 160 deg. in spring and 180 deg. in fall.... so the engine has a temp. ''cushion'' before it reaches the upper limits... if it wants to run cooler , it can......just some ideas
Bookmarks