Thank you.

 

the first things i would do are make sure the fan is pushing properly, drain the rad and put in 1 gallon of antifreeze followed by straight water, then i would replace the thermostat witha very low one, maybe like a 160, cause thats when it opens, not where the engine will run at. if that does not fix it you may have clogged passages like one of the guys said

 

What size Rad is in the car?

 

I 2 have a 69 with a big block 454 I have a brand new be cool radiator with dual fans all new.My temp gauge is also brand new as is the thermostat and fluid.Big blocks tend to run at 200 -210 all day long my sensor is set to kick the fans on infact at 210. never has it over heated anything over 210 then you have issue's

 

this sounds like an igniton module to me big blocks tend to run 200 210 .I had some probs eariler this year with exactly what you have described I changed the ignition moduleI havent had any problems since

 

mine runs around 195,Don't know if the 3 core rad has anything to do with it.

 

you have a 3 gore,wowi only have a 2 gore,i mean core....i too have the be-cool radiator..... a ignition moduel ussually just goes dead and wont start ive never had any fair warning,if its starting hard its your timing or starter dragging,may need a mini starter if its higher compression..

of course i run those ultra powerfull small blocks,mine never goes over 180 in town,in florida and mine is a highly built 400,set-up at 10 ta 1...

 

man My ignition module gave me fits for over a month b4 I figured it out.everytime it would get around 200 210 it wouldnt restart until it cooled off for like 30 minute's replaced in havent had the problem since.It took all of 20 minutes and less then 50 bucks problem solved

 

Lots of good info, I read some place that 190 to 210 is fine for a small block. But ??? on a big block. I would think it would be the same. Note new cars all run a lot hoter.

 

I was wrong, mine runs around 200 and 210, I had to look a little closer.