Overheating issue-what am I missing- 66/383 AT

[66chgr383]

Re-cored radiator(professionally), new thermostat, flush and fill, had a mechanic check my work (I'm semi-mechanical) still running to the right side of the temp gauge, borderline danger zone-doesn't matter how long or what kind of driving, seems to drop down at idle- hasn't spewed as of yet.....suggestions? THANKS!!!!

[b5blue]

Check the gauge and sending unit, have a mechanic check temps with a hand held infrared gun. Timing can make it run hot but it normally spikes at idle and drops at cruising speed. Air pockets from not getting the system full. A restriction somewhere or a crappy pump. 

[John_Kunkel]

What kind of fan? Shroud?

[1970Moparmann]

What temp you running when driving?  Need more information.  What kind of water pump/water pump housing/thermostat/mechanical fan or electric??........

If you answer yes to having a 440Source water pump housing, there's a huge write up about this..... I had a big overheating issue that I had to resolve...

[A383Wing]

don't rely on the stock gauge being accurate.....install an after market gauge set for oil press & water temp

[1970Moparmann]

don't rely on the stock gauge being accurate....

I agree! 

Best thing to do is to get a laser heat gun and see exactly what your temperature is.  Check on the water pump housing/heads/block and report your findings.

[Rolling_Thunder]

what sending unit are you running ?  If you run the GM style one that is included with say an autometer gauge your temp will read high but it will not actually be hot.