what can cause an lt1 engine to run hot? i already checked the oil and found no milky residue, coolant is clean, water pump was replaced new thermostat too, did a radiator pressure test and holding 16lbs, so i dont think i have blown head gasket or cracked head (worst case scenario) timing is at factory setting, electric fans are running, only thing i never looked into is the radiator. any other suggestions? btw its in the 40s in MI so its not that hot around here

 

update: i just noticed on my fans the driver side runs when ever the engine is running but will not run when key is switched to "on" with engine off the passenger side does not run at all. is this normal? the passenger side fan is right next to lower radiator hose

 

LT1's will run hot if they have air in the cooling system. They must be bled using the factory procedure. They will not purge air like a normal SBC.

 

a shop replaced the water pump for me and tossed in the new thermostat so it would seem to me they would bleed the system but ill try to burp it