I have a problem with over heating I have 302 in it not bored stock. It has the original 2 core radiator in it (brand new). The car came with a 289 automatic. Any Ideals were to look the car seems to me to be geared down and pulling to high of rpms.

 

is a gauge telling you it`s running hot or is it spitting out coolant when you shut it off .. start by making sure the thermostat is opening properly .. rev the engine a little and look at your rad hoses to make sure they are not sucking closed .. some older cars hoses do not have the internal spring to prevent this .. there are dozens of reasons to run hot ..

 

I ve changed the thermstat twice shot the engine with a lazor light and it matches the gage the hose I have replaced with the springs in it and I shut it down when it hits 200 degrees and Iam not loosing no colant

 

Also pulled the freeze plugs and ran a camera in the chamber and made sure no blockage replaced the head gaskets head the heads check. The only thing I can think of is that it geared down low or the radiator to small. Its kind of got me stumped

 

try this .. run it and just before it hits the 200 degree mark run a water/garden hose against the radiator and see if the temp falls .. that would suggest a too small rad .. if it gradually gets hot as you drive that also hints of not enuff rad .. if it heats up quickly that suggest flow restrictions .. or maybe even a bad water pump impellor ..

 

i did that and the temp dropped quickly thats why i think rad to small

 

excellant .. get you a griffin aluminum rad from summit .. they`re reasonably cheap and cool plenty good .. got one in my V6 pinto and my 429 stang ...

 

Ill give it a try

 

Running without a thermostat makes the coolant circulate too fast, and all kinds of things can happen. Anything lower than a 180º thermostat can cause the cylinders to get washed down in unburnt fuel, and the engine wont be running efficently besides. If the cylinder walls get enough unburnt gas on them, it'll etch the block and then your engine is junk!