Over heating

[Gypsy]

I have a Monaco 66 with a 383 Engine if the outside temp is over 24 C she will overheat
I was told a oversized water pump may help ? I installed an extra electric driven cooling fan
the only thing that helps a little is if I turn on the heat in the vehicle
Your input will be much appreciated

 

[Sixpactogo]

I see you have a shroud and it looks like a flex fan. Is this a new issue? Is it only at idle? Or does it overheat at highway speeds? We need more info as to when this problem started and what you have done so far.
Personally, I never liked those flex fans. I prefer the thermo clutch 7 blade fans with the shroud. It could be any number of things such as a plugged radiator, timing issues, thermostat issues, belt slippage, collapsed hoses. Nice car by the way.

 

[volksworld]

first thing to try is if radiator is clogged ....with the level down look in and see what the ends of the tubes look like....a good radiator shop (if they still exist in your area ) should be able to flush it or worst case take the tanks off and rod it out or even re-core it...but with the current price of copper a re-core is not cheap

 

[CBODY67]

I concur on the flex fan. When they came out in the 1970s, they were considered a "power saver" so lots of hot rodders put them on their cars. Can cool well, but generally noisy, even on the highway with proper placement in the shroud. Been there, done that, went back to an OEM-brand fan clutch and the factory fan.

One thing not usually considered is accumulation of "gunk" in the rear of the block's coolant passages. When was the last time those were cleaned out? A messy job, for sure, but necessary in some over-heat issues.

Generally, if the radiator is clean and the block coolant passages are clean, no "over-heat" should happen.

High capacity water pumps can be counterproductive, from my experiences, although they look great on paper and in theory. But on the vehicle I put one on, actually an aftermarket casting which was more ample in dimensions with clean internal castings, the temp needle was 1.5-widths higher on the gauge, with the same 180* F thermostat. Contrary to their sales literature!

Now, finally, what is your definition of "over-heating"?

Take care,
CBODY67