Another overheating situation 63 Slant six

Hideogumperjr said

So here is my problem, I am overheating at just getting around, I cant drive two miles here in Seattle, read that cool, and it will overheat.

A little history, engine was rebuilt completely a few years ago, block was tanked and cleaned, head rebuilt and all. I had the original radiator checked and it was toast so I bought one off of CL for a later model Dart.

The problem I found though is that the core is biased towards the engine compartment while the original was biased away from the compartment, end result, the radiator is too close to the fan so I removed the stock fan and am using a 16" electric fan in front of the radiator pushing air through. Ive had it there since 2017.

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I don't understand why your core is "biased toward the engine compartment." I'm running a 67 Barracuda slant six radiator in my 63 Valiant. Had to trim the passenger side bracket, which was extra wide to fill the Barracuda radiator support's larger opening, but otherwise it fit like a glove.

Has your radiator ever been worked on? Sometimes the radiator shop won't solder the brackets back on in the correct position. I've had to use a propane torch to melt the solder to remove the brackets, then re-solder them on in the correct position - just to get proper fan clearance.

One other thing I've found: if you let a radiator sit without flushing it out, it will somehow clog up. Not sure I understand why, but I've been told that, and it's happened to me twice and caused an otherwise perfectly adequate radiator not to be able cool the motor at highway speeds. Both times getting the radiator boiled out fixed the problem.